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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

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Old Oct 8, 2016 | 01:23 AM
  #1  
SquareBody-F150-93's Avatar
SquareBody-F150-93
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Need help please!

Hey guys whats up? So ive got myself a situation. I put a different engine in my truck (originally a 5.0 didnt upgrade just a new 5.0), and welp things didnt sound to good when we went to fire her up, the thing sputtered and popped like nuts and wouldnt actually "start' unless the gas pedal was halfway to the floor. Im thinking its a timing issue but i want to get y'alls opinion. Thx again guys for the help.
 
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Old Oct 8, 2016 | 07:03 AM
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It could be a large vacuum leak.
 
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Old Oct 8, 2016 | 09:44 AM
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What year truck, and what year 5.0L went in? There was a firing order change at some point in time. You may need to adjust you plug order accordingly.
 
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Old Oct 8, 2016 | 10:13 AM
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Did you break Rule #1 of engine swaps... Do not use any wiring that comes with the donor motor.
 
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Old Oct 10, 2016 | 09:20 AM
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think the firing order change was late 94 and think they were the m.a.f system i have read just recently on here somewhere when doing this swap you keep the original wiring harness but needs the computer from the truck the new motor came from to fire the injectors in the right time as well as making sure plug wires are in the right firing order

i have a 95 block sitting thats rebuilt pulled from old project but i will ditch the injection system/computer on my current 5.0 and go 650 4 barrel when i do the swap
 
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Old Oct 11, 2016 | 10:29 AM
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the truck the motor went into is a 1993 it came out of a 1987, and no i didnt use any of the wiring from the original.
 
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Old Oct 11, 2016 | 11:47 AM
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sry meant to say no i didnt use any wiring from the new engine.
 
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