i have a 1995 s10 with a 4.3 vortec tbi that badly shakes at idle.
i recently replaced spark plugs and wires, cap and rotor
the truck drives runs fine. the miss goes away soon as it revs at all, and it doesnt miss when its driving. the truck is also running rich, and it doesnt get the mileage it should. about 11mpg highway.
i have recently checked the MAP sensor, and the truck has 145k miles in it.