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Old 02-03-2009, 07:21 AM   #9 (permalink)
RCHAD
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Join Date: Jul 2007
Location: RIVERTON UTAH
Posts: 167
keep in mind that at idle, with a larger exhaust, the flow of exhaust gasses is moving slower than it would with smaller pipework. it sounds like you may have a problem...it has been my experience with forced induction cars that if your plugs and o2 sensor are good, then look for plumbing leaks on intake side after the maf or exhaust leaks upstream of the sensor...what mods are on the car and what are the fuel trims at a cruise?

btw, imo, bosch anything is not a good choice for japanese engines!
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