Quote:
Originally posted by DanzBorin
the 5000 rpm problem is as stated before... the ECU reads that the car is running extremely lean, so it takes drastic measures and keeps it below... the only sure fire fix is to use an AFC... the cobb intake does not have that problem...
this problem is only related to the my99 MAF...
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Winner! Read the March 2000 Issue I think of Sport Compact Car magazine - they had to add like 26% fuel above 5,500 rpm to correct a lean condition, in cone filter J tube intakes.
I used to think it was likely from the intake valve pulses being reverberating back down the intake, but if the PRM filter you used fixed it, then that blows that theory.