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01 Excursion with romps, poor idle, then dies

1K views 7 replies 4 participants last post by  CSIPSD 
#1 ·
I am helping a friend with his 01 Excursion. Truck was running great, then suddenly upon start up it has a serious case of the romps, then idles properly for about 30-45 seconds then it starts to run rough again until it dies. After the truck dies it will not restart for ~5 minutes.

So far we have ran AE and it came up with no codes.
Swapped the IPR, ICP sensor, Cam sensor, IDM, and fuel pump with no improvement.

Any ideas?

Thank you
 
#4 ·
Oil level is and was ok, and changed about 500 miles ago.
 
#5 ·
I actually forgot my fuel pressure gauge at home when I made the trip (~100 miles) to help Chad out. So I wasn't able to test it. I believe he is replacing under valve cover harness. I might head back over this weekend to continue giving him a hand..
 
#6 ·
Crap... You have been trying to call me too...

How many miles on the X? Any mods to it?
 
#8 ·
Pull the plug on the HPO res when it dies and see what the level is at.

Check the fuel pressure as well, but I doubt thats it. Sounds like an oil or ICP issue.
 
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