95 7.3 Oil pressure spike no start - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 08-20-2013, 03:45 PM Thread Starter
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95 7.3 Oil pressure spike no start

alright so my truck was running perfect went to start it one day.Turned over strong and about every 5 seconds it will try to start ill hear the injectors start moving an all. then it will just quit. I put a new HPOP, IPR,computer, IDM, and tryed the ICP sensor. Nothing changed. Please help this trucks been down for 2 months. when it spike after cranking for 5 seconds the oil pressure is about 800 psi
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post #2 of 9 Old 08-22-2013, 11:35 AM
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CPS? Fuel pressure while cranking? Fuel bowl full and staying full after cranking? HPOP full and stays that way?
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post #3 of 9 Old 08-24-2013, 04:46 PM Thread Starter
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thanks for the response. It has a new CPS and the pressure at the bleeder is 10psi while cranking. fuel bowl is staying full. and not filling up after i drain it. Im think its my 3month old fuel pump in the valley.
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post #4 of 9 Old 08-24-2013, 04:47 PM Thread Starter
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new HPOP ,IPR ,CPS,computer ,IDM, ICP
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post #5 of 9 Old 08-24-2013, 05:13 PM
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Cranking pressure in fuel system seems a little low. If the fuel bowl isn't filling back up, either the fuel pump isn't supplying enough fuel or there is a restriction in the supply line.
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post #6 of 9 Old 08-25-2013, 02:43 PM Thread Starter
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alright so the water separator screen was pretty gunked up. But I cleaned it real good and it still wont fire.. this thing is really starting to confuse me. O and I put fresh fuel pump on it to. Could it be something with the tank pumps? I tried switching tanks and staring , theyre both pretty much full.Thanks
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post #7 of 9 Old 08-26-2013, 07:29 PM
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Possibly. Are you getting pressure in the fuel system at all?
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post #8 of 9 Old 08-28-2013, 03:50 PM Thread Starter
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Alright so cranking pressure is about 20psi at the shrader valve. I have a new HPOP,IPR ,ICP sensor,CPS,FPR mod done, clean fuel filter, fresh oil change. Tach moves while cranking,WTS light is good and when i swich tanks they both read different, my question is if im getting a reading from both tank levels does that eliminate tank selector/valve?
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post #9 of 9 Old 08-30-2013, 08:11 PM Thread Starter
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its got good fuel pressure.but could there still be air in the fuel causing the truck not to start.? It sounds like its so close to starting it will go from the average 200rpm crank to 5-600 like its going to start. Then just keep repeating this. I was thinking it could have been the fuel pump to start then air got in the system and now it wont fire.
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