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Im fighting a damn problem with my car that has me baffled to this point. On the way home from a cruise the other night it started missing and acting like it was loading up. Started to clear up and ran ok for a bit, got home and it didn't want to idle. Parked it until morning and started it and it was missing like crazy.
Long story short i pulled the plugs and they looked a little fouled but not soaked or anything. I changed them anyway and with new plugs it was still missing. Badly like timing was off.
Pulled cap and checked distributor and timing etc...it all checked out fine. So I ran data log on the FI system and found some weird shit.
AIC Fuel trim is running -33% so its cutting fuel like crazy and the AFR is running 10:1 to 11:1 with the set point at 14.5:1. But it doesn't smell fat at all.
I wonder if the O2 sensor is bad and reading low so its cutting fuel causing the missing?
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