took jeep to dealer back fires on deacceleration slightly not very noticable dealer did tune up cleaned fuel system still does this also they can't get my valve cover to stop leaking any ideas thanks 95 4.0 95,000 miles
Replace the AIS or the o2 snesor. Is it burning alot of fuel? You may also have a problem with backpressure, cat maybe gone, or muffler burnt out. Too big exhaust diameter.etc...etc..
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1990 4 Runner...tall, tippy, and purple.
1987 XJ ...shorter, stable, and Green
"going around is NOT an option!"
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