cylinder misfire

[silverclaw328]

frequent reader, this is my first time post though. i own a 1994 ranger 4x4 xlt, with the 4.0 liter OHV motor. im getting a misfire in the #4 cylinder, and yet im not throwing a check engine light or getting any codes. i've replaced coil pack, wires, and plugs and it's still misfiring, obviously not electrical so it must be mechanical. what could be causing this misfire?

 

[BRUTUS_T_HOG]

how do you know its cyl#4? you have a p0304 code?

don't forget it could be fuel related.

 

[AngryLepercon]

Kinda late here but check for a head gasket. I had the same issue. Only I had a misfire in Cyl 3 & 6 turned out that a head gasket was bad and it was dumping coolant into both of the cylinders. Overheated once and noticed the coolant being empty. Long story short $1400 later with 2 new heads (both cracked when it overheated), gaskets, bolts, fluids its back to normal.

 

[lostcos]

same deal here, had head gasket blow and cracked driver side head between valves... trucks had 4 motors in it, and now locked up rear diff!!! never did find out y the first 1 went.........