Chevy/GMC Small Trucks Forum Discuss the Colorado, Canyon, Sonoma, S-10, etc here!

Poor gas mileage . . . 2001 4wd 4.3 litre

Old Apr 30, 2009 | 02:54 AM
  #1  
cmangle's Avatar
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Default Poor gas mileage . . . 2001 4wd 4.3 litre

I am getting VERY poor gas milage in my Sonoma. the truck runs fine, no rough idling, no hesitant exceleration, no black smoke out of the exhaust.

Connected diagnostic comp to omb (sp) and no red flags appeared!

If I read my manual correct, I have a 18.5 gal tank and maybe I can get 200-210 mpg. That equates to 11.5 mpg.

Thats worse than a V8!

Any suggestions?

I've checked the obvious, leaks, tune up . . brake stuck on!! 8^)
 

Last edited by cmangle; Apr 30, 2009 at 03:39 AM.
Old Apr 30, 2009 | 05:10 AM
  #2  
GMCSierraFan's Avatar
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From: Midwest
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Maybe your CATS are clogged or damaged...?

I would just do the obvious tune up right now, brake adjustment, oil change, spark plugs, etc.
 
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