I have a 1990 4X4, 1 ton, 454 chevy. It gets 8.8 mpg with no load - most of those are country miles. I try to drive with a light touch. Shouldn't I be getting closer to 12 mpg? The engine seems to run smoothly except when the EGR valve sticks and I have to unstick it. I had a mechanic check it out tuneup-wise before I new the gas mileage and he said it was fine.
Where do I start checking? Can someone give a list of what to check?
Thanks! Dan H
Also posted to alt.autos.4x4.chevy-trucks
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