Still getting Detonation???
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TECH Apprentice
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From: San Diego, Ca
Still getting Detonation??? After the new fuel pump and finally scanned my car for timing. I just tested it out w/125 shot. Detonation when I first spraying. My timing is around 27*, then is starts to drop, maybe it will go as low as 21.5-23,but all in all it stays around 24-27*.
What does everyone think? Could I be running too much timing?
**If anyone has EFIlive, I could email them the file, and get some thoughts on maybe whats going on.**
Thanks for the feedback!
Jason
What does everyone think? Could I be running too much timing?
**If anyone has EFIlive, I could email them the file, and get some thoughts on maybe whats going on.**
Thanks for the feedback!
Jason
Last edited by Blown Interceptor; May 8, 2005 at 03:09 PM.
what octane fuel are you using...if your only using 93....i would upgrade to at least 100 and see if it gets better...if you are detonating it can only be a few things.....to much advace timing.....too low octane fuel.......and of course no fuel at all....is all your fuel pressure readings look good??.....also you maybe want to back down to a 75 shot and test it
Thread Starter
TECH Apprentice
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Joined: Apr 2004
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From: San Diego, Ca
Originally Posted by Formula_Power
what octane fuel are you using...if your only using 93....i would upgrade to at least 100 and see if it gets better...if you are detonating it can only be a few things.....to much advace timing.....too low octane fuel.......and of course no fuel at all....is all your fuel pressure readings look good??.....also you maybe want to back down to a 75 shot and test it
Thanks,
Try upping your fuel jet a size at a time, every combo is different. Also, engine temp plays a role, try setting fans down if you haven't allready. On wet hits you usually see a lean spike upon activation, the n2o gets to the cylinder first then the gas, does it go away right after intial hit?
Thread Starter
TECH Apprentice
iTrader: (5)
Joined: Apr 2004
Posts: 399
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From: San Diego, Ca
Originally Posted by Robert56
Try upping your fuel jet a size at a time, every combo is different. Also, engine temp plays a role, try setting fans down if you haven't allready. On wet hits you usually see a lean spike upon activation, the n2o gets to the cylinder first then the gas, does it go away right after intial hit?
I have a manual fan switch, so cooling the engine is ok. It will go away right after I first start spraying, usually within a couple hundred rpm's, like 500-700.
Thanks for the imput...
