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Old 04-01-2012, 07:19 PM
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96 powerstroke no start

Hi, i have a 96 f250 7.3l,auto 4x4 and last week i went to start it after work and it started, ran for about 5 seconds and stalled and would not restart. While it was running i noticed it didnt show any oil pressure on the gauge, so i checked the HPOP res and it was empty, filled it up and it fired right up and stalled about 5 seconds later. Checked it and it was empty again so i thought the LPOP must be bad since it wasnt refilling the reservoir so i replaced it with a melling pump and it didnt help. Then i thought it could be the pickup tube, so i overfilled the oil and jacked the rear of the truck up and still nothing. Any help would be appreciated
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Old 04-01-2012, 08:06 PM
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If I am not mistaken, I believe that you have to prime the LPOP before you put it in. I havent done it myself but maybe someone who has will chime in...
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Old 04-02-2012, 05:49 AM
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i did put some oil in the pump before i installed it if thats what you mean by priming it
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Old 04-03-2012, 05:53 AM
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Anyone else have any ideas?? read something about a de aeration check valve, would my truck have that? is a 96 but it is an early 96, thanks.
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Old 04-03-2012, 12:55 PM
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Is the CEL on? You need to make sure the IPR wiring is good, the tin nut is there and snug, and that the IPR is getting powered. If the IPR is not functioning, it will just drain. My 94 had similar issues, but it set the P1283 code for the IPR power circuit. It ended up being the PCM in my case. Cheers!
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Old 04-03-2012, 03:32 PM
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Im not positive, but i think its not the IPR because if i fill the reservoir up manually it starts and runs smooth for like 5 seconds but the oil pressure gauge never moves, and i recently replaced the IPR . but sometimes while im cranking the CEL comes on but if i turn the key off it goes away
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Old 04-09-2012, 06:04 AM
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The other day i took the oil filter off and tried cranking it and nothing came out at all. does that mean the lpop is not picking up oil?
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Old 04-09-2012, 04:14 PM
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Quote:
Originally Posted by 96f250ps View Post
The other day i took the oil filter off and tried cranking it and nothing came out at all. does that mean the lpop is not picking up oil?
Ouch, hopefully one of the guys that has experience with replacing them can give some insight....
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Old 04-09-2012, 04:33 PM
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With the pump removed, try blowing air (slowly) in the lower recess of timing cover. Listen for air bubbling in the oil pan. You may have a cracked or plugged up oil pickup tube.
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Old 04-10-2012, 05:44 AM
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thats what i was thinking, im gonna try that after i get home from work. Thanks guys
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