Mechanics

BLAZER K1500 RUNNING RICH

1993 Chevrolet Trailblazer

My Blazer, 4WD 180K miles, is running rich judging by heavy soot on the tailpipes and MPG of 10-11. Could it be a bad O2 sensor? It has throttle body injection, catalyst status unknown(it has one still)

Any ideas?


http://www.2carpros.com/forum/automotive_pictures/73637_DSCF0017_1.jpg

Avatar
Bowse
May 12, 2007.




At that mileage could be the 02 sensor, coolant temperature sensor-leaking injectors

Won't hurt if you have the fuel pressure check

Tiny
Rasmataz
May 14, 2007.


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