Detonation Problem -Help
11-18-2006, 06:05 PM
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Detonation Problem -Help I have a 2002 TA.
I just had it dynoed today.
The HP is what I expected, however the detonation was really bad.
The techs were too afraid to even pull it a second time.
I use 91 octane from Shell or Chevron.
The gas I used was from Chevron when I had it dynoed.
Ive had it tuned for this problem once before and he took care of the detonation.
Im just a little upset right now as to why this would happen a second time.
All of your thoughts and answers?
I just had it dynoed today.
The HP is what I expected, however the detonation was really bad.
The techs were too afraid to even pull it a second time.
I use 91 octane from Shell or Chevron.
The gas I used was from Chevron when I had it dynoed.
Ive had it tuned for this problem once before and he took care of the detonation.
Im just a little upset right now as to why this would happen a second time.
All of your thoughts and answers?
11-19-2006, 04:59 PM
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You might have excessive carbon build-up in your combustion chambers causing a pre-detonation. Any recent problems you hve been dealing with? If your cranksensor gets out-o-whack you can have all sorts of timing problems. You could add a cherry bomb octane boost before the dyno run for a temp fix.
11-20-2006, 05:47 PM
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Well, I looked on the dyno sheet that I got.
It looks as if its detonating at high speeds.
Our car club tuner mentioned to me that he is going to tune the detonation out.
The last time I had this detonation tuned out was at a low speed.
I feel much better now, but was dissapointed that I couldnt run the car at the track yesterday.
It looks as if its detonating at high speeds.
Our car club tuner mentioned to me that he is going to tune the detonation out.
The last time I had this detonation tuned out was at a low speed.
I feel much better now, but was dissapointed that I couldnt run the car at the track yesterday.
11-20-2006, 06:57 PM
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Did the tune happen to be for a 160 thermostat when theres still a 195 in it? Im not sure if that would have something to do with it for sure but I know when tuning mine I was told to put a 160 in it so they can program for that.