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03 Mustang 3.8L chugging?
After I bought this car, I did a tune up ( coil pack,plugs, wires and air filter. Changed the trans oil and filter. It still "chugs" when crusing. Can't find the reason. HELP !
Sorry, spelled cruising wrong. Anyway, I did change the fuel fillter. You feel it chugging, its worse just before it downshifts out of overdrive, but I still feel it in 3rd too
2 Answers
- cobrajetLv 79 years agoFavorite Answer
Did it chug before the tune up? You may have installed a couple of wires wrong.
If it chugged even before the tune up then it might be the O2 sensors, a weak fuel pump, a weak ignition module, or any number of other things. You need to put a scanner on it to see what codes it's probably throwing off. Any large chain auto parts store will sell it and some will scan it for free..
