Rough idle and rough running only when cold?
Cold start: low, rough idle then is normal after a few seconds
How does it run at high rpm when it's hot? Any sputter or misfire? I would suspect the plugs, pull and inspect them, don't just assume because ...
Rough idle on cold start. - F150 Ecoboost Forum
A rough idle can be caused by (CAC) charge air cooler leaks. Also check that crankcase oil is not overfilled as a rough idle can result.
Rough Idle When Cold | Ford Escape Automobiles Forum
this idle problem is from the lower intake gasket not the upper but lower intake. it only smooths out when it warms up due to the fact the oring ...
Rough idle when cold - The Forum - W116.org
? Might be time to recheck the WUR operation and fuel pressures? AAV could be the culprit yes. At full cold it must be completely open. Unlikely ...
Cold rough idle - BMW X5 and X6 Forum (F15/F16)
Your injectors are dying. You need to leave the car at the dealership overnight and have them check for the injector corrections at the cold ...
Rough idle only when cold - Full Size Ford Bronco Forum
When this happens I gotta hold my foot on the throttle to keep it up until the engine warms... other times. Its just a rough idle and stays ...
A different G37 rough running when cold problem - MyG37
Rough idle / running could be vacuum leak, bad electronics. Or even the VVT not behaving correctly. Though the latter would almost definitely ...
Rough Idle when Cold | TCCoA Forums
Although, running SeaFoam through the system gave great results and showed that it has to do with the intake system and the injectors as well as ...
Car rough idle and stuttering - but only when cold - BMW 1 Series ...
Injectors and HPFP are a possibility, but why would everything work perfectly once warm? I do not experience any long cranks even when cold by ...
Rough idle at cold start...HELP! - Mustang Evolution Forum
You might try cleaning your MAF sensor. I had the exact same problem you described. Started after I washed and re-oiled my airfilter. Cleaned ...
Rough idle 30 sec after cold start - Hexheads - BMWSportTouring
When cold a messy spray pattern would be hard to ignite, and would make a rough running engine. Now, I'm not a BMW mechanic, or know much about ...
Rough idle when cold...smooth when warm..? - MBWorld.org Forums
This should help, at the mileage you have the injectors become gummed up and the atomization of the fuel is not perfect and will sometimes ...
Rough idle when cold, help! - LS1TECH - Camaro and Firebird ...
Well after first start when the car is cold it is in open loop and it isn't using the o2 sensors yet. Once it warms up and switches to closed ...
Rough idle when engine is cold
This only last for a few minutes and then the engines runs smooth. The engine light is not on and I'm not getting any codes. What could this ...
Rough idle when cold - AcuraZine - Acura Enthusiast Community
The problem with this car is when is cold when I start the car it runs rough it's misfiring in all cylinders but when it warms up it gets much better.
Rough idle on cold start | Drive Accord Honda Forums
So during the warm up transition you are feeling the engine because the cold engine needs the higher rpm but the mounts are in the stiff mode.
2003 5.4 Rough idle ONLY on cold start (misfire on 2 & 4)
The minor short misfire on after sitting is a classic minor head gasket symptom. a few drops of coolant have leaked into cyl. Or intake runner.
Rough idle on cold start | Ford Explorer Forums
The engine runs poorly while cold and idling especially. Its lost some power for sure and only has 133000 on it. While driving on the highway i ...
Finally! Hesitation and rough cold start fixed!
1. Rough idle on cold start. Only happens if the car was sitting overnight. After about 10 seconds it would smooth out perfectly. 2. I have always felt low RPM ...
Blue Smoke and Rough Idle on Cold Start, then car runs great
Since your problem occurs only when cold, AND involves rough idle, I'd be strongly inclined to suspect the fuel situation as your issue.