Now......fuel pump or FPR failure? - Saab 900 Bulletin Board - Saabnet.com
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If shutting off injectors and spark plugs one at a time doesn't find a problem related to one cylinder then the problem is affecting them all equally. That suggests: air intake problem, fuel delivery problem or some weird ignition problem. I'd suspect the fuel pump or the fuel pressure regulator.
Is there gasoline in the vacumm hose that's attached to the FP regulator? If so then it's fubar and may be the problem. To really test the pump you either need to do a flow (GPM) test, pressure test and or install a known good pump and see if it's fixed.
Posts in this Thread:
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- SPG started to misfire and died, josh, Tue, 24 Nov 2015 13:13:32
- Re: update, Josh, Thu, 3 Dec 2015 15:16:11
- Re: SPG started to misfire and died, josh, Wed, 25 Nov 2015 11:49:13
- Re: SPG started to misfire and died, Cmyles , Tue, 24 Nov 2015 15:09:32
- Re: SPG started to misfire and died, Simon S, Tue, 24 Nov 2015 14:44:41
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