Just installed fuel pressure gauge, boost/vac gauge and have scanmaster. FPR is stock but reading 40-42 at idle. My Kirban book says stock FPR is 28 at idle? Boost and FP rise 1-1 under boost. When I pull the vac line from FPR the pressure goes up 4-5 lbs.
I know the fuel pump is going bad as it is really loud, and after driving, it has a bad surge sound that cooresponds to 4 inch fluctuation of vacuum and about 1 lb on fuel pressure gauge. Fuel pressure also sometimes drops to 36 at idle.
Trying to tune, too many other issues/ tests am performing, data from scanmaster-but first need an answer to this question.
Carl
I know the fuel pump is going bad as it is really loud, and after driving, it has a bad surge sound that cooresponds to 4 inch fluctuation of vacuum and about 1 lb on fuel pressure gauge. Fuel pressure also sometimes drops to 36 at idle.
Trying to tune, too many other issues/ tests am performing, data from scanmaster-but first need an answer to this question.
Carl