Misfire in '05 Ranger

[mctavish]

My 2008 3L Ranger had a #4 misfire. Replaced coil, plugs, wires and still had it. Injector 4 sounded ok. I took off the upper intake , replaced the 3 gaskets and the #4 injector. Was ok after that.( I did find some oil in the upper intake and also noticed the bolts were not really tight.)

 

[d_man1]

One more thing I forgot to mention earlier. This truck does not like to idle too long. If I'm in very slow traffic or stopped at an intersection for a few minutes the "check engine" light goes from constantly being on to flashing. When that light starts flashing the idle gets very erratic and the engine wants to stall. I thought this was only happening in hot weather at first but happens in cooler weather as well.
Is this happening because it's running on 5 cylinders?

EXACTLY what was going on with mine. Take it to a mechanic ASAP or pull the heads. you for sure have recessed valve seats. seriously. Um sure over half the 3.slows on this forums have the problem that goes overlooked.

 

[6herald6]

... so, it turned out to be the worse-case scenario; two new heads were needed.
Now, it looks like there might be a problem with the catalytic converter.
One problem begets another, it seems.

 

[sethsbseries]

Herald how many miles are on the 05