My 2011 Silverado 4.8 V8 liked to rev up a few hundred rpms when I would inch it along or be moving in and out of N like when trying to get lined up on a trailer. Problem was dirt had accumulated around the air intake butterfly that the computer controls in determining engine speed for a given set of circumstances. Seems small dust particles....apparently getting through the air filter, and EGR engine oil vapor for a "binder" accumulating on the sealing surface of the butterfly made the engine run lean so the computer adjusted the fuel flow to keep it at 12% or whatever the design number.
Cleaning around the baffle and where it seals against the air plenum stopped the problem.....alcohol on a long, wooden stem, Q-tip type cotton swab and my finger....to hold the baffle open did the trick.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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