Misfire? Running rough around 50 mph and 12 to 1500 rpm?
#1
Misfire? Running rough around 50 mph and 12 to 1500 rpm?
My 2001, 150000 miles, Sub just started running a bit rough, possibly a misfire, but not sure? Around 45 to 50 mph, 1200 to 1500 rpm, most pronounced going uphill, engine seems to skip, run rough, misfire?, If i downshift it doesn't seem to do it? Normal idle and low speed, smooth running. There isn't any check engine light on. I thought about plugs and new wires, but some of the stuff I have read here doesn't really back that up as a solution. Possibly and O2 sensor although I thought I would get a check engine light for something.
Does anyone have any thoughts or recommendations before spending a $1000 with mechanic checking things of the list. Thanks in advance for any help!!
Does anyone have any thoughts or recommendations before spending a $1000 with mechanic checking things of the list. Thanks in advance for any help!!
#3
Administrator
2001, 150K miles I'd start with a good clean tune up...run a few bottles of injector cleaner, check the fuel pressure... clean up the MAF sensor...
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