Fuel pressure varying by rpm/MAP
04-04-2007, 01:39 PM
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Fuel pressure varying by rpm/MAP Apparently the search function is down. (hopefully temporarily)
I just made some runs with my fuel pressure guage taped to the windshield wiper.
I have a Racetronix plug n play Walbro in my 98.
I have 58 psi at idle and part throttle driving (30-55 MAP). At low rpm high MAP (low rpm high gear than TP wide open) I have 55 psi> At high rpm high MAP (extended wot say 95 mph in 3rd after a run from 50) I have 52 psi.
Is this normal and expected?
I ran the test because I was noticing that my tune was rich at around town driving (low/mid MAP) but very lean at wot after 4000 rpm and my PE didn't seem to correct the problem as it should.
Thanks for your insight.
Perry
I just made some runs with my fuel pressure guage taped to the windshield wiper.
I have a Racetronix plug n play Walbro in my 98.
I have 58 psi at idle and part throttle driving (30-55 MAP). At low rpm high MAP (low rpm high gear than TP wide open) I have 55 psi> At high rpm high MAP (extended wot say 95 mph in 3rd after a run from 50) I have 52 psi.
Is this normal and expected?
I ran the test because I was noticing that my tune was rich at around town driving (low/mid MAP) but very lean at wot after 4000 rpm and my PE didn't seem to correct the problem as it should.
Thanks for your insight.
Perry
