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Re: Fuel pump check valve... Posted by JustinHiFi [Email] ![]() ![]() In Reply to: Re: Fuel pump check valve..., sob95, Mon, 13 Sep 2010 09:31:29 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Crankshaft position sensor or CPS. Best to isolate problem before throwing parts at the car hoping to fix the problem.
First, check your fuel pressure regulator FPR on the fuel rail, it should hold vacuum when applied to the small vacuum nipple. If it leaks down, replace it.
To test the return valve in the feed line, simply crack the fuel filter banjo bolt or (if a 9-3 or 9-5) check fuel pressure at the rail after the vehicle has sat for a while. If you have no pressure in line, and your FPR is good, probably the feed line check valve.
Have replaced these a couple times on NG900s, 9-3s and 9-5s.
JustinHiFi
posted by 70.119.227...
_______________________________________ JustinHiFi Strictly Saab Inc. Melbourne, FL Current: -1991 900 S-PG MT -2001 9-5 Wagon AT -2006 9-3 SS AT Past: -1964 96 2-Smoke MT -1967 96 v4 MT -1983 900 Turbo MT -1985 900 SPG MT -1988 9000 Turbo Black MT -1988 9000 Turbo White AT -1990 900 SPG Red MT -1990 900 SPG Black MT -1991 9000 Turbo MT -1991 900 SPG Red MT -1992 9000 Griffin AT -2000 9-5 Aero Sedan MT -2001 9-5 Aero Wagon MT -2008 9-3 2.0T Sedan AT
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