1979-1993 & 94 Conv [Subscribe to Daily Digest] |
![]() | [Main C900 Bulletin Board | BBFAQ |
Prev by Date | Next by Date | Post Followup ]
Member Login / Signup - Members see fewer ads. - Latest Member Gallery Photos
Maybe a bad fuel pressure regulator Posted by RS [Email] ![]() ![]() ![]() In Reply to: Fueling problems, SimonR, Wed, 12 Mar 2003 23:11:53 Members do not see ads below this line. - Help Keep This Site Online - Signup |
But then, again, it could be a bad fuel pump relay or ECU. Or a combination of the above.
The fuel pump won't run until the ECU receives a signal from the ignition module indicating that it's firing the spark plugs. Turning the key to the run position without turning it over won't start the pump.
You may have one of those rare LH 2.2 ECUs that has bought the farm.
The good thing about that is that good used LH 2.2 ECUs are relatively easy to come by. Pick one up from any 900T from '85 to '88. You could also use an ECU from an '86 or '87 N/A 900, but you'd want to swap in the EPROM from your ECU. But when you replace the ECU, replace the fuel pump relay and the system relay as these are a cause of ECU failures.
Just as a quick check, pull the vacuum hose from the fuel pressure regulator and see if there's gas in it. If there is, a new FPR is in your future. Having all of the injectors stick open at the same time is on the order of the liklihood of hitting the powerball jackpot.
posted by 66.21.16...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
![]() |
![]() |
![]() |
![]() |
![]() |