1992 Oldsmobile Toronado 1992 Toronado dies after 20 minute

TIM MONGE

MEMBER
1992 OLDSMOBILE TORONADO
6 CYL
FWD
AUTOMATIC
170,000 MILES

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.

1 Reply

HMAC300

MECHANIC
48,601 POSTS

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.