99 7.3 stalling skipping/missing need help! - Ford Powerstroke Diesel Forum
 
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post #1 of 7 Old 11-12-2013, 05:05 PM Thread Starter
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99 7.3 stalling skipping/missing need help!

Ok guys I've seen a few other threads with people having similar symptoms just as my truck. Figured I'd start my own thread.
So I'm going to work one morning I get about 10 miles down the road and start going up a hill and my truck starts loosing power and starts skipping/missing. I limp it on to work and it would idle as if an injector was bad skipping very badly. I cut it off let it sit all day crank it back up and it ran perfect. Drove it all the way home hook my trailer up and take off out the driveway about 4 miles and start up a hill and it started again. This time it was much worse and skipped to a stop and eventually stalled out on me. I turned the truck over until lit crunk (5 seconds maybe) and it just sat and idled very rough and wouldn't hardly move (had no power). After a few hours it was fine again. Changed the oil fuel filter and fuel pump. Ran about 10 miles and still same problem. Checked the codes with my superchip programmer and it showed 5 codes
P1280 icp
P0475 exhaust back pressure sensor
P0733 gear 3 ratio error
P0732 gear 2 ratio error
P0541 manf air intake heather circuit low.

Cleared the codes reran it and the codes
P1280
P0475
Still remained
I removed the icp plug off the sensor and there is a light skim of oil in the plug. Also it act like it ran worse with it unplugged. I'm stumped
What do you guys recommend? Icp sensor anyway? Cops sensor? Ipr sensor maybe? Under valve cover harness? Don't think it's an injector because it doesn't do it all the time
Please any help would be appreciated!
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post #2 of 7 Old 11-12-2013, 05:19 PM
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Well lets change cps, you will always hear that first.Then disconnect any chip ,programer you might have. Can you monitor ICP, how much fuel in the tank?
Where are you located , maybe somebody is close and can help you out. Did you drive it with the ICP unplugged?

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post #3 of 7 Old 11-12-2013, 06:03 PM
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The connector on the IPR has always been a problem wiggle it with it running and see what happens. Check the tin nut on the IPR, make sure its not loose.

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
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post #4 of 7 Old 11-12-2013, 06:28 PM Thread Starter
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I'm located in SC 1/4 tank of fuel not sure on how to monitor icp and it didn't run to good with it not plugged in I will check the ipr tommorow
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post #5 of 7 Old 11-13-2013, 08:00 AM
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There has been an on going problem with the fuel pickup especially when about 1/4 tank. I had this problem 4 yrs ago. as long as I kept the tank above 1/2 ,there was no problem . Drove from Houston Tx to buffalo ,ny like this. Did the hutch mod , never had the problem again.

2000 F250 King Ranch Crew Cab 7.3L LB 4X4 100% home brewed Biodiesel
ZF6 6SPD trans
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4" straight exhaust with 5" tip
Isspro 3 Gauge Pod
285/75/16 Cooper ATP on factory 16's
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post #6 of 7 Old 11-13-2013, 11:39 AM Thread Starter
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your truck was doing the same thing mine is doing? acting like it running out of fuel then would crank right back up?

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post #7 of 7 Old 11-17-2013, 09:35 AM
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I had the same issue a few months back

Took it to a GOOD Ford shop locally and they diagnosed and fixed the issue within 5 min.

Replaced the ICP sensor.

They even gave me their cost on the part and charged me no labor. (Lucky)

They also told me it is always the IPR or the ICP.

Hope this helps you out.

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