Questions about troubleshooting and solving rough idle problems

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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 ...
2
votes
2answers
883 views

is there any way to adjust my idle speed - 2003 Cadillac CTS

My 2003 CTS vibrates pretty bad at idle speed (around 600 RPMs) But If I rev up to 800 or so, it's totally smooth. The real problem is partially due to worn motor mounts, but I dont want to spend ...
4
votes
0answers
60 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 ...
0
votes
2answers
3k views

Why does RPM jump between 1000 and 2000 at standstill (2002 Mercedes-Benz CLK 200 K)?

My car has a kind of a rough idle and it's like it gives a bit of gas, meter goes between 1000 and 2000 rpm at standstill. Same if I shift up to 1 or 2nd gear. If I then take it for a drive, car jerks ...
1
vote
1answer
100 views

BMW e46 problems after Lysol in air intake

I was spraying Lysol into the cabin air intake (not the engine intake) right under windshield wipers while running the fans, and after doing this for several minutes (fans on the whole time, Lysol ...
1
vote
1answer
132 views

Irregular Fuel Pressure and a Old Clogged Fuel Filter

I was reading this article on vapor lock regarding my intermittent hot weather idle problems, and was wondering if an old, clogged fuel filter could cause intermittent fuel pressure problems and put ...
2
votes
1answer
435 views

Rough idle in neutral

I have a 6-speed 2012 135i, and whenever I idle in neutral, the car vibrates and makes a noise that I can only describe as sort of a faint grinding sound (it doesn't actually sound as bad as that ...
3
votes
1answer
232 views

Engine Turns Over Gets to 500rpm, Shakes, Then Loses Power After Spark Plug & Wire Change

I drive a 1994 TOYT Camry LE 2.2L Coupe. A couple days ago while I was driving, I stopped at a stop light and my engine block started shaking the whole care at low speeds and idle. I replaced the ...
3
votes
2answers
533 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 ...
4
votes
9answers
20k 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 ...
3
votes
1answer
623 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 ...
1
vote
0answers
107 views

98 olds bravada sputters when it warms up [closed]

My 98 bravada is fine in the morning when I first start to drive it but after about 20 min or so it starts to sputter and also sputters while it's idling. Does this sound like it could be a plugged ...
1
vote
0answers
138 views

Missing/rough idle at fist start or when parked for over 4 hours [closed]

I have a 99 Honda Accord. It has a miss/rough idle when its parked for more than 4hrs maybe, but specially in the mornings. It's only at the first start, after that it runs normal. I have changed ...
2
votes
1answer
315 views

engine vibration under load

My 2009 Camry is doing the same thing, I put new motor mounts on, loosened them and re-tightened them and also cleaned the throttle body. Still have vibration coming from the engine. I have been told ...
3
votes
1answer
1k views

Small two-stroke engine runs poor

I have a borrowed cultivator (Echo TC-2100), and having hard time running it. It looks fairly new, and in good condition, but was possibly poorly stored and was not winterized. At first I could not ...
4
votes
3answers
3k 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 ...
1
vote
2answers
347 views

Vibrates in Idle

I have a 1999 RAV4 with 120,000 that's vibrating at Stops when in Drive, but not when in Neutral. Would it help long term if I used Neutral when stopped? OR should I start looking for another car? ...
0
votes
1answer
607 views

when i start my 1500 dodge ram rpm goes up and down in morning

When I start my Dodge Ram 1500 in the morning, the RPM goes up and down for about 4 times from 1000 to 2000 and it sounds like the truck is gonna shut off. It also has a check engine light on. Just ...
2
votes
1answer
476 views

1975 Honda XL 250 has erratic idle / high idle when it's cold out

As stated, I have a 1975 Honda XL 250. It has a 1 cylinder 250cc ~24hp carbureted engine. The problem I'm running into is an inconsistent idle. In general it seems to have a low idle (what I want it ...
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 ...
2
votes
1answer
597 views

1993 Mustang dies at idle in extremely cold weather

So we've had some mornings dipping down below 5deg F recently here in WI. The good: my stripped-down 1993 Mustang starts, can run, and drives just fine in this weather. This is the 2.3L N/A, with an ...
1
vote
2answers
357 views

Toyota manual transmission problem

I took my 2003 Toyota Matrix in to the dealership for service. It has 105,000 miles - the oxygen sensor needed replacing, but no other issues found. Now I feel as though I need to shift to a higher ...
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
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 ...
1
vote
2answers
1k views

Vehicle sputters on cold start on cold mornings

I have a 1998 Ford Explorer with really low miles (< 30,000 miles; classic "little old lady who only drove it to the grocery store once a week" type vehicle). The first time I start it on cold ...
4
votes
2answers
898 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.
1
vote
2answers
69 views

2001 Saturn L-200 replacing one tire

So, today I was driving and all of the sudden my front passenger tire blew out. I pull over to find out that I ran over some piece of metal and the tire is torn unrepairable. Luckily there was a tires ...
2
votes
1answer
6k views

Why is my car hesitating to accelerate only when I first start my car?

I've got a 1999 toyota corolla with over 170K miles, and I've had my fair share of problems over the years. Currently, I have this problem that my car seems to hesitate accelerating when I first ...
1
vote
1answer
1k views

BMW E30 uneven idle especially when cold

My '90 E30 with the six cylinder M20 engine idles unevenly, especially when the engine is cold. A local mechanic said the mixture seems to be too fat but had no concrete solution saying I have to live ...
2
votes
2answers
361 views

1991 Bonneville Idles Poorly When Stopped

Recently my '91 Bonneville has been having an issue with idling while stopped, which may or may not have coincided with Service Engine Soon light turning on. The main symptom is an overall drop in the ...