Having problems with your 2002 Jeep Liberty ?

2002 Liberty 3.7 Recent new heads, coil packs, plugs. At dealer compression OK , leak down test OK. was running perfectly then random misfires, spark advance jumping from 0-17 at idle.. At speed all is well. Its driving me nuts! Please help..

Posted / edited by AnonymousUser on : 11-01-2021

Answers :

You must RUN the scanner/computer for better diagnostic. You can have fuel system malfunction, detonation, valve noise, valve adjustment is set too tight, , intake manifold system is leaking.Engine fuel pump is defective+pcm (ignition system).In short the electronic is complicated now in vehicles.
God bless you
Repair Help & Product Troubleshooting for 2002 Jeep Liberty

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