96 7.3 Cranked ran then died - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 12-31-2009, 08:59 AM Thread Starter
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96 7.3 Cranked ran then died

Hey guys. Kinda a newby when it comes to working on diesels. Im a mechanic by trade but on gassers. Dads 96 7.3 went down yesterday and i need help figuring it out. My mom was driving the truck and it started when she left the att store and as she was leaving went over a speed bump and it quit. Wheres a good place to start? I dont have any diag tools available to me right away just need a good starting point. Also for the past few months, we have noticed when downshifting or slowing down, the truck would kinda hiccup. It would shut off just for a half second the run fine. Any help would be appriciated.
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post #2 of 12 Old 12-31-2009, 09:07 AM
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I would pull the valve covers off and check the wireing harness that goes to the injectors. some times it will just come unhooked.

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post #3 of 12 Old 12-31-2009, 12:55 PM Thread Starter
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Alright charged the batteries and the cps is ok. Spun the truck over and the rpm gauge moved. Seems like its not getting fuel. Any thoughts? What bout the ipc switch?
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post #4 of 12 Old 01-01-2010, 12:32 AM
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my guess is fuel, maybe fuel pump, best way to check is to empty your fuel bowl, yellow tab right behind the fuel bowl, then take off your water seperator/fuel filter, turn you key to the on position and then run back to see if the fuel bowl is filling as a responable rate, sorry dont know what it should be for the older 7.3s. if it is not filling very quickly or not at all i would bet its the fuel pump

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post #5 of 12 Old 01-01-2010, 01:10 AM
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cowboyboots. that process is a proper way to check the fuel pump. however on the obs trucks 97 and down theres a lift pump which is mechanically drivin off the cam in the block. so crank the truck to see if it pumps fuel into the housing. the 99sd and up have the electrical fuel pump which having the key on fills that up.

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post #6 of 12 Old 01-01-2010, 01:48 AM
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if the pump is bad it will start leaking and it will struggle to fill the fuel bowl if at all,your fpr fuel pressure regulator may be bad or clogged up OR you may have a similar problem I did, I thought I was having fuel problems until i pulled the injectors and actually stuck a feeler down through the injector cups, there was coolant in the cylinders and in the oil, turns out my truck was dieing and runnin like crap cause it was drownding basically.might be a issue with yours, sounds crazy but drain your oil and check it out closely.If neither of those is the issue, U might take a look at either your fuel pick up in the tanks or the injection pressure , and possibly the HPOP from there

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Now that's F****ing Balls Do they clink as he walks???
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but I guess the porno red interior made you lose interest
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post #7 of 12 Old 01-01-2010, 10:46 AM
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I was having problems with my 99 last year and at first it started out as just hiccuping going down the road, almost like dying and restarting without me having to restart, then at other times it would die when I came up to a stop light and then I could restart it right away and then it got to the point it wouldn't even start. It did throw a check engine code when it did it, but the code would clear after a while. It ended up being the camshaft position sensor it it located down below the main pulley on the engine. I replaced it and it ended the problem. Also for my year truck, Ford ended up sending me a recall letter shortly after I replaced it.
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post #8 of 12 Old 01-02-2010, 12:33 AM
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sorry about that, i have not worked on many of the old 7.3L, just brakes, clutches, and a coupel of other things. hope you get it figured out

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post #9 of 12 Old 01-02-2010, 12:44 AM
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UVC Harness

It's already been mentioned, but the speed bump and then quit makes me think an UVC harness shook loose.

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post #10 of 12 Old 01-03-2010, 05:19 PM
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anything new on this yet???

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Quote:
Originally Posted by Twinjracing View Post
Now that's F****ing Balls Do they clink as he walks???
Quote:
Originally Posted by alberta 7.3 View Post
but I guess the porno red interior made you lose interest
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