[Klutch]

Sometimes at idle I am experiencing a 50-75rpm fluctuation. Doesn't do it a lot, but when I stop the truck and put it in park and let it idle for 10sec. and then it will fluctuate for 5sec. then smooth out. Running higher fuel pressure seems to help, and it will just randomly do it. Any ideas or is it nothing to worry about. /ubbthreads/images/graemlins/shrug.gif

 

[Klutch]

Anyone?

 

[Kanman]

When is the last time you changed your fuel filter? Also, I would look for boost and or vacuum leaks.

 

[lildevil02]

check your fuel filter and make sure the drian plug is closed

 

[ponyboychris]

Mine stumbled slightly when I first bought it like you are describing. I had a loose IC clamp on the cold air side. Cranked it down and it went away.

 

[Klutch]

Thanks for the info. I've talked with Jody and he thinks it's programming. Says it's some times is hard to nail down the idle trying to hunt for where it should be with hybrid/singles unless you do live programming. But I will check the things you've mentioned,thanks again.