No start 2000 excursion 7.3

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Sep 6, 2025 | 12:12 PM

Tylerconn

Thread Starter

1st Gear

Joined: Sep 2025

Posts: 1

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No start 2000 excursion 7.3

Hello all so I have a 2000 excursion limited with the good Ole 7.3 250k miles yesterday truck just died on ne and will not start has codes p0380 p1262 p1278 replaced uvch and swapped in a known good idm fired right up passed buzz test etc drove down road and died again same thing now have codes p0380 p1262 p1278 p1298 p1293 p1294 p1296 not sure where else to start idms are not cheap lol uvch has been replaced with pigtails now crank no start

Sep 7, 2025 | 01:38 PM

Jimmy's Pilot Service

Laughing Gas

Joined: Nov 2020

Posts: 995

Likes: 367

From: Republic of Texas

And my questions would be this..

Where did you get your parts?
What were the names on the packaging?

Sep 12, 2025 | 08:22 PM

97-psd

Logistics Pro

Joined: Mar 2007

Posts: 4,597

Likes: 843

From: knoxville, tn

Do you have a spare CPS? I would swap it out. What brand of parts did you use?

Sep 25, 2025 | 12:15 PM

story352

5th Wheeling

Joined: Oct 2013

Posts: 27

Likes: 4

From: Grants, NM

Seeing that many codes I would check your engine harness very carefully, especially at the drivers side valve cover where it seems to chafe on the valve cover. It may be more beneficial in the long run just to order a new engine harness since it comes with new UVCH connections, I never splice in new connectors there. Pull your valve covers and make sure none of the wiring that is supposed to be zip tied out of the way is pinched under the valve cover or cracking. If I had to guess the problem is somewhere right there on top of the engine.