The other day i went and got on my car pretty good and noticed it all the sudden started pinging really bad. Ive tried some octane boost thinking maybe bad gas. Then checked my timing which is only at 8* and still the car pings. Also checked my fuel pressure which is at 40# so didnt think it was that bad. I am looking for any more ideas..... Also i have a dyno tuned diablo chip so i was wondering if maybe that could be malfunctioning. I checked my timing with the bypass in and it ranged from 25* to 38* depending on the throttle. If you can give me any ideas would be greatly appriciated.

Thanks

 

what octane gas are you running? try premium if you don't.

did it just one day randomly start pinging? under acceleration or when?

 

run a koer test

 

Always running premium will try to koer test

Thanks

 

ok this is the first time ive ran a koer test so i think these are the correct numbers
41
21
72
136

any ideas where to go from here?

 

I am pretty sure your problem lies with those Chinese cylinder heads. JK! #41: Injectors out of balance on 5.0 SEFI; EGO sensor voltage low or EGO sensor out of range; fuel pressure out of range/#21: Cooling Temperature sensor out of specified range or ECT out of range/ #72: System power circuit fault or electrical interference or Manifold Absolute Pressure(MAP) sensor out of range/ #136: Heated exhaust gas O2 sensor fault during KOER indicated lean bank #2. Hope this helps!