minor or major?

[7.34ever]

I have an 03 with lots of mods including aftermarket turbo, stacked chips, exhaust, etc... runnin 38 inch tires with 90k on it. I started it and let it warm up for bout ten minutes the other day then drove across town and back and shut er down. I went out and started it up yesterday and it sounds like it's missing on one cylinder. I checked and added one quart of oil and changed the fuel filter... same thing. Someone told me about a valve sticking problem and I hope I'm not in denial about it. Any ideas? Thanks

[NCHornet]

You need to run some diagnostic tests, do you know anyone with AE software, or some snapon scanners will run it as well. Diesels do sound different in cooler weather. I would also check the UVC harness on both sides, they are known to come loose, look for burnt or loose connections. I would also check the GP system. Does it make this sound when plugged in?

[7.34ever]

my scanner was showing 2 codes. one for an electrical connection and another for the wastegate. i've since taken it to the repair shop where our company business is done. thanks for the reply. i'll keep ya posted on developments.

[Zaairman]

Well, I'd start by kicking whoever did the work on your truck in the junk, cause you can't stack chips on a Powerstroke.

Check the electrical connections at the valve covers, and find somebody with a good scanner who can do a buzz test on your injectors.