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What am I feeling? Bad n75/Maf/Giac-x related/fuel pump?
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AudiWorld Senior Member
Joined: Nov 2003
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What am I feeling? Bad n75/Maf/Giac-x related/fuel pump?
Here is what's going on. At any speed, throttle posistion or rpm the car will _____. I don't know how to fill in the blank. The car will just cut off for a milisecond. For example, on the highway, it will just buck a bit and that's all I feel. At times I can catch the boost gauge when this happens and boost is definetly lost. This could happen twice an hour or once a week. I don't have any codes, I updated the giac file summer of 2004, I changed my fuel pump and filter last summer, I have a new ECT, and no boost leaks.
I've lived with this problem the entire time I've had the car chipped. I am currently at stage 2. I've never been able to log when this occurs. It feels like a hiccup when crusing, but under a hard load it really kicks your back for that milisecond.
I've searched, but I can't find anything about this kind of problem. Any advice, suggestions or input would be greatly appreciated.
I've lived with this problem the entire time I've had the car chipped. I am currently at stage 2. I've never been able to log when this occurs. It feels like a hiccup when crusing, but under a hard load it really kicks your back for that milisecond.
I've searched, but I can't find anything about this kind of problem. Any advice, suggestions or input would be greatly appreciated.
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Joe Kucinski
Senior Member
Joined: Sep 2000
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Can you borrow an ECU from someone else ? Maybe even a stock ECU. I assume you
pressure tested to come up with the statement "No Boost Leaks" ?
I would try to log 015, 016 to check for misfires. I would also try and log 003 to see what your throttle angle is doing when this happens. Maybe a throttle body issue.
FPR ?, not sure how often these fail, seems unlikely.
Make sure you have pressure tested well. Just a few ideas.
I would try to log 015, 016 to check for misfires. I would also try and log 003 to see what your throttle angle is doing when this happens. Maybe a throttle body issue.
FPR ?, not sure how often these fail, seems unlikely.
Make sure you have pressure tested well. Just a few ideas.