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post #1 of 2 (permalink) Old 09-12-2003, 12:37 Thread Starter
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fuel injector problems...2001 7.3L DI

2001 E450 started developing intermittent(0-4 times a day) loss/lack of power(miss) at 85,000 after being on the road for 4-5 hours. Shut truck off and restart good to go. When truck returned to shop could not duplicate problem. At 87,000 duplicated problem, coded, cylinder contribution test #1 cylinder. Sent to dealer, replaced #1 injector under warranty. 1 week later same symptoms, sent to dealer, coded #5 injector and replaced. test drove and coded, #6 injector and replaced. We put the truck back on the road. OK until 112,000....same problem....after 4-5 hours loss of power, shut off and restart, it's ok. Very intermittent. Can't duplicate when it returns to base. we replace processor.....same problem. At 115,000 we replace ICP sensoe and IDM. Still same problem. At 117,000 we replace IPR. Still same problem. At 125,000 duplicated and coded #2 injector, replaced 5 injectors not yet changed. At 126,000 same problem, coded #6 injector. Now what???
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post #2 of 2 (permalink) Old 09-14-2003, 14:12
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I have heard of this problem before and it came down to a poor service record and bad fuel. When was the last time the engine had a tune-up? I am assuming your running the turbo 7.3 correct?These engine's require a tune-up also.Is the turbo waste gate sticking open? Are you replacing the fuel filter's on schedule? Air filter's? Do you have a water seperator?

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