jerryb Posted June 29, 2007 Share Posted June 29, 2007 Im using one of those Walbro 255L/H fuel pumps for my RB20. I set it to 43 PSI but over a an hour of operation my pressure drops to 20PSI??? At this point if I start to increase pressure the car starts to run rough. With a pressure decrease I see my A/F drop as well. Is this a bum fuel pump...or should I look for something else?? My battery voltage is stable.... Any ideas are appreciated thanx Quote Link to comment Share on other sites More sharing options...
Careless Posted June 29, 2007 Share Posted June 29, 2007 Im using one of those Walbro 255L/H fuel pumps for my RB20. I set it to 43 PSI but over a an hour of operation my pressure drops to 20PSI??? At this point if I start to increase pressure the car starts to run rough. With a pressure decrease I see my A/F drop as well. Is this a bum fuel pump...or should I look for something else?? My battery voltage is stable.... Any ideas are appreciated thanx bummed FPR or faulty pump, i'd say :/ have you checked your fuel filter? Quote Link to comment Share on other sites More sharing options...
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