Re: Engine RPM flucuating at Idle
Fluctuating rpm at idle is often caused by a dirty idle air passage and Idle Air Control motor plunjer in the throttle body. Clean this very well and try again.
Is it still fluctuating, then it is probably the TPS sensor.
Also when you donīt know the history of the jeep, its good to change all oils/fluids/filters etc.
JEEP Grand Cherokee 4.7 Lmtd 2004
HID 8000K in low and fog / Quad Squad member
Monroe Reflex shocks /
Pirelli Scorpion ATR 245/65/17/
Transgo reprogramming shiftkit.