Question about 1996 Saab 900
Check the fuel line safety cut off switch - usualy a red coloured button under the dashboard on the passanger side - check the user manual if you cant find it - when you do then just push it in to reset it.
Posted on Mar 18, 2011
Check the crankshaft position sensor, which is on the block behind the exhaust manifold toward the transmission. If this sensor is faulty the ECU does not detect a pulse indicating the crankshaft is rotating, so will not activate the fuel pump. It is a safety feature in event of a crash, so fuel will stop at the pump if the engine stops due to front impact/ crash. If the car starts OK cold , but cuts out when hot, or will not start after running when hot, the crank position sensor will likely be the culprit. No pulse from CPS, no fuel pump. Easy.
Posted on Apr 27, 2014
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Posted on Jan 02, 2017
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Aug 21, 2012 | Cars & Trucks
Aug 04, 2011 | 1993 Buick Century
Apr 11, 2011 | 2000 GMC Sierra
· Fuel Pump secondary circuit shorted to power
· Fuel pump relay contacts always closed
· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit
· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power
· faulty ECU
Engine Does Not Start:
· Open inertia switch or inertia switch circuit
· Open in or between ECU and fuel pump (This includes open in fuel pump brushes/windings)
· faulty ground connection at fuel pump
The easiest way to check this circuit is to go to the fuel pump relay. If the relay clicks when the key is turned to the "RUN" position, then the inertia switch circuit is ok.
The Pink/Black wire starts from the fuel pump relay and goes two directions. One side goes back to the fuel pump. The other side is the fuel pump monitor circuit and goes to pin #8 at the ECU. This wire should only be hot for a second or two when the ignition is turned to the RUN position.
The fuel pump relay receives power on the Black/yellow wire. It comes from a fusible link at the power distribution center. This wire should be hot at all times.
If all the above is working as designed, them you probably have a bad fuel pump.
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