rebuilt motor need help
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Senior User
Joined: Jun 2007
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rebuilt motor need help
so i have a 2004 f250 i just rebuilt the motor and just put it in the truck today well i tried to start it up and all i get is cranking put no start.... is something i have to do???? i thought by trying to crank on it a few times it would build up oil pressure to shoot of the injectors, but still nothing....
SOMEONE PLEASE HELP...
Thanks,
SOMEONE PLEASE HELP...
Thanks,
Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
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From: Henderson, NV
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Senior User
Joined: Jun 2007
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ok so i tried to get it started and no luck..... i put gas in a rag and put it over the intake and it fired and ran until i pulled it off i figured it would help prime the hpop... so now i have oil pressure put it still wont crank.... i checked all the wiring and grounds and everything seems to be in place.... it has a new set of injectors in it..... can anyone help me???? PLEASE....
Thanks
Thanks
Fleet Owner
Joined: Nov 2003
Posts: 27,872
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What did you do for the rebuild? Was it running before the work was done? I would start by making sure the upper fuel filter had fuel from the HFCM and then verify (if you can) that you are getting at least 500 psig from the high pressure oil system. I know it is basic, but weak batteries can cause all kind of troubles. Are you sure you have good batteries? can you measure the amperage from each bank of glow plugs? Sometines air in the high pressure oil system can cause it to be very hard to start. How much have you cranked on it?
Cargo Master
Joined: Mar 2007
Posts: 3,103
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From: AB/BC
From experence re-check all the wiring to the sensors and that the PCM and FICM cables are locked.
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i bought 2 new batt. today and i also check the fuel filter bowl in the front and it had fuel in the lines going to the head.... not sure what the pressure was.... i also check and re-checked and re-re-checked every wire and harness...
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i cranked on it for about a few hours on and off (let the starter cool off).... HPO system resevoir??? is that the valley under the oil cooler??? if so then no.... but we had it running by putting gas on a rag and putting it over the intake and letting it start with the fumes hoping it would prime the system but no luck.....
Cargo Master
Joined: Mar 2007
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From: AB/BC
The HPO system will take in total on a late build(wavy rail) about three liters of oil to fill.If the resevior is full it can take a almost solid minute of cranking to build enough pressure to fire the injectors.With the system empty it would take alot longer.If it still doesn't start I would pressure test the HPO system for leaks.