detonation on boost?
#1
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detonation on boost?
I made a post on this a while ago and i went on vacation and i can't find the post anymore so please dont flame me.
Anyhow, everytime i hit boost i detonate, i know its not my pressure sensor, i changed it wiht one i know was good and did the same thing. I today changed my TPS sensor, yeah it runs better but it still detonates. I check for vacuum leaks and couldn't find any. I really dont know what else to check i have an aftermarket turbo and an afc and i was boosting 15 psi and if its anyhelp when it starts detonating my air fuel drops like a rock to lean. Also if i go slow enough i might be able to get 1-3 psi
Anyhow, everytime i hit boost i detonate, i know its not my pressure sensor, i changed it wiht one i know was good and did the same thing. I today changed my TPS sensor, yeah it runs better but it still detonates. I check for vacuum leaks and couldn't find any. I really dont know what else to check i have an aftermarket turbo and an afc and i was boosting 15 psi and if its anyhelp when it starts detonating my air fuel drops like a rock to lean. Also if i go slow enough i might be able to get 1-3 psi
Last edited by GeTCrAzYKiD; 12-18-04 at 01:26 PM.
#3
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I found it, I fried a resistor in my ecu because some wires are touching im resoldering in tomorrow if i get time. Hey ran like a dream before this.
#5
I'm a boost creep...
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scathcart has nailed it, this is a textbook example of bad modification of a turbo'd engine. Big turbo upgrades come after you upgrade fuel and intercooling, not before. I can't believe you're actually asking why you're detonating. It's certainly not because of a fried resistor...
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