Luvmyxcurs
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• Oceanside, CA, USA |
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• Registered on 4/5/2006 |
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• 18 posts |
• 1
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 Posted:10/31/2009 13:50 |
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Ford is killing me again. My baby stalled on the highway, could not restart...just turned and turned. Had it towed to Dealerdhip, and $500 later they said it was a wire to the computer. Took it home and stalled again, but this time it restarted. Took it back to Fords and they again started troubleshooting. Now they say its the ICP sensor $450. I told them no thanks, and went home, purchased an ICP from the delater for $175, installed, and today AGAIN it stalled twice while driving. Restarted both times, but am fearful of driving now. No error or check engine light. Can it be another defective CPS? Help! |
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dnevins
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• Subscriber since 12/29/2009 |
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• San Diego, CA, USA |
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• Registered on 12/28/2009 |
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• 340 posts |
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The ICP sensor you replaced and the cam position sensor (CPS) are two different parts on the 7.3, and the CPS is the one I'd go after next. It's a common failure on the 7.3 Power Stroke, and a failing one may or may not set a code, so no check engine light doesn't rule it out. A sudden stall where the engine cranks and won't catch, then restarts fine later, fits it well.
Quick test the next time it quits: watch the tach while you crank. If the needle doesn't move at all while cranking, the PCM isn't getting a cam signal, and the CPS or its wiring is the prime suspect. (One owners' forum reports Ford moved the tach feed on some later 7.3 trucks, so a moving needle doesn't fully clear the sensor.)
The sensor is at the front of the engine just above the harmonic balancer, at about the 11 o'clock position, held in by one bolt. Use a Motorcraft or International sensor. Cheap aftermarket ones have a poor track record, and plenty of 7.3 owners keep a spare in the glove box.
The dealer's first find was "a wire to the computer," so while you're in there, check the CPS connector and the harness running to it for chafing, oil soaking or a loose fit. An intermittent connection there acts just like a bad sensor.
If a good CPS doesn't cure it, have the fuel pressure checked while the truck is driving before you buy any more parts.
Dana
https://partslogic.com |
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