Questions about troubleshooting and solving rough idle problems

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11
votes
2answers
229 views

Rough idle @ stoplights - O2 sensors reading zero voltage

I have an '05 4.7L Dodge Dakota that has had an issue with rough idle for over a year now. It seems to only happen after coming to a stop at a traffic light. It seems to happen more often after having ...
11
votes
2answers
401 views

2001 Infiniti QX4 rough idle - leaking fuel damper vacuum port

I have a bit of an involved problem, so I’ll break it down a bit and try to provide as much detail as possible. My main problem: I have a rough idle on my 2001 Infiniti QX4. It’s not extremely rough,...
9
votes
1answer
857 views

Idling issues on 1995 Kawasaki ZZR600

The bike was running rough and could not get a constant idle speed. I checked the air filter and it was pretty well shot (contamination, etc.). As I awaited delivery of the new air filter, as a test I ...
8
votes
4answers
21k views

2009 Toyota Camry 2AZFE idle vibration remains after new motor mounts

My wife's Camry went in to the shop 2 months ago for a rough idle. We bought the car used in February with 72K miles. We've put on 10K and decided to have a mechanic look it over and tell us what it ...
8
votes
2answers
160 views

Is it healthy to drive with a bad IAC? [closed]

My IAC is bad and in order to keep my car running while a stop sign/light is to have one foot on the brake and one foot on the gas. Is this an effective fix to travel until I get it fixed? Or ...
8
votes
3answers
65 views

My BMW 325xi smells like gas

It is difficult to start my BMW it runs rough and smells like raw gas from the exhaust pipe. My check engine light is on. What could be the problem? I just had the engine replaced I am over 8,000 ...
8
votes
2answers
1k views

My Ignition Timing is Retarded, no seriously, it's really screwed up

I logged some test data to try and help me figure out why my 98 Mazda 626 GF 2L ATX has a rough idle and is suffering from hesitation. (Speed k/h),(TPS_v),(MAF g/sec),(RPM),(SparkAdvance),(...
7
votes
1answer
63 views

2015 Honda Mobilio - Car shakes when started

I have a 2015 Honda Mobilio with a manual transmission. I have had this car for 6 months and have not experienced any problems until yesterday morning. When I start my car, the engine shakes badly. ...
7
votes
1answer
179 views

Engine hesitates and stalls when warm

My car is a Toyota Vitz 2007 and it has 80k KM on it. I usually drive short trips (about 5km) most of the time in a low traffic road. Car drives mostly fine in these short trips. But, if I drive for ...
7
votes
2answers
134 views

02 Mustang GT 4.6

I was on my way to work and car started to run rough stumble and check engine light started to flash. Immediately turned around limped home about 3 miles. Changed plugs and swapped some old coils ...
6
votes
2answers
462 views

2005 Honda Accord 4cyl revving idle when warm

My 2005 Honda Accord I4 is idling fine when cold but once warm it begins "revving" on its own between 1200-2000RPM at about 0.5Hz. The vehicle initially threw a DTC P0507 ("Idle Air Control System RPM ...
6
votes
2answers
33k views

RPM fluctuation while idling

I have a 2003 Ford Explorer that hasn't been idling well lately. It normally idles around 800 or 900 rpms, but lately it will slow down to 400 or 500, then burst up to 1100 and repeat the process ...
6
votes
1answer
154 views

Startup problems: low idle RPM and stall on pressing the accelerator

My sister has a nice first generation Nissan Micra 4-speed automatic (I think it's the naturally aspirated, non-electronic carburetor version) . However, when starting it from a cold start (not ...
6
votes
3answers
4k views

Rough Low Idle and Engine Shakes, Hesitation and Lack of Power

On a 98 Mazda 626 GF 2L I'm working on the engine seems to shake / wobble for about a second / second and a half when going to WOT from any starting rpm. It also almost sounded like maybe one of the ...
6
votes
3answers
11k views

2000 Ford Focus, low idle, stalling at lights, white smoke from exhaust - P0171 Code - problem?

I have a couple of issues which I hope are all related. The car is a petrol Ford Focus 2000 1.8. Seems to be listed as LX, but the engine is Zetec. When stationary, the idle is quite jumpy, and the ...
6
votes
1answer
63 views

08 Silverado 5.3 rough idle and dark cold start exhaust

I recently bought a 2008 Silverado 5.3 with 77k on it. After a couple weeks I noticed that at idle the engine would stumble and my rpms would drop slightly. It eventually set off the check engine ...
6
votes
1answer
64 views

2004 Tahoe Conking, Glub Glub Glub

My 2004 Tahoe is not running well and conked out on me the other day. I just had it repaired for some other reasons and the repair shop suggested we needed to have spark plugs replaced so it will run ...
6
votes
1answer
603 views

Citroen C4 - Poor idle and low rev performance?

I have a Citroen C4 1.4 with 1360cc 16V KFU / ET3J4 petrol engine with 120.000 km. This problem appeared 3 - 4 years ago at around 40.000 km. When the engine is cold / hot there is a flat spot ...
6
votes
4answers
12k views

Car turns off due to low RPM, only when starting car

Background: I had my 2003 Infiniti g35 at the mechanic to fix an electrical problem (turns out remote starter wires were rubbing and causing a short) and to fix an oil leak. All in all they changed ...
6
votes
1answer
241 views

Why does my engine vibrate at idle only when I have the AC on?

2001 Honda Civic EX First noticed this problem when I got the car about a year ago. When the car is idling without the AC on, all is good. When I turn the AC and the clutch engages, it begins to ...
6
votes
0answers
41 views

Ford F-150 4x2 4.9l straight 6 misses after lots of work

Just seems like plug wire, plug, or something missing shakes whole truck. It's acting like it's starving for gas. New plugs, plug wires, MAF sensor, idle control sensor, cleaned and still can't figure ...
5
votes
11answers
48k views

Honda Accord 2000 V6 intermitently stalls when idling after start. What may cause it?

I have 2000 Honda Accord V6 with 140K miles and which is very well maintained and runs really nicely. However, every once in a while when I start it it would do some erratic rpm changes on idle and ...
5
votes
10answers
21k views

1999 Mazda 626 Shakes when Idle

I've got a 1999 Mazda 626 that shakes really badly when idling. It gets a little better when put into neutral, but not much. I've had two people suggest possibilities: Fuel filter Vacuum hose ...
5
votes
4answers
2k views

RPM bouncing when in idle, especially when AC in switched on

I have a diesel common-rail 1.5l engined car. Lately I am facing an issue where the RPM needle is bouncing in the tachometer when the car is idling. The normal idling RPM is around 820. When idling, I ...
5
votes
4answers
13k views

Car dying at low RPM only after filling up with gas

My question is closely related to one about a Jag dying at low RPM, but is slightly different because it only occurs after refueling and because the problem persists after cleaning the throttle body, ...
5
votes
2answers
58 views

Rough idle + slow acceleration + engine dying after spark plug change

I recently changed the spark plugs and wires on my 2002 Ford Focus SE with Zetec (DOHC) engine. I used NGK TR5IX (7397-4PK) Iridium IX plugs and Motorcraft wires. When I received the plugs, they were ...
5
votes
2answers
3k views

How to trigger an idle throttle position re-learn?

My Toyota Vitz 2007 idles roughly and I got advice to clean the throttle body and make the vehicle re-learn the idle by starting the engine and let it idle for some time. My question is, is it ...
5
votes
2answers
84 views

Emissions Problem: Lambda AND CO Slightly High on my 98 Mazda 626

I just took my 98 Mazda 626 for it's inspection and they said the carbon monoxide is slightly high. The test is done using a tail pipe gas analyzer while holding the RPMs between 2500 - 2800 for ...
5
votes
2answers
321 views

Why is my Chevy 2008 Cobalt not acting as though it's getting enough fuel and reading “cylinder 4 misfire?”

I have a Chevrolet 2008 Cobalt (LS) that I've had for about 7 years. No sooner do I have this thing payed off, when it starts giving me the following problem (I've never had any trouble with it ...
5
votes
1answer
23 views

Idle doesn't hold on 2006 Toyota pick up truck after giving a jump, actually failing to give a jump.

We have a 2006 toyota pick up truck and a 2000 mustang with a dead battery. Cable's have been Properly connected. 1, I can get no current flow, no jump from the toyota, yet it starts the pick up ...
5
votes
1answer
58 views

Why did my Kymko 50cc Agility Scooter suddenly stop running?

I have a brand new Kymco 50cc scooter and all of a sudden it won't stay running. I found 3 hoses that go nowhere, is this normal? I think my ex cut the hoses...hope I'm wrong!
5
votes
1answer
2k views

Automatic: revs dropping then stalling when stopped at lights

Kia Sedona 2012 automatic. Drove 180 miles on a full tank of fuel without any problems. Started the car the next day and it didn't start cleanly but did eventually. Was waiting on the drive with the ...
5
votes
1answer
1k 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. For roughly a month now, I'...
4
votes
2answers
918 views

1998 Ford Ranger surges when idling

What should I be looking at to diagnose my Ford Ranger which surges when stopped? This typically only happens while the vehicle is warming up. After that, it's fine.
4
votes
1answer
815 views

Engine sputtering, not accelerating. Left for 20 mins and is now fine?

The car is a Mk1 Golf (1993, 1.8lt, mechanical injection). I was driving up a medium incline and suddenly my car starting sputtering and I lost acceleration. I pulled over and started the engine ...
4
votes
3answers
4k views

Engine idles badly and loudly when I switch on the A/C

The engine of my 1984 Toyota Carina AA60 works great when idling without the air conditioner running, but immediately after switching it on, it idles very badly, and a big noise starts up. If I move ...
4
votes
1answer
3k views

2003 Yukon XL 1500 5.3L Very rough, unstable idle on cold starts

When I say rough I mean like bad 70s carbureted motor rough. I've never seen an injected motor this rough during warm up. On the coldest days, it can even die out on me. The problem has only popped up ...
4
votes
2answers
2k views

What is an acceptable amount of up/down play in a distributor shaft?

1995 Chevy S-10 Blazer - 4.3 L Vortec V6 (vin W with PCM) - This is the distributor style with vertical cap posts. 230,000 miles original owner. EDIT: Please click on link below to see a photo ...
4
votes
1answer
12k views

Hard shuttering and engine dies when A/C is on at idle

When the car is idling and the A/C is turned the engine will shutter hard and/or turn off. I've already replaced the IAC valve; it was working for a little, but now it's back to shutting off. The ...
4
votes
2answers
343 views

2005 Honda Accord 4cyl low idle and stalling when warm

Yesterday my 2005 Honda Accord was running at a low idle when cold and stalling out when warm. Today I resolved the issue but I'm not sure what exactly I did that resolved it or what the original ...
4
votes
1answer
42 views

Car sounds and feels like wants to shut off

2000 Mercury Grand Marquis ....... My car sounds and feels like wants to shut off. It started yesterday - I was leaving a friends house and was about 2 lights away from home when i felt this weird ...
4
votes
5answers
3k views

2004 Mercury Sable -Trouble with starting and stalling

I've had my car in and out of the shop for several weeks and I'm really becoming very frustrated. I don't really know ANYTHING about cars, but about a month ago the car would sporadically have ...
4
votes
1answer
2k views

'98 Camry has occasional rough running / low speed idle problem

My '98 Camry (with the four-cylinder engine) usually starts, idles and drives like a dream. About a year ago I had the entire exhaust system replaced (including cat) due to corrosion. Since then it's ...
4
votes
0answers
57 views

Engine running rough after spirited driving

My car is a 2003 Chevy Impala 3.4L, with just over 200,000mi on it. I've checked the oil, it hadn't been on the road in about a month. My wife and I had a race a few days ago with her in the Impala ...
4
votes
0answers
34 views

1998 Mazda 626 LX

I have a 98 Mazda 626 LX. About a month ago it suddenly was shaking really bad took it to Midas for the check engine they told me it needed a fuel flush, trotted body cleaning, and fuel system flush ...
4
votes
0answers
64 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 ...
4
votes
2answers
1k views

Ford Escape 2002 idling rough in cold weather

Last week my 2002 Ford Escape started idling rough when the temperature was in the 30-40°F (-1°C to 4°C) range. It also seemed to have trouble shifting or something at 40-45 mph. I'd describe it as a ...
3
votes
2answers
34 views

Idling problems on 2004 Ford Mustang 4.6L V8

Need some help. I recently bought an '04 Mustang but am having idling problems. I've looked up some things on the Web but they didn't do anything for me. I've clean the IAC and it helped some but not ...
3
votes
2answers
601 views

BMW e36 wont maintain idle

A friend has an e36 that wont maintain idle. The car is driveable but coughs and stops when idling. I've checked the air box and boot and they are in good condition - no leaks. I think spark and ...
3
votes
1answer
30 views

Mitsubishi eclipse convertible 2008 shaking problem

I have a Mitsubishi Eclipse 2008 has 96,000 mile . When I drive, it doesn't really shake but when I stop at red light and the Geralyn drive it shakes a lot I have checked all the engine mount and the ...