need help also
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Cross-Country
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need help also
I have a problem with a '96 350. It has been occasionally stuter-stepping and twice the overdrive light blinked on. When we pulled the codes, it came with PO470, PO500, and PO1298. Replaced the cheapest first, the speed sensor. Drove it again and the same thing happened, except this time it was just PO500 and P1298. It only does it occasionally and the truck has been sitting more the last couple of months (less pulling to do and high fuel prices) I think it is too fishy for the IDM and PCM to go out at the same time. Is there something simple which might cause those codes. Thanks ahead of time.
kb
kb
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Joined: Oct 2005
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Ford built the E40d with a plastic bleed valve that can be upgraded to an aluminum unit that will sometimes cure this problem. There is also a "code62" repair kit (relates to convertor slippage) that makes change to the pump pressures and also contains the valve. The syptoms of this are hard shifts and a flashing overdrive cancellation light. With the intermittent behavior, you might just have some debris in the electronic shift solenoids and need to have the tranny serviced....
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Cross-Country
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The transmission has the upgrade and was sewrviced around 10,000 miles ago. If the oil needed changing or the fuel filter cause the codes? Both only have 5000 on them but it has had a trailer hooked to it most of those miles. Any help would be greatly appreciated.
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Joined: May 2001
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From: Cabot, Arkansas
It's odd that the speed sensor code (P0500) would come back immediately after changing the sensor. Did you clear the codes after you replaced it?
Where did the reference for the PCM going out come from? The codes you listed are the exhaust backpressure sensor (P0470), The VSS (P0500), and the IDM (P1298)
Your description (to me) sounds like a bad VSS, but it's possible that the wiring harness from the IDM to the injectors has a short in it...since you are getting an IDM failure code with a truck that still runs.
Where did the reference for the PCM going out come from? The codes you listed are the exhaust backpressure sensor (P0470), The VSS (P0500), and the IDM (P1298)
Your description (to me) sounds like a bad VSS, but it's possible that the wiring harness from the IDM to the injectors has a short in it...since you are getting an IDM failure code with a truck that still runs.
Last edited by cookie88; Oct 7, 2005 at 10:06 PM.
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Cross-Country
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The codes were cleared after the speed sensor was replaced. The stealership was doing the work since none of my buddies could hook up to the diagnostics port with their stuff. They came to my work and picked up the truck and scanned it for free the second time and said they "thought" it was either the idm or pcm but were hesitant to say for sure (which I thought was nice) I have been driving the truck more and it seems to be getting better but even since it started it would only mess up for a couple seconds and it was always within 5-10 minutes of starting. that is why I was wondering if it could be oil or fuel related since it has set a lot the last couple months. Once it gets warmed up fully, it is fine. We have also been experiencing extremely dry, dusty conditions this fall (until this weekend) I am much more comfortable working on my JD farm equipment, old dozer and old excavator but I do know enough about this new electronic stuff that very small simple stuff can throw a kink in it. Thanks again.
kb
kb
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