1997 - 2003 Ford F150 General discussion on the Ford 1997 - 2003 F150 truck.

2000 5.4 2v falls when warm

Old 01-12-2014
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Default 2000 5.4 2v falls when warm

I have a 5.4 2v that falls flat only when warm. Has about 20k miles on a reman motor. Computer wont always through codes but when it does there too many and seem unrelated at this time. codes: fuel sender open circuit, pats system, theft dected, key transponder, #6 & 7 miss fire. Maf sensor, bank 1 o2 sensor.... corrective steps tanken, replace o2. 6&7 coils replaced, cleaned maf. Any help on this would be greatly appreciated.
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Old 01-13-2014
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Did you pinch any wires when putting the new motor in? Did you replaced the motor with the same year and size of the old one?
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Old 01-13-2014
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The motor swap was done a year before having this problem. Although this is what it did before I lost the original. Motor is same year and size. No changes.
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Old 01-14-2014
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If this is doing the same as it was before you changed your engine, then i suspect your ECM is bad and probably needs to be replaced.
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Old 01-14-2014
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yea, thats what i was leaning to, ill start there and see what happens
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