Questions tagged [rough-idle]

Questions about troubleshooting and solving rough idle problems

49 questions with no upvoted or accepted answers
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2answers
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ford focus 2002 low idle problem varying

I have a ford focus 2002. It has an idle problem. At a stop the idle will vary from normal down to about 500 RPM, almost stalling. It does this variation very cyclically, every 5 seconds or so. ...
5
votes
1answer
2k views

2001 Mercury Sable — Rough Idle/High RPM and Transmission Leaks

I have a 2001 Mercury Sable (24V DOHC V6) that has been having problems with its vacuum system. I live in Florida where the average temperature lately has been in the 80s. I've been experiencing a ...
4
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0answers
148 views

engine runs rough for ~1 min, then starts ticking for a couple minutes, then fine

Vehicle: 2003 Kia Sorento, 193k miles It started ticking 3 weeks ago while the wife was driving. I test drove it, and the ticking quieted down to no tick over the day to and from work. I drove it ...
4
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0answers
91 views

1998 Mazda 626 LX with CEL and rough idle

I have a '98 Mazda 626 LX. About a month ago it suddenly started shaking really badly, so I took it to Midas for them to check the engine. They told me it needed a fuel flush, throttle body cleaning, ...
4
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0answers
134 views

2008 2AZ-FE rougher, throatier idle; and growl on heavy accel out of sharp turn

I have a MT Scion TC. Key detail on the heavy acceleration out of sharp turn is this usually only happens when I've been engine braking into the turn, and not every time. I'm not certain on the ...
3
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0answers
85 views

2011 Chevy Impala was inactive with dead battery for 3 months! I have tons of problems now! Help!

In late December 2017, I discovered my 2011 Impala wouldn’t start. My boyfriend and I jumped it with our other vehicle and it worked. We disconnected the cables and left it running for a while. We ...
3
votes
2answers
3k views

vw jetta 2008 starting problem - idle problem

I have a VW Jetta 1.4tsi 122 (2008) and it has a strange behavior. First of all, a have noticed that it doesn’t keep the same rpm when runs on idle. For example, when I stop at the first traffic ...
3
votes
0answers
2k views

What could be making my truck skip?

I have a 2006 Chevy Silverado 1500. It's been skipping for several weeks now but not really throwing a code. I've changed the fuel pump and spark plugs but still skipped. Then I came out one day and ...
3
votes
0answers
499 views

Light shudder on idle speed

I have a 2003 Golf 1.9 TDI pd 100 with 120,000 on the clock. When I have the engine running at idle , after a about 30sec to a minute, it starts to shake a little, like as if an injector is not ...
3
votes
0answers
566 views

Performing a Cylinder Power Balance Test

In the course of trying to diagnose a hot weather rough idle / stalling problem ( which doesn't occur in winter weather ) on my 97 Mazda 323 I performed a cylinder power balance test eye balling the ...
2
votes
1answer
25 views

I have a 2016 Hyundai accent sport, car dies when it's idling and the A/C is on

The car runs fine otherwise, just shutters and dies if the A/C is on and I'm idling. I put in new plugs and a purge valve, but the check engine light keeps going on and off over the past year. I ...
2
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0answers
53 views

2007 Toyota Corolla - Erratic Idling at traffic lights

Does anybody have any insight as to why this may be happening? My car stalled and refused to turn on one day while I was at a light, so I had it towed to my mechanic (whom I trust and has been doing ...
2
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0answers
121 views

How stable should the camshaft frequency be?

I just got my first oscilloscope ( Hantek 1008C ) and I was looking at the camshaft signal on my 98 Mazda 626 GF 2L. It uses a two wire sensor. There is a single bump on the face of the camshaft ...
2
votes
0answers
174 views

2005 Saturn Ion running rough after running for 30 minutes

My 2005 Saturn Ion starts and runs great for about 30 minutes or so, then it starts running rough like the mixture is too rich. I have to let it sit for an hour or two and then it cranks and runs ...
2
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0answers
35 views

2002 Nissan Quest breaking down

I was given the vehicle after it had sat for over 7 months. It sat with 3/4-1/2 a tank of gas. It was not cranked once. It is now idling and running very rough. It doesn't want to accelerate and when ...
2
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0answers
457 views

Subaru Legacy 91 idle issues

Video going over issues: http://webm.land/media/8vlo.webm Started having issues a while ago with some fairly extreme shaking and surging while at idle (including cold starts). To try and resolve this ...
2
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0answers
143 views

1973 F100 360 FE 5.9L Stalls when put in gear

I've got a 73 F100 with a 360 FE and a C6 transmission. It idles fine but stalls when put in gear, with somewhat of a jump. New holley carb on it. Any idea why? I've also notice the idle speed going ...
2
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0answers
2k views

Sudden Random Misfire and Stalling RX300

Preface: This is my sister's car, so I was not there at the moments leading up to it misfiring and stalling, but I'm the one who gets to fix it. It's a '99 Lexus RX300, and about a month ago I ...
2
votes
0answers
891 views

Car engine stutters when hot, and sometimes stalls

My car (Suzuki Swift 1999, engine G10A 1.0) stutters and jerks when hot, after driving for like 10 to 15 minutes the problem arise. The strange thing is that when this happens and i turn off the ...
2
votes
0answers
174 views

2007 Mercury Mariner - Car is shaking and whining.

Today my car starting shaking and whining very badly, but only when I'm stopped and the car is in drive. If I put it in park or neutral the vibration stops. The shaking stops as soon as I start to ...
1
vote
0answers
26 views

Rough idle in Ford Capri mk2 1977 V6 with Solex carburetor

I know internet is filled with questions like this but I'm out of options so I turned into stackexchange as a great source of knowledge. So my old green capri has the rough idle. Car data: Ford ...
1
vote
1answer
28 views

Rough idle or slight miss at idle in relation to purge valve

I'm working on a 2006 Chrysler 300, with the 2.7L v6 (the internal water pump one). I just replaced the EGR valve due to a P0404 and surging while driving (verified with a scan tool the EGR valve ...
1
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0answers
72 views

I have a P0172 code Ford Focus, 2005- then I did a freeze frame; what does the following data mean?

My ford focus 2005, Zx3 has been acting up running real rough turning off from time to time, I bought an OBD2 scanner and the P0172 code came up. I changed the fuel filter and the car ran good for ...
1
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0answers
33 views

2006 Honda fit erratic idle and vibration when engine is cold and performance problems

I have a 2006 honda fit with a 1.3L i-dsi engine and an automatic transmission. The car starts up ok even if the engine is cold but when i shift it to drive (when cold) the rpm just jumps up and down ...
1
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0answers
83 views

2012 Ford Fusion Idling Rough

So I got my Fusion about 4 years ago and for about 2 and a half to 3 years, I've been having an issue where it will idle pretty roughly at stop lights and such. However, it RARELY does it at the first ...
1
vote
3answers
950 views

Corolla idle fluctuation and noise

This is a 2009 1.8 Corolla with 150k km on the 2ZR-FE engine. At idle RPM's cycle up and down by one or two hundred RPM and there is a gasping or rotational noise from the right hand (belt) side of ...
1
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0answers
89 views

Volvo XC60 T6 Petrol+LPG rough idle

I have a problem with 2012 XC60 T6+LPG. Engine is idling roughly, especially when cold. Coil packs are Ok. There is no noticeable vacuum leak in the intake. I can't safely rule out fuel supply ...
1
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0answers
33 views

93 Honda Civic LX - fluctuating revs, poor running

My Civic has done ~246,000 miles and is now running very poorly. While driving down Interstate Car bogs down stalls out and there's smoke from front and back. Spark plugs are fouled out and when ...
1
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0answers
29 views

Engine not rev over 3500 after new ECU installed same number

I have Honda civic vtec 1999 with D15 engine installed. ECU/PCM reporting error and mechanic told me this computing having issue in IC I bought new ECU same number but after connecting, car engine ...
1
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0answers
47 views

Does MAF has something to do with rough idle?

I am trying to solve my cars long issue in idles again. Cleaning the ICV did the trick before but it keeps coming back and I don't know what else to check. Here's the link in my previous question. ...
1
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0answers
18 views

Low idle after adding gasoline

This has happened twice now. My 2000 toyota sienna runs fine until I went to add gasoline. Upon startup, my idle was immediately much lower. I can rev throttle and it sounds smoothly until I release ...
1
vote
1answer
12k views

Engine revs up when in park

I have a 2001 Saturn SC2, and occasionally when I put it in park after driving, it will rev up at a steady pace and just keep raising up the rpm, it does not stop unless I either put it back in drive (...
1
vote
0answers
177 views

rpm's drop when stopped

2000 SOHC automatic ford focus...new plugs wires coil pack oxygen sensor...IAC cleaned throttle sprayed with cleaner and seafoam used.....EGR checked. Car runs perfect except when I stop at lights (...
1
vote
1answer
6k views

sudden extreme rough idle, no codes but several recent issues

I've suddenly had issues with my car, a 97 Maxima, over the last week. No issues at all before these events. First, last thursday a coil went bad which produced #2 cylinder misfire and ignition ...
1
vote
0answers
844 views

Intermittent low idling 2007 Civic

First time posting. Got an intermittent low and rough idle on my 2007 Honda Civic LX. Will generally only idle low and rough for a stop light or 2 then things will relatively go back to normal. I've ...
1
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0answers
594 views

honda crv 98 idle too low and rough and eventual stall but ok when driving

(Excuse my english) My dad gave me a '98 honda crv. since it came from being serviced after an oil pump failure, it has no power when it's cold I have to press the gas until the engine warms up. I ...
1
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0answers
91 views

Jeep Grand Cherokee 1996 limited model - lack of power while sudden accelerating

Hi I have Jeep Grand Cherokee 1996 limited model - the problem is engine misfire in idle while cold starting and engine stady (not fully stady) after become hot, and lack of power while we accelerat ...
1
vote
0answers
263 views

2003 Mercedes Benz C320 Having ROUGH IDLE issues

Aloha, I just had the spark plugs changed yet the ROUGH IDLE is still there. Is this a Misfire? Don't know a thing 'bout cars. Asked the owner who said he must ask the mechanic to see if the cylinder ...
1
vote
0answers
127 views

Rpm falls below idle when declutching at high rpm

I've got this problem that I can't find the cause of. When starting the engine, which goes very easily, it idles smoothly and stable, rising the rpm a bit still gives no problems. But when driving at ...
1
vote
0answers
660 views

Chevy Silverado Fuel Pressure Is Erratic With Rough Idle Only When In Gear

I have a Chevy Silverado 2500 with the 6.0L engine and it has been idling rough. When I put it in gear the RPMs start fluctuating and the truck wants to stall out. Once the truck is running down the ...
0
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0answers
24 views

Unsteady RPM when ac is on

Hi guys I have a 2019 Lexus GX460 with a mileage around 8000. Recently I noticed that whenever I turn the ac on in idle, the rpm went up and down every few seconds with loud noises from the engine bay,...
0
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0answers
16 views

Alternator going out or Power steering…?

Got a 2009 Honda Accord that's been idling a little rough and shuddering/vibrating. When I turn the steering wheel, RPMs quickly jump from 500 - 1100 and then quick drop down and car sputters like it ...
0
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0answers
19 views

Posibly Wrong Spark plug gap?

So this is an update on my last question, the comments were a mess and I was new to the site I have a 1985 nissan 300zx vg30e and I just changed the spark plugs and its idling really rough and at ...
0
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0answers
26 views

What causes a vehicle to idle so low that it stalls?

My 2003 Mazda tribute is idling extremely low and shuts it self off when stopped for longer than a 30-45 seconds. There is no check engine or anything but I ran a I/M test and it showed these problems:...
0
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0answers
67 views

Erratic/Unrhythmic idling sound

This is a Suzuki Ritz (Splash) 2011 DDIS Diesel car. When the car is started fresh in the morning, the idling sound is not rhythmic. It varies its slow-speed, say every other second. I have uploaded ...
0
votes
1answer
36 views

Idle speed connector issues?

My car idle speed actuator connector has 3 pins. Disconnected the plug from the actuator, and key at on position, and each pins are individually grounded with multimeter, the multimeter reads 12.60 v ...
0
votes
1answer
84 views

2018 Toyota Camry - Loud Idle When AC is On

I have a 2018 Camry (less than 5K miles), and when it's in gear with my foot on the brake, it has a loud idle. The first time I heard it I was in line at a McD's and I thought to myself, "I hope that ...
0
votes
1answer
192 views

2018 Sonata Idle issue

I have a 2018 Sonata that has started to have a rough idle at times when in drive, stopped and with no HVAC on. I had to dealer, they stated there was a misfire and changed one plug and coil. This ...
0
votes
1answer
368 views

My Toyota corolla 2008 Rough idle.

My Toyota corolla 2008 is idling rough when I on AC, but when the car is moving everything becomes fine. I just replaced a clean intake manifold. What could be the problem? Any idea plz.