98 bazer 4.3 of coarse 4x4 when you first start the car it skips really bad but clears up for the most part after heating up. there is a small leak in intake manifold gasket. I am getting three codes p0300, p0452, p0453 any hep you can provide will be greatly appreciated. I just replaced the injectors thinking that would cure the misfire code.

 

When was the last time you replaced spark plugs, plug wires, distributor cap and rotor? A random misfire (P0300) is alot of times cured by a simple tune up. Then again, alot of times it is much more serious than that...but always start small

 

im afraid this is the big one when I upgraded to new spider i replaced wires plugs and rotor just incase even though they all looked good