04CHASE Posted April 15, 2005 Report Share Posted April 15, 2005 well i have been noticing a noise when wot above 3000 rpm and it sounds like a raspy sound coming from the engine i asked a buddy he said it was detonating have a similar issue 9mods are (pcm,cai,zippy shift, 05 fans) Quote Link to comment Share on other sites More sharing options...
BenKey Posted April 15, 2005 Report Share Posted April 15, 2005 It can be heard, yes. I won't say that that is what you are hearing. Do you have any logging software, or know anyone who does? It's the best way to see for sure. Just started? Running 92/93 octane? Quote Link to comment Share on other sites More sharing options...
04CHASE Posted April 15, 2005 Author Report Share Posted April 15, 2005 started after i added the tune all i can get is 91 Quote Link to comment Share on other sites More sharing options...
2drTahoe Posted April 16, 2005 Report Share Posted April 16, 2005 I hate the sound of detonation It's a pinging. some say steel marbles bouncing. I wouldn't say it ever sounded like raspy noise. I usually hear it under heavy acceleration, kind of like the engine catching up to the power I just requested. I can make it come and go by fluctuating the pedal when I have my foot in it. Quote Link to comment Share on other sites More sharing options...
fordsareslow Posted April 16, 2005 Report Share Posted April 16, 2005 I had this in my truck a while back. Truck was totally stock. Mine would happen at 3/4 throttle. Had a problem with the injectors. Dealer fixed it under warrenty. Quote Link to comment Share on other sites More sharing options...
ces63ss Posted May 11, 2005 Report Share Posted May 11, 2005 i had detenation after installing by diablo programer. using 9 oct. found out it was bat fuel. went to 76 gas station after burning the bad fuel off. what i did between tanks was added a can of octane boost. problem went away. what i heard when i had my detenation was what i thought was popcorn pooping. really ugly. and it happened arroubd 4k rpm. hope this helps. cesar Quote Link to comment Share on other sites More sharing options...
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