Re: Fuel pump electrical issue - Saab NG900 & OG9-3 Bulletin Board - Saabnet.com
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Re: Fuel pump electrical issue
Posted by Dean [Email] (more from Dean) on Sun, 26 Feb 2006 10:24:13
In Reply to: Fuel pump electrical issue, Doug
[Profile/Gallery]
, Sun, 26 Feb 2006 07:42:21
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The pump comes on as you expected for a second or two then stops. The fuel pump relay then is closed, and the fuse energized, when the ECU gets a signal from the crankshaft position sensor indicating that the engine is turning.
FPRs going bad often occur after a fuel filter replacement when the FPR is thought to be contaminated, perhaps by bits from the old rubber coated sealing washers.
Cleaned the injectors? Plugs ok?
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