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Message: [QUOTE="TyCorr, post: 369739, member: 1451"] The idm doesnt know that the inj are being fed via a high pressure fuel rail. Or that anything.is different for that matter. As for reversing this and getting it to run a 6.4 psd im not sure other than people who.have put 6.4s into obs trucks dont do it.that way for whatever.reason. Id speculate its due to the computer being able to.control all the bs on a 6.4 that a 7.3 doesnt.have. There.may be some sensor input that the older pcm wouldnt recognize. As for just firing the inj on a 6.4 I dont see why the obs or sd couldnt. It obviously works when swapped onto a 7.3 block. [/QUOTE]

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