Miss

[oldblue]

1994 4.0 ranger.
Its got a light miss at an idle that gets harder with increased speed and it seems to lag just a little in acceleration. I've replaced plugs, wires, fuel filter and pump. It has spark and is getting gas. The only odd thing is that the drivers side plugs seem to foul while the passenger side does not. I cannot seem to find a solution that fits any of this. Help please, i just wanna get this thing fixed so i can sell it.

 

[AngryLepercon]

Are the plugs gapped correctly?


Hows the fluid levels..... mainly coolant?


Check for vacuum leaks?


Clean mass air flow?


Air filter?

 

[hoosier1104]

Did you check the coil pack?

 

[PanamaExpat]

Have you run a compression test?

 

[oldblue]

Fluids are good. Plugs are gapped. New air filter. Replaced coil pack but still misses. Haven't run a compression test