DETONATION!! & PREDATOR??
08-04-2003, 05:12 PM
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Re: DETONATION!! & PREDATOR?? Scroll all the way down to the last output and it should show the amount of KR (Knock Reduction?) the PCM pulled out (in degrees) due to Detonation. KR can be caused by many things, the top 2 being excessive timing and/or lean mixture. The only way to really tune your car right is on a Dyno w/ Wideband O2 feedback.
Nick
Nick
08-04-2003, 08:14 PM
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Re: DETONATION!! & PREDATOR?? As Ncal said, go into Diagnostics & read the KR all the way at the bottom of Real Time Data. If you have it, try reducing Spark (timing, 5% = 1 degree) & increasing the PE (air/fuel richness, 2.5% = I dunno what). You can check your O2s for a rough estimate of your a/f. Around 900 seems to be right for most cars. Because of my GMAF (?), mine is best around 925 (a/f = 12.6) which I get with + 3.5% PE.
08-05-2003, 02:00 PM
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Re: DETONATION!! & PREDATOR?? Alright, I drove around watching the Predator, 90% of the time the KR read "0.00" but once in awhile it read up to "2. something" only for a sec. though is this false knock???
08-06-2003, 12:23 AM
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Re: DETONATION!! & PREDATOR?? PE= 0% and TIMING=9%
The reason why I think it could be false is because I have a fairly stock car TSP Lid, cutout, Magnaflow Catback, and Predator.
The reason why I think it could be false is because I have a fairly stock car TSP Lid, cutout, Magnaflow Catback, and Predator.
08-06-2003, 01:30 AM
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Re: DETONATION!! & PREDATOR?? A Lid & Cat-back may cause the car to run leaner and in the Texas heat with 9% more Timing, I'd be careful about dismissing it. What MSCLCAR posted above looks like a good plan of action.
Nick
Nick