2006 F250 shuts off
#1
2006 F250 shuts off
First issues why this all happened is injectors 2, 3, 5, and 8 had horrible stiction. Used SnapOn Counselor to read the cylinder contributions. Truck has 287k miles.
So yesterday we rebuilt my trucks injectors and replaced all the o-rings on the rail, the ball valves, and the injectors, put new dummy plugs and stand pipes, cleaned the IPR and the screen.
After cranking for a little while to get the air out it cranked on and ran incredible. Like new. Let it idle for a few minutes and the truck had 200% better power when I moved it to fill the coolant reserve with water. Went to go drive it and it felt kinda sluggish. Went 1 mile down the road and when i let my foot off the accelerator it shut off. Could not get it started again.
After doing some of my own testing I noticed it shuts off when it reaches around 185 degrees. Will not start again until it cools off well below that.
So yesterday we rebuilt my trucks injectors and replaced all the o-rings on the rail, the ball valves, and the injectors, put new dummy plugs and stand pipes, cleaned the IPR and the screen.
After cranking for a little while to get the air out it cranked on and ran incredible. Like new. Let it idle for a few minutes and the truck had 200% better power when I moved it to fill the coolant reserve with water. Went to go drive it and it felt kinda sluggish. Went 1 mile down the road and when i let my foot off the accelerator it shut off. Could not get it started again.
After doing some of my own testing I noticed it shuts off when it reaches around 185 degrees. Will not start again until it cools off well below that.
#3
Just did it. No leaks.
But i borrowed the snap on counselor again. Cranking the ICP_PRESS slowly builds to 400 psi and then dumps pressure. Slowly builds up to 400, then dumps. This is with the ICP connected.
Unplugged, it and cranked it, it jumped to 779 psi. But no start.
Injector buzz test revealed no codes.
But i borrowed the snap on counselor again. Cranking the ICP_PRESS slowly builds to 400 psi and then dumps pressure. Slowly builds up to 400, then dumps. This is with the ICP connected.
Unplugged, it and cranked it, it jumped to 779 psi. But no start.
Injector buzz test revealed no codes.
#5
Unplugging the ICP throws a default PSI, thou it's usually a little higher. Shop air at 100 to 125 psi is not showing your leak. Like Randy said have you done the STC fitting? If you have anyway to put 400 psi to it (this is dangerous) the only other way is to recheck everything. It's not impossible but rare that your HPOP is going out. 2005 - 2007 are really reliable.
#7
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#11
ICP pressure readings
Cold idle:
RPM - 670. PSI - 660
Hot idle:
RPM - 700. PSI - 603
Hot revving:
1) RPM - 1500. PSI - 870
2) RPM - 2000. PSI - 1170
3) RPM - 2250. PSI - 1381
4) RPM - 2500. PSI - 1640
5) RPM - 3000. PSI - 2008
Revving down:
6) RPM - 2500. PSI - 1342
7) RPM - 2000. PSI - 1033
Then when i let my foot off the pedal, it shut off.
Cold idle:
RPM - 670. PSI - 660
Hot idle:
RPM - 700. PSI - 603
Hot revving:
1) RPM - 1500. PSI - 870
2) RPM - 2000. PSI - 1170
3) RPM - 2250. PSI - 1381
4) RPM - 2500. PSI - 1640
5) RPM - 3000. PSI - 2008
Revving down:
6) RPM - 2500. PSI - 1342
7) RPM - 2000. PSI - 1033
Then when i let my foot off the pedal, it shut off.
#14
#15
That's great logic right there. I'm thinking along the same lines. Otherwise, I'd try running without the valve cover and see if I'd notice anything leaking significantly from under the rail.