Engine misfiring or running rough

[Tredog500r]

So I drove to my buddy's the other day and the old girl ran great as usual. When I got in her to leave, the old girl just ran roughl like she was misfiring. I limped her on home and after new plugs, testing the year old wires and new fuel filter, I am running out of options. I can't really afford to take her into a mechanic. She's a '93 ranger xlt supercab 4x4. I also did put in a new PCV valve. Ran the KOEO and KOEO codes all coming back 111 which is normal. I also do NOT have an EGR on this truck. It runs smooth at idle then from about 1000 to 1500 runs rough. Past that she runs ok. It's the worst when under load. Any help would be GREATLY appreciated!

 

[Spott]

Which engine?

Are there any exhaust leaks between the engine and the O2 sensor (at the cat)?

 

[Tredog500r]

She's got the 4.0 in her Spott. I have not checked yet. Thanks. I did some off-roading a couple weeks ago. Coulda broke something loose.

 

[Tredog500r]

No exhaust leaks as far as I can tell.

 

[Tredog500r]

Update

Took the old girl into a local mechanic to diagnose and I have a dead injector on #2 cylinder. I am ordering a full set. Gonna undertake the job myself as I can't afford the shop labor.

 

[black_demon69]

Took the old girl into a local mechanic to diagnose and I have a dead injector on #2 cylinder. I am ordering a full set. Gonna undertake the job myself as I can't afford the shop labor.

injector was what i was thinking before i read this post. might also do intake gaskets as well because you are 1/2 way there.