1989 Ford Probe Electrical system Problems

“The engine stops unexpectedly while driving, cutting out the power brakes and power steering and making my front-heavy front wheel drive car very very hard to steer and very very difficult to stop. The engine stops unexpectedly often, without warning. I thought this was tied to the ignition switch, but changing the switch and wiring did not help. At the same time of this problem, the ignition switch stopped turning on the starter, but will let the engine run.”

“After pulling all fuses in the driveway with vehicle off, to check them and putting them all back, verifying several times the correct location, the car cranks but no longer starts. There is no spark, no fuel pressure. Ignition coil gets 12v power to both prongs until cranking, then losses all power. 4eat computer under the dash reports fault with the throttle position sensor. Throttle position sensor is in good condition and this was verified by testing it manually using a voltmeter, a bad tps will not cause a no start situation anyway. Replaced the 4eat control module and no change. …”