truck dies without arning.

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May 16, 2009 | 04:24 AM

#16

Oversize

Laughing Gas

Joined: Feb 2009

Posts: 921

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From: Denver CO

X2 on the codes
P1280 ICP out of range
P344, P340 CPS problems
P930 according to my stuff doesnt exist
Id start w/ changing your CPS and then see what else it does or what left.

May 16, 2009 | 08:38 PM

#17

89ford73

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ok now it is really dead!!! keeps throwing cps code, but i put a new one in and still no start, keeps throwing the code. the tach goes to about 300 rpms when its plugged in while cranking, and it does not move at all when the cps is unplugged. i swapped out idms my idm is still good. its not fuses or relays.

May 16, 2009 | 09:03 PM

#18

89ford73

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ok, my truck is really dead now. it wont start. it ran good for about 20 mins. and then when it died, it died for good, swapped idms with my friend, both work in his truck, neither work in mine. im about to yank the motor out!! i got an old school 7.3 and i got a cummins.

May 16, 2009 | 09:07 PM

#19

89ford73

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i have a set of valve cover gasket wiring harnesses. im thinking about swapping them. i keep throwing the cam position sensor code. im about to pull the cps out of my friends truck cuz i know it works.

May 17, 2009 | 01:37 AM

#20

sbxworship

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Joined: Aug 2007

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From: Morehead City, NC

did you do anything with ICP sensor? you said you changed the CPS, but it was coding ICP out of range, too. I've fixed a similar no-start situation by removing the IPR, tearing it apart, cleaning it up really good, and putting it back in, FWIW. Just remember it's going to drain the HPOP. Wow, that's a lot of acronyms. lol.

May 17, 2009 | 08:57 AM

#21

paddler

More Turbo

Joined: Dec 2002

Posts: 664

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From: Columbia, MD

PCM connector?

With all the other parts you're throwing at it, it may be worth a try.

Pull the connector, spray electrical contact cleaner on both sides, maybe light scrub with an old toothbrush (make sure no bristles get left in the contacts), let dry, then reconnect and tighten down. Maybe 10 minutes to do.

I put an aftermarket chip on my truck. Chip piggybacked onto the PCM, but later came loose. Ran fine, but when it rattled and the connection broke, the engine just totally died. No sputtering or low power, just flat-out turned off.

Your issue is different, but sounds like it could be similar. The codes might be caused by open circuit or high resistance on the connections for those sensors. Heat (engine, or from high-resistance connection) or vibration might be why it takes a while for the problem to show up.

May 18, 2009 | 11:41 PM

#22

89ford73

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well. took it to the dude that works on these psds for his hobby, and he first thought that the co nector for the cps was bad so looked at the plug and said it was ok, hut he tweaked the little connector ends anyways and that wasnt the problem. so he hooked his computer up and it said that i had only 175 psi oil pressure coming from the hpop so he thought it was bad, i pulled it off and he tested it to see how much pressure it had, and it went all the way up to 4300 psi just like it should, so works perfectly. he could not test the ipr. what if the ipr electromagnet is going bad? would that make it have no oil pressure?it seems like it would work that way. im going to try that one tomorrow.

May 19, 2009 | 02:13 PM

#23

89ford73

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ok, i put my hpop back on and took the ipr all apart and cleaned it up really good. and i was inspecting the wiring harness going to the ipr. i noticed that the insulation on the wires were melted together. i guess diesel fuel dripped on those wires for a while when my fuel filter light switch was leaking on them. and i am pretty sure those wires were touching each other. now it seems to be running good, im still letting it idle and waiting for the problem to surface again. i have a guage hooked up where the icp sensor is supposed to be. it has 800 idling and 2500 at wot. i am pretty sure that is normal. so if i fixed the problem, it was either the ipr wiring harness, or it was a dirty ipr. thank you all for helping me out. i never would have made it without this forum