1993 f150, 5.0, automatic, 2wd, 170000 miles. engine light came on last week and started running real rough when first started after cooling down. then would run sluggish when warm. so i replaced oxygen sensor, map sensor, any help appreciated,,,, firstname.lastname@example.org
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Well...my ball park guess on this is just a tune up. The engine light is usually showing a misfire. If the plugs are bad then the cylinder is not igniting the fuel and it is flooding out. With what is here this makes sense to me. Let me know what it does turn out to be.
Yeah, cold weather like that makes the oil too thick to move. You need to install a block heater. The kind I like to use are a little heat pump that connects to one of your radiator hoses. When you plug it in it will circulate coolant, warm it through the engine and solve all your problems. A don't buy a cheap one. A good one is worth its weight in gold. A good one will cost you at least 75 to 100 bucks, with some as much as 150. They are real easy to install.
PO300 mu;ti cyclinder misfire can be many things Low fuel pressure or clogged fuel filter. Worn sparkplugs, need of major tuneup. If the car doesn't run bad conpared to last week when it did'nt have the missfire it may have missed just long enough to set the code. Engine starting cold and the valves and other engine parts not warming up fast enough not to stumble. The oil change being overdue can make this happen.. If it seems to run as good as anyways and basic maintanice is up to date reset the computer ( clear codes). Drive the car and try to see when and if the light comes on. Running real low on fuel, and running real short rips can cause fuel build up in the oil that can make it stumble as the engine oil does come to operating temperture.