93 Running rough.
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Freshman User
Joined: May 2016
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93 Running rough.
93 f150,5.0 engine manual trans. Yesterday out of the blue it started running rough. Today I put in new plugs and no diff. It skips real bad at 40 mph in third under a mild load. Once the rpms are up around 2-3000 it' ok. Wires were changed three years ago. Any ideas. Engine has 214000 miles on it and has been good up to now. Old plugs were worn but fairly clean with no oil fouling on them. I don't know anything about o2 sensors pcms from PMS.
Cargo Master
Joined: Mar 2010
Posts: 3,338
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From: Laramie, WY
93 f150,5.0 engine manual trans. Yesterday out of the blue it started running rough. Today I put in new plugs and no diff. It skips real bad at 40 mph in third under a mild load. Once the rpms are up around 2-3000 it' ok. Wires were changed three years ago. Any ideas. Engine has 214000 miles on it and has been good up to now. Old plugs were worn but fairly clean with no oil fouling on them. I don't know anything about o2 sensors pcms from PMS.
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