ECM replacement instructions

FLORIDUHHH

MEMBER
1994 FORD BRONCO
5.8L
V8
4WD
AUTOMATIC
128,000 MILES

My sons vehicle was running fine until I stopped at a red light. While sitting there at idle it suddenly died. It has spark but no power to the fuel pump. I have already replaced the relays and fuel pump itself. Problem being I cannot find the ECM. It is not near the ICM and PCM in the engine compartment or at the passenger kick panel. Where else did they hide them? Or am I completely wrong with my diagnosis?

1 Reply

KASEKENNY

MECHANIC
18,907 POSTS

The ECM and PCM are the same thing so I attached the info for the PCM replacement.

As for the issue, it could be the PCM but there are a number of other things that this could be. So here is a guide that will get us started:

https://www.2carpros.com/articles/stall-at-idle

At this point, I suspect there is a fuel issue so we need to start there.

https://www.2carpros.com/articles/car-cranks-but-wont-start

Here is a guide on how to test the fuel pressure which is the first things we need to do. Let us know what you find with this and we can go from there.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Thanks.

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