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Re: 90 Fuel Pump Woes Posted by Bernie [Email] ![]() ![]() ![]() In Reply to: 90 Fuel Pump Woes, Ralph Towner, Sun, 26 Jan 2014 10:59:59 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Hello,
First you need to see if you spark or injector pulses. If you don't I would suspect a crank sensor issue. Your fuel pump will not be powered if the ecm does not see a crank signal.
One of the first things I would do is clean the 2 grounds on the head and try to start it. Many times this has been a problem.
I believe your car is non turbo from your description above. I believe near the throttle body probably wire tied to the dipstick tube is the connector for your crank sensor. If you have no spark at the coil wire entering the distributer cap keep it undone and unplug the connector for the crank sensor and using a jumper wire quickly jump the two of the wires together I don't have the wiring diagram here so not sure which two. There are 3 wires in the connector so even if it takes 2 or 3 tries you will get the right ones. Just connect the jumper to one then touch one of the other wires quickly a few times and see if you have spark. I've used this method without damage several times on the road. If that method makes spark you need the crank sensor.
If you have spark it is possible the ecm is not grounding the fuel pump relay.
Let us know what you find.Good Luck, Bernie at George Riggin Specialty Automotive
posted by 24.101.10...
_______________________________________ George Riggin Specialty Automotive Current Saabs 1993 900 Turbo Conv. 1993 900 Turbo Conv. Auto 2003 9-3 Conv 2004 9-5 Arc Sedan 2005 9-3 SS 4 door 2005 9-3 SS Conv 2007 9-5 Aero Sedan 1986 900 Turbo Conv A few parts cars also
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