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Old Apr 25, 2014 | 07:26 AM
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Truck stalls while driving

Just a little background, 2002 F-250 with the 7.3 284,000 miles. I just bought it. Doesn't seem like the PO did much other than changing oil, filters, etc. Anyway the last 2 days as I'm driving the truck will do a quick misfire like action and then it dies. I have had it do the misfire without it dying about three times, but twice it has died immediately. It won't start back up right away, but if I come back to it later, it fires right up. Changed the CPS yesterday after the first bout, and still had the problem today. After reading through several posts, I'm thinking maybe IPR, maybe even the seals on the IPR? Or maybe the fuel screen in the tank? What do you guys think? Thanks.
 
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Old Apr 25, 2014 | 07:31 AM
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Those symptoms are pretty much exactly what a CPS dying will cause. Did you use an aftermarket or OEM sensor when you replaced it?
 
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Old Apr 25, 2014 | 07:46 AM
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Aftermarket (hangs head in shame).
 
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Old Apr 25, 2014 | 07:51 AM
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The after market sensors have a reputation for being susceptible to RFI (radio frequency interference). Probably the best thing to do would be to pick one up at the nearest dealership and see if it cures the problem before spending time and money on other things.
 
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Old Apr 25, 2014 | 08:53 AM
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Is there a way to test the CPS and see if that's it?
 
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Old Apr 25, 2014 | 09:00 AM
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No, not really. Sometimes it will set a soft code, but not all the time. The new sensor should only be about $30 from a dealer. Keep the aftermarket one in your glove box for an emergency spare.
 
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Old Apr 25, 2014 | 11:10 AM
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Any other guesses?
 
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Old Apr 25, 2014 | 04:53 PM
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Thanks for the insight Pikachu
 
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Old Apr 25, 2014 | 05:35 PM
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Originally Posted by TN Floorman
Any other guesses?
Have you replaced the CPS yet? That suggestion wasn't in vein. Its textbook CPS failure.

Use only an OME sensor. Riffraff has them for sale
 
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Old Apr 25, 2014 | 05:39 PM
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Originally Posted by TN Floorman
Thanks for the insight Pikachu
Did a new sensor seem to solve the problem?
 
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Old Apr 25, 2014 | 05:53 PM
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Havent been able to get one from the dealer yet.
 
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Old Apr 25, 2014 | 06:02 PM
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Oh. Well, in the meantime you could make sure the tin nut that holds the spacer and solenoid on the IPR is tight. If it's loose, it can affect the way the truck runs.
 
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Old Apr 25, 2014 | 06:24 PM
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Ill look into that too. Where is the spacer on the IPR? I assume the tin nut is obvious if I look at the IPR. Thanks.
 
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Old Apr 25, 2014 | 06:29 PM
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The spacer is directly behind the solenoid, between the solenoid and the nut. It actually looks like it's part of the solenoid at first glance.

 
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Old Apr 25, 2014 | 07:46 PM
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Thanks again. I've been having an oil leak, that I was trying to trace down too. Do you think it's possible the leak is coming from the IPR and that was causing my stalling problem? Or is it not likely to leak from the IPR?
 
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