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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

Crank No Start

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Old Mar 9, 2026 | 04:46 PM
  #121  
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I mean, put the cobra motor in the truck, problem solved!
 
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Old Mar 9, 2026 | 05:12 PM
  #122  
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Originally Posted by 90project5.0
I mean, put the cobra motor in the truck, problem solved!
I've been told that a few times. If it was a half ton I probably would, but I also have a 98 Cobra that needs a motor for the turbo kit that came with it lol
 
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Old Mar 9, 2026 | 05:14 PM
  #123  
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I’ll take the turbo kit if that helps! Or put that on the truck also haha!
 
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Old Mar 11, 2026 | 10:19 AM
  #124  
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Well I cant seem to catch any slack ever apparently. Go to try and leave for work today. Truck starts. Runs fine for a few, sputters, and dies. Crank no start. Fuel pump now continuously runs with the key on. Replaced the relay and that changed nothing. Checked grounds and they seem fine. Didnt smell any burnt wiring or anything. Does stop if the relay is pulled so I dont think its a short. I swear once I can rebuild this thing its getting an entirely new wiring harness. Stupid 80s wiring is the bane of my existence. Any thoughts where to go from here? I checked the other relay that was there too and it seems to be working fine I should add, whatever thats for.

Edit: Just tried to pull codes to see if it would give me any leads. It refuses to pull codes now I guess. Not sure if thats a sign the computer is having a stroke, I hope not but from what I've seen it might be.
 

Last edited by DJ17490; Mar 11, 2026 at 11:55 AM.
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Old Mar 11, 2026 | 01:17 PM
  #125  
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Sounds like computer to me. If you’re handy with electronics, you can replace the capacitors if that’s the problem, usually is.
 
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Old Mar 11, 2026 | 01:22 PM
  #126  
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Originally Posted by 90project5.0
Sounds like computer to me. If you’re handy with electronics, you can replace the capacitors if that’s the problem, usually is.
I'm gonna run a small handful of other tests, then pull it again. I dont imagine it looking any different from the last time but maybe it fried something, or finally completely gave out whereas last time it was only on its way, since it still dont run with the spout connected lmao.

Definitely not handy enough with them, I've mess with them a small handful of times in college here and there but no soldering or anything like that was involved

Edit: Tried some more things. Both fuel relay and ecm relay seem to be working fine. They have good strong clicks. Cant just swap them as they dont fit eachothers sockets though and I have no clue where or if there are any other relays on this truck that would function as a substitute. Pulled the computer out and gonna take it apart later when I can borrow some tiny sockets again. Whatever 4mm or something they are
 

Last edited by DJ17490; Mar 11, 2026 at 02:38 PM.
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Old Mar 11, 2026 | 07:39 PM
  #127  
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Welp. Think that confirms it right there. When i first pulled it open the capacitor was melted to that resistor. Its only separated now cause I touched it to confirm what I saw. Thats unfortunate I guess. Dont really wanna buy a new one cause I was gonna eventually by a standalone probably after a rebuild. Used one I feel like just runs the risk of the same thing happening a little more than I'd like
 
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Old Mar 11, 2026 | 08:36 PM
  #128  
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Find a computer repair shop and see if they will replace the caps. Might be cheap enough or try to solder in a new one yourself! At least you know what you’re facing now. You could try to find a junk yard one, but it would be scarce probably. I haven’t found a 460 in my JY yet. Or… get the standalone now if you can swing it.
 
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Old Mar 11, 2026 | 08:47 PM
  #129  
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Originally Posted by 90project5.0
Find a computer repair shop and see if they will replace the caps. Might be cheap enough or try to solder in a new one yourself! At least you know what you’re facing now. You could try to find a junk yard one, but it would be scarce probably. I haven’t found a 460 in my JY yet. Or… get the standalone now if you can swing it.
I definitely dont have the tools on hand to solder it myself, maybe back home possibly. Could see if there's any places nearby that could repair it though. I tend to agree, and finding one thats the same model number and all that too is a whole nother deal.

I would if I wasnt having to pay the machine shop bill for the Cobra motor lol. Been looking at the Pimpx system for quite some time, cheaper than the holley kits and less hassle it seems like.
 
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Old Mar 11, 2026 | 09:10 PM
  #130  
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A lot of guys like it. I use a DIYautotune megasquirt plug and play. It’s for a mustang, but I made it work pretty easily for the most part.

laptop/home computer repair shop is what I was referring to!
 
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