Questions about troubleshooting and solving rough idle problems

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5
votes
1answer
50 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
0answers
53 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
1answer
35 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 ...
8
votes
3answers
63 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 ...
6
votes
1answer
126 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
1answer
57 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 ...
3
votes
0answers
32 views

'90 alfa 164 V6 3.0 12v bad idle when hot / hard to start / bad rev under 2000 rpm

I am getting a bad idle when the engine aforementioned is warm. Can somebody please help me troubleshoot this problem ? Here are the parameters when the engine is idling rough Any help will be ...
5
votes
2answers
80 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 ...
11
votes
2answers
211 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 ...
3
votes
0answers
54 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 ...
7
votes
1answer
121 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 ...
2
votes
1answer
35 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 ...
3
votes
1answer
28 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 ...
4
votes
0answers
33 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 ...
5
votes
0answers
37 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 ...
8
votes
2answers
156 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 ...
6
votes
2answers
401 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 ...
2
votes
2answers
78 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 ...
4
votes
2answers
2k 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 ...
3
votes
1answer
88 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 ...
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 ...
0
votes
2answers
154 views

2006 Scion Tc Base - lots of vibration and bad smell from exhaust

2006 Scion Tc base automatic transmission, has 149k miles on it.The car used to vibrate a little at idle. It suddenly started vibrating a lot. It is shaking as if there's an earthquake! Idle rpm at ...
7
votes
2answers
131 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 ...
8
votes
2answers
913 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),(...
1
vote
1answer
86 views

How Does a Stuck Purge Solenoid Cause Problems

In the WSM for my car, it lists "purge solenoid valve malfunction" as a cause of both a low idle with excessive shaking and loss of power during acceleration. I'm wondering the exact mechanism / why /...
6
votes
1answer
473 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 ...
3
votes
0answers
168 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 ...
4
votes
2answers
298 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 ...
10
votes
1answer
362 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,...
6
votes
3answers
2k 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 ...
2
votes
1answer
37 views

Low idle and tacho twitching after electrical cut out

The car is a 93 VW Cabriolet (Mk1 Golf/Rabbit). I was parked with the engine on lowering the hydro/electric roof when the engine and power cut out. I couldn't restart the car so checked the battery ...
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
2answers
281 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
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
0answers
62 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
votes
2answers
183 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
185 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 ...
2
votes
2answers
528 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 ...
1
vote
1answer
102 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 ...
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 ...
3
votes
0answers
165 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 ...
1
vote
3answers
458 views

1998 Honda Accord V6 - Rough Idle/Stalling

My daughters accord idles really rough after driving it for about 10 minutes, but not as you are driving it, only when you stop. Then, when she stops, the car usually shuts off. It normally starts ...
0
votes
2answers
851 views

What will cause my Ford Expedition not to start?

I have a 1999 Ford Expedition. I was having trouble with it idling and now it won't start. What can cause this problem? Yesterday I was driving and had to double foot it to keep it idling. Every ...
1
vote
1answer
139 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
481 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
240 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 ...
9
votes
1answer
788 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 ...
6
votes
4answers
11k 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 ...
4
votes
1answer
696 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 ...
3
votes
2answers
568 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 ...