My 1999 jimmy 4x4 4.3 l tries to accelerate on it's own
My Jimmy tries to accelerate if you are driving and try to stop for a light, etc,
the Jimmy will slow down eventually, but the engine revs up and if you
paying it take off on you. It also happens I'm changing from reverse to drive
or the opposite. Also on normal acceleration there doesn't seem to be much
power.