1992 Oldsmobile Toronado 1992 Toronado dies after 20 minute

1992 OLDSMOBILE TORONADO
170,000 MILES • 6 CYL • FWD • AUTOMATIC
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TIM MONGE
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My 1992 Toronado Trofeo dies after it has been running for about 20 to 30 minutes. If I let it sit for 30 minutes it will start but die again shortly there after. I get a code 17 (Spark Refernce Signal). I have replaced the Ignition module, the PCM, the Fuel pump and fuel regulator. I have also replaced the Cam sensor. I have checked wiring harnesses for ware but have not inspected them closely. I did connect a dual trace scope to the ignition module inputs and outputs and I can see that I loose the fuel enable signal when the car dies. I do get pulses from the Cam and Crank sensors when cranking the engine during a no start condition.

Can you provide an answer to this problem before I replace anything else.
Aug 26, 2010 at 11:38 AM
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HMAC300
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after looking at the wiring schematic, it seems like you might have a ground problem. the ground is by the left axle on the engine there are quite a few wires going to it and it's probably a stud easily found. It's probably losing ground due to getting heated up as you run for a longer period of time. Other than that it's got to be a connection problem.
Nov 1, 2010 at 9:19 PM