1999 Powerstroke No START!!!!! - Ford Powerstroke Diesel Forum
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Old 04-02-2012, 08:57 PM
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1999 Powerstroke No START!!!!!

Hi! Ive got a 1999 F-550 with the 7.3 in it that is very tired so I yanked it out. I have found a 7.3 from a 2003 superduty pickup. motor tag says 2002. Today I went to put it in. Everything seemed to bolt right up wire harness and everything but I cannot get the thing to run! It shouldnt matter which ECM I use should it? It will crank over fine WTS lamp will come on and it will fire on ether. The heads are getting fuel cause I pulled one drain plug and fuel came spraying out. According to the dash gauges we are getting good oil pressure. I put the cam sensor from my old motor to try it but no change. I did a buzz test on injectors and they all sounded fine. there is no smoke out pipe so i dont think its getting fuel past the injectors. Is there any other sensors I should change? Where is the crank sensor? I do not know how long this motor sat at the wreckers. Could it be injectors are stuck? Please help! I dont know very much about these motors!!!!! my customer wants it running! thnx for your help!!
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Old 04-02-2012, 11:58 PM
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First dont use the ether! Your correct that your not getting fuel past the injectors. Your injectors are not firing, and can be several reasons why. You need to check: oil level, make sure hpop resivoir is getting oil, make sure hpop is getting 500 psi to the injectors. Without 500 psi to the injectors, it want start! If all that is good, it could be the IPR or ICP sensors are bad.
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Old 04-03-2012, 02:18 AM
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just want to ask. was this an early 99 f550?
If so, the injectors in the old engine might be different than in the new one.

something else for you to check.
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Old 04-03-2012, 07:53 AM
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Ya my motor is an early 1999. It had 8 new injectors put in shortly before we pulled it out. How can u tell between the early and late style injectors? mine from the original engine say AP 63801 AB on them.
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Old 04-03-2012, 11:58 AM
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Newer style injectors (99.5-03) are "AD" injectors.

I dont know how much that has to do with things, but when you order a chip, they want to know what injectors your running.

Maybe someone with more knowledge will get in here after reading this info.
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