Mechanics

CHECK ENGINE LIGHTS ON FLASHES TRUCK RUNS REALLY ROUGH

1998 Ford F-150 • 190,000 miles

Start when got bad gas was able to fix with plugs, wires, fuel filter, started running fine someone put bad gas in again. So started over new plugs changed coil packs dig. Code says #3 mis firing. Light stays on then starts flashing if u take it out of over drive to raise rpms it will run better not great. Runs really rough feels like mis fire r that its carboned up. Getting only about 11 mpg wasn't sure if put new fuel filter r if had censor going bad r what next step is
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Tony rothmeyer
June 24, 2013.




Try running some injector cleaner in the fuel to see if that helps.
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I have added it several times doesn't change it at all

Tiny
Tony rothmeyer
Jun 24, 2013.

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