96 ranger 2.3L P0300 code help!

[wsr02]

so i just recently put a fresh head on my 96 2.3L ranger last month.
after buttoning the head and new timing belt etc up, it started right up, and seemed to idle a little high for a minute or two but then leveled off. i replaced all the gaskets and checked all the hoses. it ran pretty good for a couple of weeks, then my check engine light came on and it started to stutter and sputter sometimes, then idle really high at other times. i checked the code and it only comes up with a P0300 code, and when i clear it, the code just pops again almost instantly. when the head went on i put in new plugs and wires, and after this happened i pulled the pcv and cleaned it and the code instantly disappeared and ran pretty good. then a few days later the code came back with the same engine characteristics. so i went ahead and replaced the pcv all together, but this time nothing happened and it continues to run rough..

please help! any advice or suggestions would be much appreciated, i need to get this thing to smog by the end of june!

 

[zonianbrat]

Without knowing what the P0300 code actually is, have you checked all vacum hoses? Just a thought.

 

[wsr02]

the P0300 is a "Random/Multiple Cylinder Misfire Detected"

whats next, replace the O2 sensors? ignition coils? EGR valve and PFE/DPFE sensor?

 

[wsr02]

just so anyone else out there is wondering, i ended up replacing the O2 sensors and then the pfe/dpfe sensor which made the check engine light go out, but it still ran pretty rough. so then i actually replaced the TPS and cleaned out the throttle body really well and it immediately started running better and has totally smoothed out..

just fyi

 

[Tbars4]

...Thanks for the update...

...This is the first I had seen of this thread...