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-   -   Check Engine Light on, FUEL TRIM reading (http://986forum.com/forums/boxster-general-discussions/16944-check-engine-light-fuel-trim-reading.html)

yellowboxster 05-29-2008 09:17 PM

Check Engine Light on, FUEL TRIM reading
 
Hello,

My check engine light is on and I went to my Porsche Mechanic and he checked it and said it was the fuel trim. He says it can be anything from O2 sensor to vacuum leaks. What is fuel trim exactly? and what can it be? I have a 2002 Boxster 2.7 90km. Also sometimes right before redline it feels like the fuel cuts out like the engine shuts off for a split second. Does this have anything to do with the "fuel trim"?

Thanks in advance for your help.

Brucelee 05-30-2008 06:15 AM

Never heard of this one. Did you test or replace the gas cap. Interestingly, that can cause a CEL.

:)

Topless 05-30-2008 07:06 AM

What are the error codes. Just shooting in the dark at this point.

yellowboxster 05-30-2008 02:51 PM

I was told it was fuel trim reading thats all he said and made an appointment to get it checked out he said it would take a few hours. If no one heard about this then im thinking twice about this guy

Paul 05-31-2008 09:16 PM

Quote:

Originally Posted by yellowboxster
Hello,

sometimes right before redline it feels like the fuel cuts out like the engine shuts off for a split second. Does this have anything to do with the "fuel trim"?

Thanks in advance for your help.

Sounds like you are hitting the rev limiter. BTW this gets logged in the DME.

yellowboxster 06-01-2008 09:09 PM

Sorry, what is DME and what does it do?

Paul 06-02-2008 04:08 PM

It's the car's brain.....


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