When in doubt, "chip your car?"
06-17-2003, 07:46 AM
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When in doubt, "chip your car?"
Well as a few of you know Ive been working on how to fix my "positive boost deviation" problem on my 00 1.8t for a few weeks now. Needless to say it was making me furious because it kept throwing me into limp mode. I finaly picked up my skirt and took it to autosport werks in broomfeild, CO. well after about an hour of testing (I went in assuming it was a vac line I could not find) It seemed my car was in good health. It turns out (tell me if this makes sence) that because I have an aftermarket exhaust with no resonater, and other than that i was stock, my turbo would over spool due to free flowing air and trip the ECU into thinking somthing was wrong and throw the car into limp mode. And oddly enough a quick fix to this was to chip the car. Well, I couldnt have heard a better remedy to the problem so I did, and I havent been back in limp mode since. But a few questions.
1) When I first go into wot ill spike at about 20psi, then steadily drop to about 10 psi. Is this normal for apr w/ exhaust?
2)does everything the techs told me sound in order?
3)also i seem to be experiencing some lag when im on the highway in 5th gear between 3-4k it will seem that my car gets less powerfull as i press the throttle for a few seconds. anyone else get this? any help would be great, thanks guys.
1) When I first go into wot ill spike at about 20psi, then steadily drop to about 10 psi. Is this normal for apr w/ exhaust?
2)does everything the techs told me sound in order?
3)also i seem to be experiencing some lag when im on the highway in 5th gear between 3-4k it will seem that my car gets less powerfull as i press the throttle for a few seconds. anyone else get this? any help would be great, thanks guys.
06-17-2003, 08:15 AM
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I have a 99.5 with custom exhaust and mechanical boost controller.
I have the boost controller set at about 12psi. I have a VAG and often check codes even though I do not have a CEL on. I always have the positive boost deviation code but never go into limp mode....
1)your boost drops at higher RPM's to keep the compressor working at a high efficiency. Plain and simple the K03 just can't flow enough air at high RPM's so the boost has to drop(part of your programming in the chip).
2)your exhaust is definately flows exhaust better but it is completly independent of the wastegate and the mass air flow. Just a thought not an anwser....
3)not sure why this happens...might have to do with the DBW system
1)your boost drops at higher RPM's to keep the compressor working at a high efficiency. Plain and simple the K03 just can't flow enough air at high RPM's so the boost has to drop(part of your programming in the chip).
2)your exhaust is definately flows exhaust better but it is completly independent of the wastegate and the mass air flow. Just a thought not an anwser....
3)not sure why this happens...might have to do with the DBW system
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