#76245, "Shakey FP gauge needle, SFMU not working"
I have the SFMU (Dark Spring, 2.72 disk) T'd off is a B&M fuel pressure gauge. Anyways at idle the needle shakes at around 20-22psi, after I let off the gas it goes to 18psi. I thought it was the gauge but when I turn it to ACC the gauge does not shake but just goes into the normal cycle of going to about 30psi then slowly drops off. Another thing I notice is that my FP gauge used to drop to 0 after I turned off my car and now it goes to 5psi then slowly to 0. Also when I boost my car used to run good, with the restrictor inline, running about 55-58psi @ 7lbs now it runs like 60+psi @ 4psi and even not in boost fuel pressures are way high. I checked the rubber return line for bends or kinks, but nothing, I gonna get it replaced with a hardline soon. I also checked the feed line and vaccumm lines..vaccumm is around 15Hg at idle (my GReddy BOV diaphram is torn a little) Can anyone help out? Thanks Alvin
#76270, "RE: Shakey FP gauge needle, SFMU not working" In response to Reply # 1
Originally posted by admin2 Sounds like a kinked return line to me... BTW - your Greddy BOV having a worn/torn/split diaphram won't cause low idle vacuum
#76285, "Another question..." In response to Reply # 3
I'm gonna run alluminum tubing to the hardline of the top of the tank...now how would I attach that? A simple hose that's bigger than the two?...but I can't really torque it down on the alluminum pipe cuz isn't that too soft that it might crush it? THanks Alvin
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