Issues with truck not starting - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 02-27-2013, 07:28 PM Thread Starter Rookie
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Issues with truck not starting

First off hello this is my first post on here. This board is great. I have learned so much reading everyones posts.This morning My 97 F250 fired up for about 15 seconds then died and would not restart tried again few hrs later same thing. Tried again 4 hrs later stayed running till i shut it off after 5 min. Pulled codes got 0340 and 0344. So changed cps w/ A factory one. Truck started right up as normal and test drove for 45 min. Let sit for hour and half same thing only this time ran 2 seconds then died. I replaced ipr with a new ford ipr a year ago when i bought truck. I checked ipr wires dont seem shorted out. Cps wires looked good. Tried unpluggin icp and still wont run. Fuel pressure is 40 psi at cranking. New lift pump 6 months ago also replaced little blue fuel lines. Loosened fuel return at regulator and fuel sprayed. Hpop is full. Could it be the idm is intermittent? Never had a running problem till today. Truck has 254,000 miles located in Fl so its not cold. Also no smoke out of exaust so i'm thinkin not getting fuel. Sorry for long first post but could use some help. Thank you Jason
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post #2 of 3 Old 02-28-2013, 06:05 AM
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Pop the valve covers and look for burned UVCH connections. You could just pop the oil cap off the passenger side and the CCV dog house off the driver side and give a good sniff, if there are any burnt connections you should be able to smell the plastic. If you pop the CCV dog house off, be sure you have some new 1-1/4" ID x 1-1/2" OD O-rings on hand because I'd bet a bottle of good bourbon whatever is in there now will be stretched out and difficult, if not impossible, to get to fit right and seal again.

97 F350 CCLB 4x4 PSD
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post #3 of 3 Old 03-05-2013, 02:21 PM Thread Starter Rookie
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Ok problem solved I went through fuel bowl and installed new o rings that I've had on hand for a few months but was pretty confident that wasnt the problem. Truck would sputter if held a gas soaked rag at air filter so knew it wasnt getting fuel. Noticed on scanner there where no rpm reading while truck was turning over. So went looking into cps further. I had the ground, refernce signal, and output at the sensor. I could simulate the sensor functioning by placing a wrench against sensor and then moving it while monitoring the output voltage which verified the cps is functioning correctly. I removed the large plug going to pcm thinking I had a break in the output signal wire from cps to pcm and found moisture and corrosion on pcm pins and plug. Cleaned both with contact cleaner, truck was showing rpms on code reader and fired right up. Thanks very much for your information everyone on this board. My next check was going to uvch.
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