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Old 05-25-2013, 02:43 PM   #123
Scooby Newbie
Member#: 319484
Join Date: May 2012
1998 OBS-T


hey guys, so i got my walbro and 8 to 1 fmu installed, and i verified that it is working. my starting fuel pressure is 32 psi, and under 4psi of boost, it goes up to 60 psi, which is what is supposed to happen. the problem is that im still having the same fuel cut issue, where at 4000rpm, it just cuts out, and the boost drops. i have a check valve before the map sensor, and i tested that to make sure it wasnt seeing any boost....i just dont get what could be causing it to cut out. if it is the knock sensor causing it, would one step colder plugs fix this issue? i am still using stock plugs. thanks so much everyone for your help.
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