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-LTFT & White Spark Plugs...bad O2?
working on a 1999 Chev Lumina 3.1L
Has a surging idle in closed loop.
Doesn't surge in open loop or while driving.
Used carb cleaner method to check for vacuum leaks and didn't find any
LTFT is close to -10 (rich)
Spark plugs are white (lean)
If the O2 sensor is indicating rich but the spark plugs say lean, do you think the O2 sensor is bad? ...O2 sensor has switching output voltage
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2000 Chevrolet Corvette Fixed Hardtop, 539 rwhp
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2000 Chrysler Sebring LXi
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