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Re: 1997 F-150
I have a 1997 F-150 that had the cyl. misfire. I checked everything replaced plugs and cleaned fuel injecters (not with fuel additive but removed and blown out. Checked all voltages, resistance of coil, injectors and plugwires all were good.
The problem was with the connectors in the plug mold to the injecter. They had too much of a gap between them and were not making good contact. I pulled the fuel injectors and twisted the spades just a little where the connectors would make contact.
Disconnect the battery for a minute or so. This clears the DTC code. Then drive for 10 miles or so. Let me know if it fixed it for you. I came upon this fix just after I bought my truck and went over some railroad tracks and lost my bright lights and A/C. Same problem only in fuse box. Seems to be a common problem with this model.
It is a great truck however and now has 226,000 miles and still runs great.
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