Had kicked down cable replaced in my 1983 gmc k1500 4x4,have lots of rpm rev with some backfire and choking,but no increase in road speed with 4 barrels kicked in,any idea what the problem could be.
SOURCE: lacks power
check the mass airflow sensor. When bad, there is reduced power and the computer uses a default setting
SOURCE: Car droning noise
While you are driving, get up to roughly 40 MPH on a road with little or no traffic. Once at this speed, whip the steering wheel left and right as if you were making rapid lane changes. If you notice a change in the pitch or intensity of the sound, it is quite likely that you have a pending wheel bearing failure. The reason that the change will be noticed is because there is a rapid change in load placed on the bearings during lateral moves. Outside of the, the tires alone, can be quite noisy. I drive an old 1981 Mercedes 300TD wagon. I never realized how much road noise was coming from my tires until I replaced them with new ones!
SOURCE: Backfiring on acceleration of a 2002 GMC with 6.0 Engine
Backfires are usually caused by a lack of fuel...change the fuel filter. Also very old spark plugs (or plugs gapped to wide ) will cause this problem.
SOURCE: 2000 gmc sierra lack of power under acceleration
It is most likely just a dirty fuel filter.
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