Help Please - 2000 Excursion V10 engine light
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Joined: Oct 2015
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Help Please - 2000 Excursion V10 engine light
Hi everyone, Id like to start off by saying im glad to be part of this forum. I bought my first Ex 3 months ago and love it. Unfortunately its time for inspection and I am having engine light issues. It was throwing misfire codes so I changed plugs and coil packs. Still having issues with random cylinder codes. Figured maybe the coils were a bad brand. I tried more coils and plugs and still having problems. The truck is not misfiring at all. My friend is saying it could be the ecm being the problem.
Before i dropped 400 on a new one i figured i would ask the experts on here. Has anyone came across this? Thanks
Before i dropped 400 on a new one i figured i would ask the experts on here. Has anyone came across this? Thanks
Elder User
Joined: May 2015
Posts: 752
Likes: 9
From: NYC
Hi everyone, Id like to start off by saying im glad to be part of this forum. I bought my first Ex 3 months ago and love it. Unfortunately its time for inspection and I am having engine light issues. It was throwing misfire codes so I changed plugs and coil packs. Still having issues with random cylinder codes. Figured maybe the coils were a bad brand. I tried more coils and plugs and still having problems. The truck is not misfiring at all. My friend is saying it could be the ecm being the problem.
Before i dropped 400 on a new one i figured i would ask the experts on here. Has anyone came across this? Thanks
Before i dropped 400 on a new one i figured i would ask the experts on here. Has anyone came across this? Thanks
Hotshot
Joined: Jan 2004
Posts: 19,762
Likes: 1,079
From: St Louis
Instead of wasting still more money throwing more parts at it, invest that money into having someone who knows what they are doing diagnose the issue for you. You need to know what cylinder(s) to focus on, otherwise you will waste considerably more money and time "shotgunning" the system blindly and hoping to get lucky. If you have the inclination, it's not hard to learn how to pull the needed diagnostic data from the PCM. There are literally hundreds of misfire-related threads in the forum that relate how.
Do NOT just replace the PCM without knowing what the proper procedure is. If you do, you'll have an even BIGGER problem.
Do NOT just replace the PCM without knowing what the proper procedure is. If you do, you'll have an even BIGGER problem.
Elder User
Joined: Sep 2009
Posts: 514
Likes: 2
I had a similar issue with cylinder 9. After I changed the cracked spark plug and installed a new motorcraft coil pack, I was still getting a misfire on that cylinder. Turned out to be a broken wire just after the connector that plugs into the coil pack. It wasn't noticeable to the eye, only showed up when tested. Cut the wire back and installed a new connector and all was good.
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