Hello I have this jeep that is driving me crazy. It pings on light acceleration when engine is at operating temp. It has had a new carburator, egr (operational), distributor, ignition coil, and map sensor installed, all vac lines have been gone over several times and ignition timing has been set to under hood instructions to a "t". It runs and drives great, no misfires just pinging. Harmonic balancer doesnt seem to have slipped and champion spark plugs have been installed. It does have a knock sensor on the intake just forward of the carburator ( can verify operation by tapping on intake and watching timing marks move) Maybe its not sensitive enough but I cannot locate one, part stores show one for 88 and up.
Saturday, February 4th, 2012 AT 11:43 PM