I have a 82 Jeep J10 with a Ford 460 engine and a Custom EFIS Multiport (91 camaro ECM). I have a problem with pinging or detonation since I started her up this spring and I have no clue why. I am not a tuner but rather I record a datalog and then burn my chip with the file created by my tuner. I have checked the base timing (6* before TDC) added 110 octane fuel, and nothing improves the situation. I can get a ping by merely reving the the engine in the driveway! It has a steady ping under almose any pedal pressure under load. my tuner says it can't be be spark knock because he has zeroed out the table? Not sure what that means but I am not recording much in the way of knocking in the datalog . My ECM controls my timing as well and I was wondering if someone could explain how exactly that the timing adjustments are made. Is it strictly an eletronic function or does the ECM control the base or breaker plate in the dizzy? The reason I ask is because I am trying to figure out if something mechanical is sticking (breaker plate) or is it a tuning problem or another mechanical problem. It pings in open or closed loop but seems to get worse as it warms up. Any help regarding this matter would be appreciated.
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