Small Idle Problem

[skunky26]

I have a 99 Ford Expedition with a 5.4L & when its in park just runing the RPM Needle moves up & down just alittle tiny bit & u can feel it sitting down in the driver seat. This Truck had a full Tune UP Not sure what can be causeing this problem. It has power & does not die out or anything can anyone give me a hint what it can be.

 

[monsta]

Originally posted by skunky26
can anyone give me a hint what it can be.

Normal.

Mine does it ever so slight, my V10 did it and others I hear do it.

If it doesn't affect performance then I wouldn't worry too much about it.

 

[3 NAILS 1 CROSS]

try some fuel injector cleaner ,sounds like you have an irregular fuel mixture going through the intake.

 

[rwinch]

If you do use a Fuel Injector/Gas System cleaner, don't get those popular fancy packed cleaners, use Seafoam brand products:

http://www.seafoamsales.com/motorTuneUp.htm

This product rocks!