7.3 no power - Ford Powerstroke Diesel Forum
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Old 11-03-2011, 12:04 PM
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7.3 no power

new to this forum but i've been browsing it alot trying to solve this problem i've been having with my truck. 97 powerstroke seems to be defueling. just no get up and go. i've gotten a few codes from it, I had a p0472. messed with the wiring in there, now I have a p0471. can't figure it out. tube is clean and the sensor was replaced. ebpv is deleted. tried the dongles for the ebps and they've done nothing. no cel on, just no power. usually drives kinda well the first 10 seconds after I start it. as far as I can tell there are no exhaust leaks. any ideas?
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Old 11-03-2011, 12:29 PM
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knowing the hpop pressures at idle, and wot would help.
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Old 11-03-2011, 12:36 PM
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need gauges for this? I don't have them. how else could I get you this?
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Old 11-03-2011, 12:41 PM
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its a scan tool(snap on) or software like AE. Buzz tests and the CCT test will help find a bad injector, if you have one.
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Old 11-03-2011, 12:44 PM
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I have a buddy w/ a snap on scanner. I'll get this from him when I can. I wouldn't have other problems if I had a bad injector? she idles perfectly and doesn't smoke whatsoever other than start-up. thanks man.
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Old 11-03-2011, 12:56 PM
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the motor only needs fuel and air. Clogged fuel filter or bad fuel pump "in the center of the motor can do it."
The oil pressure from the hpop is also important, to get the fuel into the cylinders. I would assume a bad injector would cause a skip but not always.
The scanner will test injectors and tell you about hpop issues. You will need a mechanical gauge to test fuel pressure
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Old 11-03-2011, 01:02 PM
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I've changed the fuel filter. cleaned the bowl out. All sorts of **** on the bottom of the bowl. think I should do the pump and see what happens?
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Old 11-03-2011, 02:37 PM
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Theres a screen on the fuel line(actually in the fuel bowl) where the fuel comes in. I dont have one on my superduty but your truck has this screen, it needs to be cleaned off at times. The crap you had to clean out of the bowl had to pass thru this screen. Some
o-rings will have to be purchased to take the bowl apart. and reassemble it. I would start there cause its cheap and good maintenance. Bob guzzle has them
Replacement O-rings for Ford Diesel Engines real nice guy, will answer questions and has all the O rings you can ever need. Do a thread search here on this screen that you need to clean
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Old 11-03-2011, 03:34 PM
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thanks melmount. just ordered the orings so I'll do both the pump and clean the screen out when I get them
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Old 11-03-2011, 05:47 PM
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check your MAP and the hose as well as the fitting in the engine, these commonly plug up with soot. Assuming you are not smoking when you floor it this is more than likely the issue cause the PCM/IDM will not fuel without boost readings

PS, you are chasing you tail without a good scanner
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