Engine Performance problem
1996 Toyota 4Runner 6 cyl Four Wheel Drive Automatic 329000 miles
My wife's 4RN idles very roughly. Once driving, it smoothes out. Lots of power once moving, even to spinning tires, from a 10kph roll. It almost sounds as if it is missing. Appears to have more power when I manually shift the AT, or when the O/D is off or the ECT power switch is utilized. Cleaned AF (K&N lifetime), both 02's changed, twice, as the shop stated 02 sensors were coding. Check engine light remains ON. VERY poor mileage. As well, the engine is VERY loud, as if the exhaust / muffler have a hole in them, but a visual inspection does not confirm this. We also have the bee buzzing noise after shutdown, especially in the hot summer, as is apparently common with this V6 engine. Have had timing belt changed at normal mileage, as per OEM recom. Am thinking it could be plugged fuel filter, plugged cat, plugs / wires /dist. Cap or rotor, or dirty MAF / coolant sensor? Any suggestions? Thanks in advance.
have the same problem?
Friday, April 11th, 2008 AT 7:51 PM