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7.3 idi problem

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Old Apr 12, 2017 | 10:54 PM
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7.3 idi problem

Hello everyone I just transplanted a 7.3 idi into my 1980 f150 mudtruck. I can't get it to run right it idles fine but I go to rev it up and it sounds almost like it is backfiring and won't go past that rpm it's smokes when it does it. At night I can see flames out the exhaust. I thought is was return lines so I replaced them. I took a video of it

 
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Old Apr 12, 2017 | 11:04 PM
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From: O-O-O-Oreilly's
How old are your injectors?
 
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Old Apr 12, 2017 | 11:09 PM
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I don't no. Don't even know the mileage of the engine I pulled the injectors and they said United technology's
 
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Old Apr 13, 2017 | 12:12 AM
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Loosen the three injector pump mounting nuts and rotate it towards the passenger side, that will advance the timing. Seems like it's a good chance that's what it is,

​​​​​​​She sounds nice m8
 
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Old Apr 13, 2017 | 12:15 AM
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I will try that thx
 
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Old Apr 13, 2017 | 12:24 AM
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I recommend using a big pair of channel locks to grab the pump and rotate it, metal lines can be a pain, probably wouldn't hurt to change the fuel filter if you haven't yet.
 
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Old Apr 13, 2017 | 12:26 AM
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Ok ya I changed everything when I did the return lines
 
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Old May 16, 2017 | 04:20 AM
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Originally Posted by DarkOverCast
Loosen the three injector pump mounting nuts and rotate it towards the passenger side, that will advance the timing. Seems like it's a good chance that's what it is,

​​​​​​​She sounds nice m8
thanks for the help. i bought new injectors and had the same problem. so i advanced the timing runs great now. thanks again.
 
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Old May 16, 2017 | 10:09 PM
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Yup, retarded timing is almost a certainty when using an older pump. New injectors just make it worse.
 
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Old May 16, 2017 | 11:33 PM
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Originally Posted by stirling35
thanks for the help. i bought new injectors and had the same problem. so i advanced the timing runs great now. thanks again.
That's what this forum is for! I'm glad we could both do your truck some justice
 
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