Erratic Idle When Cold
#1
Erratic Idle When Cold
08 GT 190,000 miles. What is with this erratic/searching/stumbling idle I get at cold start up, but runs fine when warm? New Motorcraft plugs, everything else, original stock. Did it before I changed the plugs.
#2
6th Gear Member
Could be a number of things. I always start with the simple stuff: clean the TB, clean the MAF, run a tank or 2 of SeaFoam.
Are you stock? If not and you're tuned, have you swapped tunes to see if it continues?
Are you stock? If not and you're tuned, have you swapped tunes to see if it continues?
#3
Simple Diablo Predator 93 octane tune. Also, I don't get the concept of a dirty TB and only doing it when cold. Just cleaned the MAF. Are there sensors that read the coolant temp and communication that to the ECM?
Last edited by rocky321; 10-04-2014 at 11:48 AM.
#4
#5
When it fails it will read all the way hot or nothing at all. At least that's what I found when mine failed. My sensor didn't fail, it was the wire going to it.
#6
When you clean the TB, make sure you remove it and use lint-free rags.... The PCV system has so much blow-by it's disgusting... It was worse with the supercharger, hence why I went to breathers.... 3k miles now and no oil buildup on the valve covers (yet)
Thread
Thread Starter
Forum
Replies
Last Post