The Mud Pit > Wrenching
Rough idle
CnoteTJ:
So, yesterday i noticed my jeep was idling rough on the way into work. Once I got to spend a little time on it I noticed that the vacuum line for my heater and cruise control(havent used either in a long time) had come undone. Now, when I push in the clutch and pop her outta gear she starts loping like a drag racer with a heavy cam >:( (between 500 rpm and 1000rpm) any ideas on what the problem might be? Let me know...
rocket:
sounds like a vacuum leak. check all lines, check manifold vacuum, check pcv valve.
HOT-ROD:
check your idle adjustment. sometimes it backs off and lowers your idle. i would lean towards a vacuum leak with the clutch master. seem likely when you drop off the pressure the engine drops rpm's.
CnoteTJ:
more info on this...this only occurs when I am driving somewhere, after sitting for two minutes it is fine
Seabee_BUC:
I would suggest it's the fuel filter. Under load and driving, it could get starved for fuel especially with all your performance mods. When it sits, the engine gets plenty, because the pump can keep up with it. With a clogged filter, flow is severly diminished. I'd look into an adjustable fuel pressure regulator too, just bumping up 2-3 lbs. is a fine improvement in fuel delivery. It might not be $$ friendly due to gas prices right now however.
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