fuel mileage prolbems

2002 CHEVROLET BLAZER
157,883 MILES • 6 CYL • 4WD • AUTOMATIC
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MARK HINRICHS
  • MEMBER
  • 1 POST
2002 blazer 4x4 gas mileage went from 24 mph to 16mph what could it be? The fuel tank pressure canaster is bad but was told that wouldn't affect my mpg...
Dec 15, 2010 at 9:27 AM
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ERNEST CLARK
  • ✓Experienced Mechanic
  • 1,730 POSTS
No such thing as "Fuel Tank Pressure Canister". What you refer to is an emissions devise (Vapor canister). When was your last tune-up? If it's been a long time, start with that.

Dec 26, 2010 at 2:47 AM
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MIKE H R
  • MEMBER
  • 3,094 POSTS
You can try some throttle body cleaner. Sometimes a air hole inside the throttle body will get clogged with carbon causing reduced gas milage. Throttle body cleaner will help clean the carbon off.
Mar 8, 2011 at 8:56 AM
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