Since my engine has been put back together, I have had some idle problems (idles fine for awhile, then rpms lower and it dies). Also from time to time it stumbles and almost bucks at low rpms. Any ideas? Besides that though, it runs like a monster with JLP's stage II cams and ported heads.

Thanks,
Mark

 

IAC

 

Fuel Filter

 

My thought as well ....how many miles do you have on your truck?

 

It's got 20k on it, but the engine only has 5k. The fuel filter is new.

Thanks,
Mark

 

I would say clean your IAC valve it's on the passenger side of the supercharger plenum. It has a plug and a large vacuum line coming off of it. It effects , idle, gas milage, and boost.

Any way its a starting point.


Suavy

 

yes IAC, I had symptoms like this and lubricating and cleaning the IAC fixed it. Hope the problem ends up being that easy. Good luck.

 

What procedure did you guys use to clean the IAC?

Thanks,
Mark

 

Pulled it off
Can of carb cleaner
Spray the chit out of it
Put it back on

 

Your cam timming might be off. Mine had symptoms like that and one head was off just one link on the timming.