1993 Blazer K1500 running rich

1993 CHEVROLET TRAILBLAZER
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BOWSE
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  • 1 POST
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?[img:6f1b359d88]http://www.2carpros.com/forum/automotive_pictures/73637_DSCF0017_1.jpg[/img:6f1b359d88]
May 12, 2007 at 2:53 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
At that mileage could be the 02 sensor,coolant temperature sensor-leaking injectors Won't hurt if you have the fuel pressure check
May 13, 2007 at 8:25 PM
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