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2000 excursion shutting down....Help!
First off, this is my first post. I have been reading the forums here for a while and all I can say is what a great place to get information on the powerstrokes.
Here's my problem and I think it's unique since I have a friend who is a Ford Tech kinda stumped so far.
Every morning when I leave for work my truck will shut off usually around 10 minutes after leaving or just about when the truck gets up to operating temp. Brought it into the shop and my buddy ran the codes and said it looked like the CPS. Replaced it and it ran fine the next day. The day after same problem, died after about ten minutes. I bought another CPS and installed it with no results, same problem. Here's the weird part. Only shuts off that one time and runs fine the rest of the day. Been doing this for about 2 weeks. Shuts off that one time in the morning, truck sits all day while I'm working, hop back in it drive it home with no problems. I drive 40 miles one way.
This morning I started the truck in the driveway and let it idle, it died after about ten minutes. One thing I have noticed.....after it dies and I turn the key off and back on if the wait to start light comes on and stays on like a normal cycle the truck will start, and sometimes the wait to start light will flash on real quick and shut off, when this happens the truck won't start. I have checked all the wiring in the engine bay including the harnesses on the valve covers and they all looked good. I have noticed this morning my high idle wasn't kicking in like it normally does. I just can't figure out why it only shuts down once a day. One other thing, this morning when the truck died while idling the O/D light on the shifter lit up for a split second and that's when the truck died. I have had a few instances when the truck will die, I fire it back up and it will hiccup a few times and then run fine.
I have read somewhere that some guys have had to shim the CPS on higher mileage trucks. Mine has 160k on it. I would like to try this but don't know what I should use to shim it.
Oil is at proper level. This problem did start after the last oil change, within a day or two.
Just wanted to know if anyone has experienced something similiar so maybe I can narrow it down before the shop starts sticking a bunch of new sensors in it.
Thanks in advance to anyone who might be able to help me out.
Last edited by voodookid23; 11-10-2007 at 11:45 PM.
Reason: add to post: No check engine light since the problem started. All fuses were checked and were good.