7.3 turns over but not running - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 05-09-2013, 05:50 PM Thread Starter
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7.3 turns over but not running

A friend of mine has a 2003 7.3 and it has been running perfectly fine. He was backing a trailer and didn't see the tree and well you can guess the rest. He hit it so hard it bent his draw-tite hitch, he pulled up off the tree and then turned his truck off. We looked over the bent bumper etc. and he attempted to crank the truck with no luck. I thought at first it was the fuel shut off switch on the passenger kick panel but not it. Checked fuses and none are blown, all dash lights are coming on and fuel pump is working and pumping hard. Anyone heard of this happening? Maybe some wires got knocked loose? Why wouldn't it have died before he turned it off then?
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post #2 of 15 Old 05-09-2013, 05:59 PM
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Very interesting. Would like to know too.



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post #3 of 15 Old 05-09-2013, 06:10 PM Thread Starter
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Originally Posted by jesilvas View Post
Very interesting. Would like to know too.
yeah, me too since it's in my front yard now. When ether is sprayed into the intake it cranks up..so it's simply not getting fuel for whatever reason. Maybe i missed a fuse? (even though i checked 3 times)
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post #4 of 15 Old 05-10-2013, 05:55 AM
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My usual No Start -


WTS Light? - do you get it when you first roll-on the key? (shows the computer is running)

Is there fuel in the fuel bowl now? Does it refill after cranking? (open the drain level to check)

Can you hear/feel the pump running (below the dr seat, against the framerail)

Could the fuel gauge be giving a bad reading? (Below 1/4 tank?)

Is your truck "chipped"? If so, remove it as a Test.

AND, on another note, STOP using Either before you damage the engine!
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post #5 of 15 Old 05-10-2013, 08:15 AM Thread Starter
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Originally Posted by NoRalPh View Post
My usual No Start -


WTS Light? - do you get it when you first roll-on the key? (shows the computer is running)

Is there fuel in the fuel bowl now? Does it refill after cranking? (open the drain level to check)

Can you hear/feel the pump running (below the dr seat, against the framerail)

Could the fuel gauge be giving a bad reading? (Below 1/4 tank?)

Is your truck "chipped"? If so, remove it as a Test.

AND, on another note, STOP using Either before you damage the engine!
yeah all lights come on. yes fuel in bowl...it refills, it's not chipped in any way. I know not to use ether but it was the only way to see if it was firing. It won't be used again trust me and i used as little as possible.
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post #6 of 15 Old 05-10-2013, 08:19 AM
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I'm assuming the ether was/is used because originally the glow plugs needed replaced and weren't?

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post #7 of 15 Old 05-10-2013, 08:24 AM
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CPS?
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post #8 of 15 Old 05-10-2013, 10:10 AM
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battery disconnect for 5 min or so may allow the truck to start
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post #9 of 15 Old 05-10-2013, 10:29 AM
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Quote:
Originally Posted by Neil26 View Post
yeah, me too since it's in my front yard now. When ether is sprayed into the intake it cranks up..so it's simply not getting fuel for whatever reason. Maybe i missed a fuse? (even though i checked 3 times)
Aaahhh. Nooo. Don't use Ether on a Powerstroke. Very very bad. If you need to use a something to assist in startup, i.e. ether, USE WD-40. Works great.

I think you may have missed a fuse. You have fuel up to the bowl but the injectors are not firing. Could be cps, could be fuse for the IDM. If its the IDM fuse the jarring may have finally caused the fuel bowl heater to short since its on the same circuit. If so, then just unhook it and replace fuse.

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post #10 of 15 Old 05-10-2013, 04:45 PM Thread Starter
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Originally Posted by hucorey View Post
Aaahhh. Nooo. Don't use Ether on a Powerstroke. Very very bad. If you need to use a something to assist in startup, i.e. ether, USE WD-40. Works great.

I think you may have missed a fuse. You have fuel up to the bowl but the injectors are not firing. Could be cps, could be fuse for the IDM. If its the IDM fuse the jarring may have finally caused the fuel bowl heater to short since its on the same circuit. If so, then just unhook it and replace fuse.
Yeah, I will check the fuses again. I'm not sure if he wants to spend the money for cps, he may just take it to the ford dealership. As far as ether..it won't be used again..it was only a one time thing. Thanks for the help

this online manual says it's 105 (30A) if that's the case it's a big square one with a clear plastic cover on it, checked that one and it's looks good and tests good as well.
http://www.motorcraftservice.com/pub.../03f23og1e.pdf
maybe wrong manual?
I'm thinking about checking the pcm relay next

Last edited by Neil26; 05-10-2013 at 07:41 PM.
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