what would make me detonate or ping?

wildazme

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ok, i have been having a problem for a lil while now and i have no idea why. when i gun the car at full throttle my car gets a pinging detonating sounds. i have just installed 4 new o2 sensors in the car to see if it would help but it hasnt. the fuel filter was changed not all that long ago. the current mods i have are in my signature. i get the pinging problem when i have an 87 octane tune on the car, the only time it stops is if i use 93 octane gas with the 87 octane tune. when i put the 91 octane tune on the car it pings even with 93 octane gas. i took the tune off completely and even stock the car pings unless i use 93 octane gas. any ideas?
 

Adam

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Did you have the KN FIPK on when you got your car tuned or did you add it afterwards? I would run 93 octane if it solves the problem. Mail order or dyno tune? I am gonna bet mail order. You may have a bit too much timing on the 87,91 tunes. Don't let it detonate anymore, thats bad....real bad.

Adam ;)
 

LI98GT

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Could also be carbon build up, but not sure of your mileage. Since you have a tune, I would start there - too much timing. In the mean time, definately go with higher octane gas and/or octane boost.
 

uncltrvlnmatt

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most likely timing is to far advanced. Either run 93 octane or detune the car. Don't let the engine ping.
 

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