Rough Idle In Morning

my 02 2500hd has just started this rough idle issue as well,i only have 64000 miles on on my truck and the truck has never once have had a problem. 4 litre engine 180 000 Km rough idle started suddenly one morning things I've tried and tested changed spark plugs twice replaced throttle body gasket replaced intake manifold gasket tried new coils checked engine compression all between 216-222 psi checked engine vacuum not steady but between 14-15" mercury added two cans combustion. The normal idle is about 600 RPM. idle speed after cleaning throttle body. In N or P, the idle would be a bit lower then when in D, and there was no load on the engine. [50] Wednesday Morning Links [42] Thursday Morning Links [26] Monday Morning. Rough Idle, Trys To. A dead sign is usually a random miss code p0300 either pending or present. I am pretty sure I figured out what my problem was, the studs that go into the adaptor under the carburetor, one of them was threaded in so that about 1/16" or so. " "Of course yo. A code P050D should be addressed at your earliest convenience and considered severe. Rough, Unstable, or Incorrect Idle and Stalling. If you are running a configured idle speed that's higher than stock, it's possible to observe a slight oscillation in idle speed even when everything else is working properly. Rough idle & difficult to stay running in the morning. Re: Service engine soon and rough idle that's probably nothing serious. Sometimes, vacuum lines cause a rough idle due to a vacuum leak, and these lines are also simple to replace. Excursion 6. Whole process from start, rough and back to smooth is under 20 seconds. I noticed a little difference when changing spark plugs, enough to convince me, that's just how the car runs, but I'd be interested to see if there's a "fix". In my experience the idle speed will dip down to about 500 rpm a few times in the morning and if I try to drive it before it settles down the car will die. It also smells like it is running rich during this rough idle/stall period. Vy v6 Rough idle. My impression was that the valvetronic takes some time to initialize. The car has 79,000 miles and has had the High pressure NG filter changed in the last 2500 miles and the timing belt and water pump changed in the last 5000 miles. It is just a rough idle, not misfiring under power. I've done a bit of googlight and i think it might be a little bit of a dirty carb? The car was only driven 400 miles in the last 5 years. If you are running a configured idle speed that's higher than stock, it's possible to observe a slight oscillation in idle speed even when everything else is working properly. It will often die on me unless I feather the throttle. I turned on the AC this morning while stopped at light. Does anyone know where its located? Also will a bad 02 sensor make it run rough all of a sudden? It has been an AWESOME running vehicle until this morning. lines ziptied, and any other clamps tightened this weekend. Now the only problem is engine idles rough for few second when first start in morning (cold start) after about 1 minute every thing is fine and no more rough idle or stalling. 2000 alero rough idle from cold start Results 1 to 6 of 6 Discuss 2000 alero rough idle from cold start in the alt. The Service Engine Soon light comes on and starts blinking. Mine is a Non-turbo just in case it matters. I went to auto zone to see if it was a misfire but the scanner returned P0014 which could have been multiple things but the guy at the counter said most common is the cam position sensor. This can cause stalling or low idle in our trucks. MAF sensor cleaned out. Red Sky At Morning Book Summary Rough Idle Bmw X5 User Manual Homileticsthe Timothy Initiative Staff Meet The Gizmos The First Kids On The International Space Station. A code P050D should be addressed at your earliest convenience and considered severe. I have been experiencing some annoying rough/erratic idles on cold engine starts. Voltage drops, rough idle, voltage returns, smooth idle. ASV RC-100 Rough Idle and Smoking Ok guys, I got some good advice from you fellows last problem I had, so maybe someone can point me in the right direction here. I have a 2004 with the 4. rough idle after cold start on 3. As the first wave of BMW 5-series E60s reaches an automotive geriatric age of 15 years old, parts begin to wear out and our beloved bimmers start to lose their once silky sweet engine performance. well, after i cleaned up MAF the stalling when car come to stop is resolved and never happened again. On the rough idle issue, I've recently syncronised my carburetors as I suspected a slight misalingment: indeed, my right hand side cylinder was pulling a bit more than the other one. Once warm, it usually. P050D Code - Cold Start Rough Idle. The spray smoothing out the rough rpm is an indication of the engine running lean, could be low fuel pressure, could be a vacuum leak. What are some of the symptoms of the code? Symptoms of a P050D engine code may include:. Those of you experiencing the rough idle should have this looked at!. The idle varies on the tachometer by 75 rpm and you can hear the engine change speeds. Bought from original owner, all stock parts, and never been to the dealer for any service other than fluids and filters. I sure do need some professional advice, my 944 just had a new timing belt and runs great when its warmed up, but have noticed that the gas mileage is about 100 miles less to a tank, plus the idle in the morning is very rough until she gets warmed up. I turned on the AC this morning while stopped at light. It has 3 codes---303,304,305. The entire car shakes a bit until it warms - Chevrolet 2003 Tahoe question. Clean light brown colored plugs indicate a proper combustion event. A failing oxygen sensor can also cause a car to run rough while idling, but it won't affect the car while driving. There is alot of things this can be my truck did the same thing,btu this was when i put a new cam in it. 2016 Rough Idle Startup For some reason it does that in the morning, but the rest of the day it starts normal until the next morning again. Since I finally decided to take the car in to the dealer to get the drift-to-the-right problem fixed, I figured I'd mention the rough idle issue to the service advisor. I got to and from work just fine, but while letting the car idle in the parking spot of my apartment for a minute before shutting off the engine the check engine light finally came on. 5 v6, 125,000 miles. Then idled at the same 800rpm. After about a minute or so it will idle rough, sometimes idle down to 300 to 400 rpm, sometimes activating check engine light to flash but not stay on steady. During initial startup my understanding is that the air intake is controlled by the throttle body (which is normally not used as air is controlled at the engine intake valves). Think about legilimency? Harry Evans was probably his sister. on my way into my 48 hour shift at work, truck is idling really rough, almost to the point of stalling. Changed bank 1 #1 o2 sensor. My Accord is smooth. To the OP if it is found that you have a faulty purge valve you need to insist that they replace the evap canister. Honda Accord: Why Does My Car Idle Rough? Your car is in "park," so why does it want to drive? This article will discuss some of the potential causes and solutions to fix this stubborn car problem. When it's rough, the vacuum drops to about 17" in neutral, or 13 to 15 in gear. I cleaned the MAF and had no change. A dead sign is usually a random miss code p0300 either pending or present. After a few minutes it goes away. I have a 2004 with the 4. I have a 2001 Ford Taurus which when I start it up in the morning stumbles and idles rough until it warms up and then it runs great. Coolant, check the transmission fluid. Dodge Truck & SUV forum with the best tech and vehicle help on the web. Then you should check all the vacuum hoses — a leaking hose can cause a too-lean mixture and a rough idle. I assumed this just meant get an oil change and i was going to get. 2018 Escape 1. The EGR was removed and has a block off plate by the P. Failing Electrical Components: A problem or failure in the ignition system or various electronic components can cause a rough idle. So far as the rough idle goes, (I cant say about the speedo) I'm going to hazard a guess you have a problem with the Idle Air Control Valve or some call it Idle Air Motor. 9l gas engine, it's pretty easy to change and was fairly inexpensive. it had 180,000 miles in it for 3,500 and boy did it run smooth. got the new IAC valve installed, and i still have the rough idle. Cleaning out the carburetor to remove carbon deposits is probably a good place to start. 7,000 miles on the 2015, and for the past two weeks it's been consistently coughing a little when it starts up in the morning. The car drives fine but when your at a stop light,you can feel the whole car vibrate a little,Its not too bad,but was wondering about any ideas to cure this. several new injectors. He wasn't sure if it was the gasket or the intake pipe itself so he wants to replace both. Cleaning The Throttle Body and MAF Sensor. After the truck ran for several minutes, the enigne knock and roughness cleared up. Changed bank 1 #1 o2 sensor. I reset the ECU because it was recommended on a Civic forum; didn't make any real difference in fuel economy or rough idle. USUAL CAUSE The usual cause of abnormally high idle speeds are vacuum leaks or an inoperative idle speed control motor. I can drive 2 miles to a stop sign and it idles normal at about 700 and is fine there after as long as its warm. Diesel Forum - TheDieselStop. I don't have a rough-idle, single-bank issue, I have a total non-starting problem. But be sure to use the google search bar in top right corner and not the T4R search function because IAC will not show up in T4R's search since it is 4. For faster and easier. As the first wave of BMW 5-series E60s reaches an automotive geriatric age of 15 years old, parts begin to wear out and our beloved bimmers start to lose their once silky sweet engine performance. How to clean a MAF sensor. Specifically, in the morning when the car has been started from a cold state, I: I. It ran fine last night, after cranking the crap out of it to start. Rough idle with forced induction This was brought up in my build thread, as a result I found a few guys have the same/similar problem. hey guys i have an 08 r1 with an akrapovic y-pipe(cat eliminator), bmc air filter, and racing baffles (which essentially just replaces the baffles in the. The normal idle is about 600 RPM. If I press lightly on the accelerator it smooths out. Have a 96 250 with a 351w, been dealing with rough idle in the morning before reaching NOT. A dead sign is usually a random miss code p0300 either pending or present. i can also hear a noise from the engine similar to an exhaust leak. My 2011 ltz 1. Can you help me please? A The first two areas to consider would be intake system vacuum leaks and/or a faulty engine temperature sensor. It generally happens in the morning or when the truck has sat for a few hours. Engine/Transmission (1998. Lastly, if you suspect the intake manifold gaskets are leaking, you can take a product like WD40 and spray it along the edge of the intake manifold while the engine is idling. How to clean a throttle body. has been above 60 degrees the duration of the rough idle has decreased or disappeared. Vy v6 Rough idle. I really need a little help. Rough idle? This is a discussion on Rough idle? within the RAM 1500 Diesel Mechanical forums, part of the RAM 1500 Diesel Garage - RAM 1500 Diesel Mechanics Corner category; So I was in the drive through this morning and thought I felt something odd. My MPV has been running terrific then one morning it starts to idle rough and the CEL light comes on. This morning (again temps in the low 50s), rough idle of the same magnitude, backed out and put in drive, same bucking, check engine light this time and the rotten egg small again. Applying throttle smoothes it a bit, but not much, trying to drive, it gets close to stalling, sometimes does stall. I wait a few minutes and the car begins to idle normally and runs great although the engine light stays on. of an engine or vehicle : to run without being connected for doing useful work. when I put it into drive it would seem to idle fine for a few seconds, then start to flutter between 600-1000rpm. Coolant, check the transmission fluid. I have been experiencing random rough idle on cold start. After a few more days the engine management light came on. no such luck. During initial startup my understanding is that the air intake is controlled by the throttle body (which is normally not used as air is controlled at the engine intake valves). 0 SOHC, 110,000 miles. Took it to the dealer and they said that is normal for a 4. but doesn't drop. If i turn it off and start it right back up there is no problem at all, but if it sits for 10 minutes or so it gets a rough idle when i start it back up. Vehicle status check yielded all systems OK. Since I finally decided to take the car in to the dealer to get the drift-to-the-right problem fixed, I figured I'd mention the rough idle issue to the service advisor. after starting i get a rough idle, sometimes you will hear the engine struggle a bit and you see the revs drop slightly. It's only the first start in the morning, and instead of cranking a few quick times and then growling, there's a cough-like pause before it growls. rough idle after cold start on 3. There was some oil found on the coilpack when it was pulled out. Idle smooth as silk for a 15-20 seconds, then rough and lopey for 5-10 seconds. 0 CR TDI (Engine code CBBB). Loud Engine/Rough Idle 2. Remove the Honda idle air control valve. Each morning, my truck started up without a rough idle at all. any tips on what can fix this. It sounds like you have a lack of pressure in your system. Today I went to autozone and they did a scan which came up with a P0301(only code, supposedly a cyl-1 misfire). com/forum/index. On most morning at initial start-up the engine has a rough idle until temp gauge reaches normal range. 0 SOHC, 110,000 miles. To me it sounds like a bad injector. Both are bolted onto the throttle body. rough idle and stalling. My mind went straight there too. Hi fellas, I've had my 2008 9-3 for 6 months now and it always have a morning start cold idle issueit would start rough for about 3 secs or until I put in gear and after that for the whole day no problem whatsoever. The guy said it could use a tune up. Awaiting Monday for service to check it out. My car did idle like hell before and after I fixed it. The idle has been rough for a few months. Problem has been intermittent until this morning, the car left me stranded. and i also notice a huge power loss during that time period. re: rough idle during warm up. I got to and from work just fine, but while letting the car idle in the parking spot of my apartment for a minute before shutting off the engine the check engine light finally came on. 2016 Rough Idle Startup For some reason it does that in the morning, but the rest of the day it starts normal until the next morning again. A few weeks ago (on 8/15 to be exact), I made a post about sputtering and rough idle. hey guys i have an 08 r1 with an akrapovic y-pipe(cat eliminator), bmc air filter, and racing baffles (which essentially just replaces the baffles in the. any tips on what can fix this. Those of you experiencing the rough idle should have this looked at!. If the car starts when cold but, idles rough or does not want to stay running, this can indicate a problem with the engine. idle synonyms, idle pronunciation, idle translation, English dictionary definition of idle. The truck ran fine all day. 4 out of the 5 days this past week I drove home on the interstate. The idle is always rough. Current temps are single digits in the morning, approaching 10C. started the car again and the problems disappear. Fast Eddie I believe you mentioned the first and only indication of the valve problem was a rough idle after a cold start. I'm having the same exact problem with my 2007 Civic, manual tranny. Have the 2nd-gen 2007 MDX with only 22K miles on it. 3L Power Stroke Engine and Drivetrain > rough idle in the morning! Reply Page 2 of 3. It has now been another week with this issue and no resolve. Seems to be running fine otherwise. Rough idle repair on the BMW 530i E60 is an easy procedure that is usually caused by a bad DISA or idle control valve on the intake manifold of the car. side, and PCV on driver's. hey guys i have an 08 r1 with an akrapovic y-pipe(cat eliminator), bmc air filter, and racing baffles (which essentially just replaces the baffles in the. Definition of idle for English Language Learners. this is my first diesel truck. Coming back to the rough idle, when the car is stopped but in gear, the "pulses" from the engine get sent, through the tranny, to the wheels - which are nothing more, in this case, than torque springs made of rubber. 4 out of the 5 days this past week I drove home on the interstate. When this is. It still idled a lil rough but not as nearly bad as it has. Define idle. 2002 Honda Accord EX, L4-2254cc 2. I have a similar problem sometimes. When I start it in the morning or after sitting for a few hours, the idle is very rough. It has now been another week with this issue and no resolve. Check for objects blocking the IAC passage or throttle bore,. Just purchased a 09 vw cc with 98000 miles. However, Ian's coil swap is a neat idea for a quick check. anyone know what this might be? only started this morning, before that the idle revs have always been dead on about 800rpm once warmed up. The guy said it could use a tune up. The car struggles to accelerate. and it then idles roughly. Have a 96 250 with a 351w, been dealing with rough idle in the morning before reaching NOT. If this is the case, the problem will usually get worse as RPMs increase. Clean light brown colored plugs indicate a proper combustion event. Me too thought it to be the battery, since my battery is kinda old. and sometimes it will shanke the whole truck at the idle. Re: LOW ROUGH IDLE, Sometimes dies! I had all the same crap, did all the same stuff everyone else above did, made some gains however the bottom line for my truck was a Throttle Positioning Sensor. no such luck. : to spend time doing nothing or nothing useful. Those of you experiencing the rough idle should have this looked at!. Rough idling is a common problem, of which the exact cause can be difficult to diagnose, as several factors may come into play. I stopped at the gas station for some provisions, and when I got in and started it up, the rough idle returned and the engine light came on. I just replaced the plugs about 3 months back and it ran fine after, people have told me things like it is the o2 sensors to the cat is plugged up to my fuel filter is bad. I have a 95 Buick Lesabre with 89,000 miles on it. It will often die on me unless I feather the throttle. Each morning, my truck started up without a rough idle at all. Started it again Monday morning and no rough idle. Ive had a few come in the shop with a rough idle due to the chain being stretch or slack from worn guides. I was having the same exact problem (rough idle but nice and smooth once I accelerated). Since then, it has become worse, and now there is the additional symptom of a STRONG fuel odor. gm forum at Car Dealer Forums; I have a 6 cylinder 2000 olds Alero. At that time in September the dealership replaced the valve per the computer code. It's not hard to start, but the idle is pretty rough for a minute, until it warms up. It is not the same as when the AC compressor kicks on. Cleaning The Throttle Body and MAF Sensor. 3L Power Stroke Engine and Drivetrain > rough idle in the morning! Reply Page 2 of 3. The car seems to shudder every few seconds, and idles smoothly between shudders. This problem has been intermittent for a few months. rough idle in the morning Discussion in 'Engine & Performance' started by bigwreck, Mar 13, 2010. Hope this helps. After pumping the pedal a few times the car started right up this morning. It's never stalled and the tach barely moves if at all. Check for oil in the spark plug tubes. A code P050D should be addressed at your earliest convenience and considered severe. The roughness is more pronounced as the outside temperature gets colder. +1 on the small pebbles stuck in the throttle cable pulleys on the throttle bodies. Once its warm it'll stay running and won't surge, but it still has that lumpy idle. The computer in turn will then provide additional fuel which will result in an abnormally high idle. It's throwing codes 300,301,302, and 304. More than 10 hours, give or take, and it happens, less than 10 and it generally doesn't. I read a few threads about the engine running on the colder side of the gauge so I didn't consider it an issue. £5 from the garage. Replied by hemified05 on topic Hemi Ram Sputtering Fluttering Rough Idle I did a few plugs(not all) with the balance test and could not notice rpm drops. Make sure that base ignition timing is set properly. I've changed the idle control valve & it's still the same. Unscrew the 2 bolts attaching the IACV to the intake manifold. Re: Rough idle when truck is cold Hi. Rough Idle, Trys To. I stopped at the gas station for some provisions, and when I got in and started it up, the rough idle returned and the engine light came on. A couple weeks ago, it began to idle rough and is difficult to stay running 1st thing in the morning. The problem was very slight, but noticeable nonetheless. I did find something new though. I can let truck sit all day, starts & runs good. Remove the blue plug from the throttle body. Next stop light, checked the Scangauge No codes CEL would only flash when traveling above 40mph, which I thought was strange,. But once you give it some gas, it draws the fuel in builds up the needed pressure. I have a similar problem sometimes. got the new IAC valve installed, and i still have the rough idle. Check engine light and rough idle I washed my car yesterday and went to start it this morning and I could immediately feel the shaking and vibration as the tach was idling between 1K and 600 rpm. My brother borrowed it before I bought it and had it tuned up at the BMW dealer near his home in Kansas. Re: Rough idle when cold Oct 18 2012, 12:56pm Hey man you might want to check you'r timimg or timeing sensor or maybe you'r cam sensor. This morning when the truck was started, there was a nasty knock and rough idle. This morning (again temps in the low 50s), rough idle of the same magnitude, backed out and put in drive, same bucking, check engine light this time and the rotten egg small again. rough idle in the morning Discussion in 'Engine & Performance' started by bigwreck, Mar 13, 2010. It's generally located on the throttle body and in the case of my 2000 Dodge Ram 5. Rough idle & difficult to stay running in the morning. It feel like it almost stalls then the revs go up and the same happens repeatedly. The car runs great after start up, accelerating right away and smoothly. Rough idle? This is a discussion on Rough idle? within the RAM 1500 Diesel Mechanical forums, part of the RAM 1500 Diesel Garage - RAM 1500 Diesel Mechanics Corner category; So I was in the drive through this morning and thought I felt something odd. It will often die on me unless I feather the throttle. Bought from original owner, all stock parts, and never been to the dealer for any service other than fluids and filters. So far as the rough idle goes, (I cant say about the speedo) I'm going to hazard a guess you have a problem with the Idle Air Control Valve or some call it Idle Air Motor. A couple weeks ago, it began to idle rough and is difficult to stay running 1st thing in the morning. Morning all - with my 118tsi Golf - on start up after about 5-10secs it turns to a really rough idle, but is revving around 1100-1350rpm. Car starts rough when the engine is cold. rough idle in the morning and hard to start! Hey guys fairly new here and want to thank you all in advance for all the info I have found here. From a cold start, usually in the morning, the 1st 10-15 seconds run rough before settling down to idle. Then, as if by pure magic, it runs fine the rest of the day. Mine also idles rough at startup (when cold) and takes 15-20 seconds before it settles down. After the truck ran for several minutes, the enigne knock and roughness cleared up. What are some of the symptoms of the code? Symptoms of a P050D engine code may include:. There was some oil found on the coilpack when it was pulled out. Then idled at the same 800rpm. Guy with the 48 buick here (Matt). Define idle. I sure do need some professional advice, my 944 just had a new timing belt and runs great when its warmed up, but have noticed that the gas mileage is about 100 miles less to a tank, plus the idle in the morning is very rough until she gets warmed up. The idle will never be Lexus-smooth, I've been in enoguh W126 cars to know that M-Bs of that body style will never have Lexus-like idle. The engine was turning over very fast but she would not fire. , the idle should increase if you have a leak. My impression was that the valvetronic takes some time to initialize. Diesel Forum - TheDieselStop. It is a noticeable vibration or like I said, rough idle. Lately, it's been running a little rough at idle, such as at a stop light, with the RPM's "bouncing" up to 1200 or so for a second, then falling very low, to maybe 600-700 RPMs for a second at which point the engine is almost at stall speed. For the past week or so, Mini has a rough idle at cold start up (after sitting overnight). My car is running extremely rich and has a terribly rough idle with extreme hesitation when applying throttle. Only on cold starts (When the engine is cold that is) the engine idles rough and very low. I went to auto zone to see if it was a misfire but the scanner returned P0014 which could have been multiple things but the guy at the counter said most common is the cam position sensor. the common wisdom regarding the rough idle on cold start is the intake "O" rings. i have a 2004 ford f250 powerstroke 6. During initial startup my understanding is that the air intake is controlled by the throttle body (which is normally not used as air is controlled at the engine intake valves). Replaced temp, map and o2 sensors. When its first started up in the morning it doesn't really like to stay running, ESPECIALLY if its below 50 degrees outside. I just replaced the plugs about 3 months back and it ran fine after, people have told me things like it is the o2 sensors to the cat is plugged up to my fuel filter is bad. Once its warm it'll stay running and won't surge, but it still has that lumpy idle. Rough idle on cold Rough idle on cold morning's and when it rains (2002 Chevrolet Silverado 1500) What do I need to do, already replaced iat and mass airflow. Lastly, if you suspect the intake manifold gaskets are leaking, you can take a product like WD40 and spray it along the edge of the intake manifold while the engine is idling. rough idle and stalling This is a discussion on rough idle and stalling within the Ninja 650R Maintenance forums, part of the Kawasaki Ninja 650R category; I went for a ride this morning to a bike rally and the bike was perfectly fine. I am posting this to help people who have rough idle issues. How your engine idles is a good indicator of its overall health; addressing the problem sooner rather than later and checking all potential causes is important. Either it won't start for awhile or crank on it for awhile, runs rough, almost like not getting enough fuel and then is fine. The engine still idles very rough and shakes when below 1000rpm but seems to run smoother above 2000. After warms idles fine but stumbles when I hit 2k rpm or heading down freeway. When you put the vehicle in neutral, the idle smooths out like the day I drove it off the lot. Each morning, my truck started up without a rough idle at all. Then have the shop owner in the morning attach a code reader and start it and see if any codes come up. It feel like it almost stalls then the revs go up and the same happens repeatedly. Continue reading to diagnose why your Accord's engine is revving while it is parked. For faster and easier. 0 CR TDI (Engine code CBBB). Rough idle on cold Rough idle on cold morning's and when it rains (2002 Chevrolet Silverado 1500) What do I need to do, already replaced iat and mass airflow. Rough Idle Solved We traced it back to a bad fuel pump. After a few minutes it goes away. I bought the car with 20,000 miles and it has always run this way. My 85 olds delta 88 305, v-8, 4 barrel idles very rough when i first start the car after 24 hrs or so. on my way into my 48 hour shift at work, truck is idling really rough, almost to the point of stalling. About 3 months ago I started to experience rough idle in the morning. The roughness is more pronounced as the outside temperature gets colder. Hello, I recently purchased my first boat with a 93 Mercruiser 3. I don't know if low vacuum is the cause of the rough running, or the effect of it (rpm is around 500 in gear in the rough-running condition). Rough idle question, 2005 Passat TDI Got up this morning and the wagon started up with a very erratic idle. I changed my oil this morning, filled a tank of gas, and then drove around town running errands and grabbing some food. Voltage drops, rough idle, voltage returns, smooth idle. It seems to be loosing it's prime. I did the tune up with Bosch platinum iridium fusion (4 prong) #4505 plugs, Accel super coils #140032, and viton o-rings from Sno-Motion. Clarification: the vacuum readings I quoted above are from when the idle is behaving normally, in neutral at 750 rpm. Then idled at the same 800rpm. For the first time (9/09) since i started driving the car after sitting for 6 yrs it didnt idle very rough. A vacuum leak on a fuel injected engine will cause high idle. 9l gas engine, it's pretty easy to change and was fairly inexpensive. and if i drive it on the high way above 40mph before it is warm it shakes like crazy. 3l gdi engine When addressing a customer complaint of rough idle, which occurs only on the first start of the day and last s for 30-45 seconds, check for the possibility of poor injector performance in a particular cylinder. 147 hesitation & rough idle Need some help! For a few weeks my 147 2. Re: 99 civic rough idle Thanks for the input.