Stalling while slowing down to stop - Page 2 - Ford Powerstroke Diesel Forum
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post #11 of 20 Old 07-18-2011, 09:56 AM
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Suspecting my IPR at this point. Should've replaced it when I had the engine out. Doh!

'03 F350 7.3l auto crew cab dually, 'n stuff.
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post #12 of 20 Old 07-24-2011, 04:31 PM Thread Starter
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Well I gave up and turned over to a professional. It was throwing a code indicative of a bad icp even though i had replaced it. He tried another icp, a new icp pigtail, hooked up wiring to break out box to test for shorts, tried a new pcm. Turned out to be a slightly bent pin in the engine wiring harness that was part of the icp circuit. So the solution was to repair the bent pin and works like a champ now. no longer trows any codes.

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post #13 of 20 Old 06-30-2012, 03:15 PM
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UPDATE

Quote:
Originally Posted by bwvick View Post
well just getting back to updating. put in a new icp and still have the problem. strange thing is that if i have the icp unplugged it does not stall (i do get check engine light). i also tried unplugging ebp sensor and still have the problem. sure looks and acts like icp problem. think i am going to have to take it to a professional, it is very frustrating and sometimes embarrassing
I am having the same problem as you did with my 2005 6.0 F250 powerstroke and wnted to know what was the problem I am guessing you solved it or had it solved because you stopped posting Please let me know what you found out. Thanks Tom
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post #14 of 20 Old 07-02-2012, 06:12 AM Thread Starter
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I had a dead #8 cylinder, replaced the engine

2001 F-350 Crew Cab 4X4
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post #15 of 20 Old 07-17-2012, 03:43 AM
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Just encountered the same issues with mine. Same symptoms and all. I, too, had replaced the Cam Censor and ICP. However, it ended up I was given the wrong ICP, so the was switched out and the mechanic put in a new harness for the ICP. Also, the IRP was replaced. He told me that while on computer, when it stalled the oil pressure was taking a dive, causing the motor to shut off. This would happen every time I would come to a stop sign, or just decelerate. My problem was the motor wouldn't roll back over for an hour or so afterwards. Seems to be ok now, but my *** still gets tight every time I stop.
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post #16 of 20 Old 07-17-2012, 10:02 AM
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Quote:
Originally Posted by bwvick View Post
I had a dead #8 cylinder, replaced the engine
That sucks, mine had a dead #8 cylinder, too. I took off the head and found the top of the cylinder wall had a deep groove halfway around the perimeter of the cyinder. I sent the block out and had it sleeved and punched out .30 over.
Still don't know what caused it.
My stalling problem went away when I replaced the IPR valve.

'03 F350 7.3l auto crew cab dually, 'n stuff.
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post #17 of 20 Old 07-21-2012, 07:50 PM
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Find someone with a Auto Enginuity program and have them look at your ICP voltage feedback. KOEO the voltage should be .22 volts. With KOER, look at the throttle feedback, ICP voltage, ICP Pressure, RPM at idle. At idle the ICP voltage should be .22 again and around ,55 volts throttle, around 700-750 RPM and 550 to 700 lbs ICP. The ICP pressure is not a direct read, it is calculated by the PCM on throttle demand and RPM. NOT A REAL PRESSURE READING so don't worry too much about it unless it is way out. The ICP sender feeds directly to the PCM through the 42 pin connector. There is nothing in series with it. With the ICP unhooked you are on a fixed reference voltage or "limp home mode". With the new sender, if the ICP voltage is haywire only two things can be the problem: a wiring issue or a bad PCM. Good luck.
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post #18 of 20 Old 07-24-2012, 09:14 PM
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See my answer in Drop in RPM thread. Six threads above yours.
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post #19 of 20 Old 07-27-2012, 07:06 PM
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My friends has a obs and when ever it started or retured to idle I would go to 400-500 rpm for a second or two and would stall if ya did it when it was cold.. Turned out to be the hpop


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post #20 of 20 Old 08-01-2012, 05:10 AM
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Look at the ICP connector and wiring. These are notorious for causing problems. Ford sells a pig tail kit for them. Also the IPR connector needs to be inspected. It has a compound in it about like play dough. Lousy insulator.
If you have a AE analyzer look at the IPR duty cycle, RPM, ICP pressure, throttle position voltage and ICP feedback voltage while driving and duplicate the conditions that was a problem.

Good luck
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