Fried ECM?

COREYZIMMERMAN

MEMBER
2003 FORD EXPEDITION
5.4L
V8
4WD
AUTOMATIC
100,000 MILES

I had a no crank no start, I checked all the relays fuses and replaced the starter, still nothing just random starts. So, I had it taken to the Ford dealership in town and the first thing they told me was they were replacing the ECM or PCM, then called and said they had to make two new keys. Then it was the transceiver, then they called back saying whoever worked on the truck last hooked the ECM or PCM up backwards and now it’s fried. Ts there any way this guy could have fried my computer and is now trying to cover himself?

4 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

Did he explain how the PCM was hooked up backward? The connectors are different sizes and really can't be mixed up.

Let me know.

Joe

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Friday, December 16th, 2022 AT 10:17 PM

COREYZIMMERMAN

MEMBER
3 POSTS

No, all he said was it was hooked up backwards and that over time, it burned it out. My truck ran like it was brand new and never had any problems until the no crank no start that would still randomly start.

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Monday, December 19th, 2022 AT 11:47 AM

COREYZIMMERMAN

MEMBER
3 POSTS

Now he’s saying the truck still might not run after a new set of keys a new transceiver for the keys and a new ECU.

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Monday, December 19th, 2022 AT 11:49 AM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

That certainly isn't encouraging. Here is how I look at that response. Either he doesn't feel confident in his diagnosis, or he feels the issue is something different. The repair he is recommending isn't a cheap one.

Is there anyone other where you live that can check it?

Joe

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Monday, December 19th, 2022 AT 4:15 PM