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Rough Idle and performance

keleko17

Active Member
Joined
June 16, 2009
Messages
83
Reaction score
1
City, State
Louisville, KY
Year, Model & Trim Level
2007 EB and 1999 XLT
My 1999 4.0L OHV is struggling. It has 198,000 miles. I am trying to see if I did something to cause it, or maybe it is bad karma. It started after I got an oil change. While at getting the oil change, I had them do the engine cleaner junk, and an engine treatment.

The next day, the car is bucking, and rough idle, and such. It could be just bad timing.

About a year ago, I had the fuel pump replaced, and the fuel filter. About the same time, I replace the spark plugs, wires, and coil pack.

Any idea where to start? I just finished replacing the upper control arms, lower ball joints, front and rear shocks, the outer tie rod ends, and of course an alignment. I hoped this work would get me through to next spring.

I could really use some guidance.
 






I also had the intake gasket replaced...
 






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