Please help 1997 7.3 - Ford Powerstroke Diesel Forum
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Old 11-18-2010, 12:31 PM
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Exclamation Please help 1997 7.3

i switched to stage 2 injectors monday night, started the truck it wasnt on all 8 cylinders and smokeing heavy so i unplugged each injector found out witch two were not fueling and pulled them cleaned them put them back in the truck was running on all 8. seemed to be running good. so i went for a test drive and got about a mile and the truck seemed to loose all power and stall. hard to restart but once it restarted it would run ruff then clear up so i would turn the truck around to drive it back home and it would do the same thing well i let it run on high idle for 10 mins it seemed fine reved the engine and seemed strong so i took it back up the road went about 3 miles and it acted like it ran out of fuel and wouldnt restart.

i did the following to it,
ran the scan tool said crank sensor faul put the crank sensor in (rpm gage works)

new icp sensor
new idm
new pcm
new crank sensor
un hooked the tw chip still no start
the hpop oil level is about 1/4 below the plug.
ran a buzz test on all 8 injectors all 8 worked,

im running out of ideas any help would be nice thanks
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Old 11-18-2010, 12:36 PM
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I think you have to purge the air out of the oil rails but i might be wrong.
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Old 11-18-2010, 12:42 PM
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after i installed the injectors with the glow plugs out i cranked the engine over for 2 20 second cranks. the put the glow plugs in and cranked 3 20 second runs to build oil pressur then plugged the harness in and started it.
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Old 11-18-2010, 06:13 PM
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bump for ya.
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Old 11-18-2010, 09:00 PM
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Sounds like there is still air in the system to me. give it up to 50+ miles before all air is worked out
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Old 11-18-2010, 09:04 PM
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x2 on the air. its a hard system to bleed
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Old 11-19-2010, 12:18 PM
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but the truck wont even start and i can get it started after bleeding the system?
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Old 11-19-2010, 02:08 PM
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ok Get a friend. and while turning over the truck put your thumb over the HPOP reservoir plug. and kinda burp the system. you will get a little messy. but it will give the air a place to go
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Old 11-20-2010, 05:34 PM
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Take it down the freeway just a getin it and you won't have a issue if its air. <<<No joke
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Old 11-23-2010, 04:24 PM
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you mean cam sensor?

to me it doesnt sound like you have air in the rail, and if you did it would not run well at all untill it was all out. so if the truck ran well at all. i would rule air in the oil rail out. if you still have a scan tool look at the datastream wile cranking. needs to be about 400-450psi to start. does the truck smoke wile cranking? could be you IPR, you have replaced everything else lol. why did you get a new IDM and PCM?
do you have a stock 15*?
i just helped a buddy do a 7.3 rebuild. with dry heads and a empty HPOP we would have to take the plug out of the top of the resivoir and add a little less that a quart of oil (if you add more than a quart it will just flow down to the oil pan at the bottom of the engine) crank the truck for about 5-6 seconds and refill again. remember to install the plug on the top of the resivoir every time you crank. did this about 5 times abd the truck started and ran great! smoke cleared up within 5 min.
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