Questions tagged [rough-idle]

Questions about troubleshooting and solving rough idle problems

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4
votes
1answer
4k views

Engine's RPM drops right after start and after letting off the gas

Car in question is a 1993 Mazda Miata with 1.6 liter engine. Right after I start the engine the RPM drops below idle and the engine shakes a little bit but quickly recovers. After I give it a very ...
4
votes
1answer
2k 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
10k 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
3answers
61k views

Rough idle when AC is on

My Toyota Vitz 2007 idles roughly when AC is on. If AC is turned off, the idle becomes much smoother. This vibration is more visible if I suddenly stop in traffic. As soon as I stop, several rough ...
4
votes
2answers
2k 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 ...
4
votes
2answers
6k views

Should the EGR be activated at idle?

My 98 Mazda 626 2L ATX has a fully electronic EGR valve controlled by the ECU. I've been trying to figure out a rough idle problem for a long time, which gets worse when the engine is under load, ...
4
votes
2answers
31k 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
1answer
373 views

98 Mazda 626 GF 2L ATX zero ignition timing at idle?

My 1998 Mazda 626 GF 2L ATX has zero ignition timing at idle when fully warmed up causing a rough idle condition. I've replaced the faulty O2 sensor with no effect on the retarded timing and replaced ...
4
votes
2answers
5k views

Noisy Power Steering Pump on a Cold Start

I've occasionally noticed that on a cold start the power steering pump will be a bit noisy. I've only noticed it a few times over the past few years, but yesterday I was under the hood right after ...
4
votes
3answers
2k views

2005 Mazda 3 2.3L rough idle

My 2005 Mazda 3, 128,300 miles and manual transmission, has been running well for quite a while but a couple of weeks ago it started idling rough/low once warmed up and even stalled a few times when I ...
4
votes
1answer
527 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!
4
votes
1answer
23k 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
6k 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
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
votes
0answers
125 views

Engine running rough after spirited driving [closed]

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
90 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
votes
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 ...
4
votes
2answers
2k 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
2k 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
4k 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
2answers
2k views

What could be causing strange idling behaviour on twin carb motorbike?

I have a pretty old Varadero. It's a 125cc twin-carb v-twin. I open the choke to start it, it starts first time, warms up slowly (10-15 mins), then when I push the choke in, the idling doesn't really ...
3
votes
2answers
859 views

2006 Pontiac g6 rough idle and intermittent spongy brake and starting issue

I have a 2006 Pontiac G6 with 160k on the 3.5 motor. Around 155k the brake pedal went hard and spongy. Also, about 1 in every 40-50 times I start it cold, the starter will turn without a successful ...
3
votes
1answer
723 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
1answer
3k 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 ...
3
votes
2answers
485 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 ...
3
votes
2answers
1k views

Low idle while on Drive - Lexus LS430

Today I noticed something annoying on my 01 UL LS430, The RPM rate drops to around 500 when I set the transmission to "D" along with a slight vibration and strangely. If i change that to P, N. or even ...
3
votes
1answer
65 views

High Idle in Tata Manza, occasionaly

I have noticed that the diesel car idles high (1400-1600 RMP) in Idle. This is occasional and some times the engine check light comes on and goes off. scanned the system, but was not able to find ...
3
votes
1answer
36 views

03 ford expedition with a poor idle to start

Please can you tell me what else do I have to check to solve the problem.......because what I have done in my truck haven't helped. It does start the engine but after I try two or three times after ...
3
votes
2answers
329 views

1995 Chevrolet Blazer - Spits and sputters over 45 mph

When my truck idles it's smooth but when I get on road and the engine gets up to operating temperature it spits and sputters. When I pull into the driveway, it cuts off. I have replaced the fuel pump,...
3
votes
3answers
3k views

E46 rough idle with coolant light on

The car is 2001 BMW 330i. I have changed ignition coil, spark and IAC. Last week, my car experienced rough idle. Then I changed the coolant temp sensor today. After adding coolant and bleeding, the ...
3
votes
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
1answer
2k views

Slight vibration while idling

I just did a change oil and then change spark plugs (from normal copper to platinum if that matters) and high tension wires for my Protégé 2000 Mazda Automatic Transmission. Prior change my idling ...
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
1k views

Rough Idle & Stall While Stopped

Make: BMW Model: 535 IS Automatic Year: 1988 Miles: 230K I have a very similar problem to (Automatic: revs dropping then stalling when stopped at lights) The car is fine in just about every ...
2
votes
2answers
4k views

cause of Rough / fluctuating RPMs in low RPMs

It's not dying (hasn't yet) but when the car is idling or in low RPMs the car (Mazda Protege 5 2002) is fluctuating in RPMs. Also, the last start was rough. I've had issues with air intake before ...
2
votes
1answer
1k views

Is a +/- 10-15 rpm idle fluctuation normal?

98 Honda civic ex I'm curious if during idle, it's normal for the rpms to fluctuate 10-15 rpms +/- or if it's supposed to always be steady constantly? My OEM tach doesn't pick up this slight change ...
2
votes
2answers
2k views

Jeep stalls a lot has trouble idling after battery pulled for a long time?

I've had this a problem a lot with this vehicle. I have a 99 Jeep Wrangler TJ. I believe the car's computer has a battery that is a dead (like a watch battery). For some reason when it stalls or when ...
2
votes
1answer
1k 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 ...
2
votes
2answers
2k 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 $...
2
votes
3answers
2k views

Brand New 2018 Hyundai Sonata with rough idle

I have a brand spanking new 2018 Hyundai Sonata that as soon as I drove it off the lot I noticed it idles rough. Not horribly, but very noticeable. Not only do the RPM's drop a little but you can ...
2
votes
1answer
14k views

Black water from exhaust, cylinder misfire and rought idle

It is a Skoda Fabia 2006, petrol, 3cylinders 1.2L. Main problem: Rough idle. Misfire at random cylindners. Steam, Water and black carbon from exhaust. (I'm sure it is not normal). Undrivable. ...
2
votes
1answer
636 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 ...
2
votes
1answer
1k views

What can be the reason for rough idle after engine oil change on petrol cars?

I own a L12B Honda Fit/Jazz. I have never felt roughness at idle during my 6 months of ownership. I had oil change yesterday where they drained and filled Honda Recommended Synthetic Oil. My ideal ...
2
votes
1answer
2k views

2010 Nissan Sentra - Idling rough in reverse, occasionally stalls when stopping

Been having an issue with my 2010 Sentra where the idle in reverse is very rough and has very little power. As well when making abrupt stops in drive the car will occasionally stall, but start back ...
2
votes
1answer
1k views

Mazda 3 really bad idle related to fuel pump

My Mazda 3 has suddenly been having rough idle issues. I have noticed that since yesterday, when my car is in idle it revs from the idle rpm(not sure if its 700-850rpm) to 1000 rpm then back again ...
2
votes
1answer
338 views

Rough Idling in Citroen C4 [closed]

I have got a Citroen C4 1.6 litres petrol engine. I have been experiencing rough idling, engine vibration and also engine stalls when accelerating and it will pick up speed gradually. Does anyone have ...