2000 silverado pickup 4x4 4.3 runs and starts very good.but but trying to stay at a steady speed it wants to miss and jump or buck give it more gas and its ok

SOURCE: dodge 318 2500 ram wagon stumbles on medium acceleration .

Have to plugs and wires been replaced according to the manual every 30/60K? Check for play in the distributor. Look in the throttle body with a light for oil on the intake floor, this would be a bad lower intake gasket. Make sure to use the factory recommended spark plugs, it only likes Champions.

SOURCE: Hit the gas and get a bucking, bucking and more bucking.

There's alot that can cause this problem. Check battery cables and clean. Drive to autoparts place for free diagnostic. It could be a throttle position sensor, EGR valve, bad gas, bad coil, bad plug wires. Just to name a few. Hopefully the diagnostic test will pinpoint it.

SOURCE: 2000 silverado will start but wont stay running just dies.

I also agree it sounds like a fuel pump issue. Its easiest to remove the box (6 bolts {need impact wrench} disconnect wires at plugs and disconnect gas filler hose) and lift box up. A hoist is easiest but 6 people can lift it easily. The fuel pump can easily then be replaced. Takes about 1 1/2 hrs. to do entire job this way and its so much easier!
Good Luck!

SOURCE: Transmission Bucks on hills

I have a 1990 Buick LeSabre with the 3800 engine. Recently the engine has began to miss under mild acceleration. It is not just a misfire where the spark plug failed; it is more abrupt.

when the engine idles it almost always acts like it the engine is misfiring and it is like the engine is actually kicking back every nowand then. From inside the car while idling, I can feel the same phenomenon. I kicks!

I am not sure where all of the notorious sensors are located and I not feeling like they are at fault. The only one that I feel could be the culprit is TDC sensor or and anti knock device if it has one. Of course it could be the ignition module, I guess.

What I am thinking is that if this engine had an old fashion distributor, it would be as though a cylinder ignited out of sequence or before the piston reached the point that is near TDC. Could it be probable that the the module allowed the spark to set off another cylinder sporadically? Does this motor have an actual distributor cap? Could there be a short between some terminals?

It is not valves because for short periods of time the "miss" will vanish.

The check engine light is not on!

SOURCE: 2000 silverado 4.3 5 speed truck bucks at part

sounds like it is in the throttle sensor or idle control valve causing problem not responding fast enough to take over also try the fuel filter could be clogged.