Still wont start - Ford Powerstroke Diesel Forum

 
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post #1 of 10 Old 01-29-2011, 03:46 AM Thread Starter
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Question Still wont start

I need some fresh advice. I've got a 99 f250 that won't start or even hit. The history is simple. It would die without any warning and under any situation.sometimes I would have to work on it for ten minutes sometimes for ten hours (literally) then with no rhyme or reason it would just start and run like nothing was ever wrong. The problem became more frequent now hasn't started for months. Havefuel at the filter (both pressure and volume). Have changed the CPS. I'm convinced the problem is electrical as it won't even hit or bump on a shot or two of ether. Somebody give me some fresh ideas or info. Thanks
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post #2 of 10 Old 01-29-2011, 06:03 AM
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Originally Posted by backstroke View Post
I need some fresh advice. I've got a 99 f250 that won't start or even hit. The history is simple. It would die without any warning and under any situation.sometimes I would have to work on it for ten minutes sometimes for ten hours (literally) then with no rhyme or reason it would just start and run like nothing was ever wrong. The problem became more frequent now hasn't started for months. Havefuel at the filter (both pressure and volume). Have changed the CPS. I'm convinced the problem is electrical as it won't even hit or bump on a shot or two of ether. Somebody give me some fresh ideas or info. Thanks
Does your "wait to start" light come on when you turn the key?

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post #3 of 10 Old 01-29-2011, 06:08 AM Thread Starter
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Yes the wait to start light comes on and seems to cycle and function properly.
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post #4 of 10 Old 01-29-2011, 06:55 AM
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Check your IDM, ( injector drive module ) swap it with a buddies or a junk yard one.. these are known to randomly do this!

drivers side fender..

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME dakinbryce@hotmail.com..ill gladly answer any of your questions. OR search me on facebook. ill help out anyway I can !

updated as of OCT 28/2013

Last edited by 03_Turbo7.3; 01-29-2011 at 07:00 AM.
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post #5 of 10 Old 01-29-2011, 07:06 AM
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Get a scan tool and monitor the IPR and ICP. The IPR has to see a minimum of 500 psi to start. The ICP should show a minimum of .85v-.90v when cranking.

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post #6 of 10 Old 01-29-2011, 07:32 AM
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he can always unplug the IPR it will default and will attempt to fire..if thats the case..

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME dakinbryce@hotmail.com..ill gladly answer any of your questions. OR search me on facebook. ill help out anyway I can !

updated as of OCT 28/2013
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post #7 of 10 Old 01-29-2011, 07:33 AM
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he can always unplug the IPR it will default and will attempt to fire..if thats the case..
True

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post #8 of 10 Old 01-29-2011, 01:08 PM
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I think you're confusing the IPR with the ICP though,,,, If you unplug the IPR it's not going to do that, the IPR actually does the pressure regulation.

It's the ICP you can unplug and by doing so the PCM will default to a limp setting and control the pressure (through the IPR) at that setting.

You can visually inspect the IPR for a good connection, loose nut on the coil, or even "tap" it if it's sticking but don't unplug it
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post #9 of 10 Old 01-29-2011, 05:18 PM
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Originally Posted by NoRalPh View Post
I think you're confusing the IPR with the ICP though,,,, If you unplug the IPR it's not going to do that, the IPR actually does the pressure regulation.

It's the ICP you can unplug and by doing so the PCM will default to a limp setting and control the pressure (through the IPR) at that setting.

You can visually inspect the IPR for a good connection, loose nut on the coil, or even "tap" it if it's sticking but don't unplug it
I think the 7.3 trucks are different than the 6.0's. But, maybe not

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post #10 of 10 Old 01-29-2011, 07:44 PM
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Quote:
Originally Posted by NoRalPh View Post
I think you're confusing the IPR with the ICP though,,,, If you unplug the IPR it's not going to do that, the IPR actually does the pressure regulation.

It's the ICP you can unplug and by doing so the PCM will default to a limp setting and control the pressure (through the IPR) at that setting.

You can visually inspect the IPR for a good connection, loose nut on the coil, or even "tap" it if it's sticking but don't unplug it
yup my bad, unplug the ICP it will default to 4999 and run fine.. you cant do much with the IPR just watch it on the scanner..

05+ coils, 10 Rear diff, box, tailgate, lights, bumper, Full 07 front harley swap...the list is endless.

AS IM RARLEY on here anymore...have a question ?? EMAIL ME dakinbryce@hotmail.com..ill gladly answer any of your questions. OR search me on facebook. ill help out anyway I can !

updated as of OCT 28/2013
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