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My 98 c-5 has a rough idle at times. When the
engine warms up or after driving hard it gets worse.
Does anyone know what that is and how to fix it?
Help.
My 1998 does the same thing randomly. Wires, plugs, pcv and filters all done and it still has a slight lope at an idle at times. Quarter mile times are fine as well as fuel economy and zero oil consumption between changes. When I change the cam it will have a reason to lope!
Same here. My idle feels like I have a cam installed. It has gotten a little worse when I installed 60 lb/hr injectors. I have a wide band O2 and my car runs on the rich side (about 14.2 AFR).
My 1998 does the same thing randomly. Wires, plugs, pcv and filters all done and it still has a slight lope at an idle at times. Quarter mile times are fine as well as fuel economy and zero oil consumption between changes. When I change the cam it will have a reason to lope!
Seafoam may be the cure. It worked very well for me. Idle is bang on now.