Just replaced motor. No Start. help - Ford Powerstroke Diesel Forum
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Old 09-24-2012, 05:19 AM
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Just replaced motor. No Start. help

I had a fresh long block that I installed in my 02 ford 7.3 diesel truck. I did the swap myself. Now that I have everything together the truck turns over really slow and will not start. We could not even hardly turn the motor over with a long breaker bar on the front crank/dampner nut to put torque converter bolts in. I used the starter to put the torque converter bolts in that i wasnt able to reach initially. It is a fresh motor so I am sure it will be a little tight. How hard is it to get these things started? The truck only has 55k miles on it, and i was told it ran without issue before the motor lost compression. Any advice appreciated. I charged the batteries over night and went to start it thismorning, no start... i dont want to crank on the starter super long and break it. Is Either a bad idea for a new motor?
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Old 09-24-2012, 05:51 AM
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I'm not sure why it would be so hard to turn-over, it shouldn't be like that BUT, know that the PCM needs to "see" at Least 100rpm (150/200 is a normal "spin") before it will trigger the IDM to fire the injectors. So, it won't even Try to start if it's cranking too slowly. You gotta figure a way to get it to crank at a normal speed or you're just wasting your time...
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Old 09-24-2012, 07:17 AM
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Ok. Im gonna get some new batteries. Also i tightend injector hold down bolts to 8ft. Lbs. Now i found it should have been 10ft.lbs. anyone see this as an issue
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Old 09-24-2012, 05:03 PM
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Put new batteries in, cranks over much better.... still have not gotten the truck to start. I called a local diesel shop n they said to just keep cranking it and crack the fuel plugs on the back side of each head untill all the air is purged. I dont seem to be getting any air now and am gonna just leave the plugs closed now and hopefully build enough pressure to start. anyone have any ideas or thoughts.
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Old 09-24-2012, 05:07 PM
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You're gonna have to get the air out of the fuel AND oil lines also.
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Old 09-24-2012, 05:15 PM
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Can you explain how to do the oil? I am getting the air out of the internal (inside the head) fuel rails by loosening the caps at the back side of the heads
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Old 09-24-2012, 06:12 PM
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Crank it all out or do the same like the fuel rails.
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Old 09-25-2012, 03:50 AM
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Ok, i will crack a port on each head and see if i get air
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Old 09-25-2012, 04:35 AM
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I cracked the back pipe plug..... no oil???? Hpop junk. It was working before. Motor only has 55 k mi
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Old 09-25-2012, 04:45 PM
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IS the LPoil pump supposed to pump the oil all the way up to the HPOP? I have added oil directly to the HPOP resivor. And It seems to be pushing oil to the oil rails inside the heads. I cant crank on the motor that long because the starter heats up a bunch. Maybe 10 seconds and the starter is pretty hot. Motor still turns over fairly slow with the two new batteries.
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