Quote:
Originally Posted by puravidabahia
hello, yes and i have previously had the vacuum tested with a smoke test; some repairs were necessary and after those the smoke test did not produce any leaks
the mechanic i have has over 20 years with porsche and even he is stumped
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one would have to look at some data like O2 sensor waveform and fuel trim waveform under various conditions. perhaps something like O2 sensor signal bias is an issue.
Meaning if your O2sensor signals are biased lean then the system will try to adjust by adding fuel. But it is unlikely that both sensors have the same issue and only in a certain RPM range.
The hard starting situation at fill up followed by poor running-- does that only happen at fill up?
How does the car run off idle? Mid range RPM and upper range RPM?
Is the car stock? Stock exhaust? Stock air filter?
Oops sorry just reread your original post and see that O2 sensor was replaced.
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