Whats wrong with my engine it misfires?

Hi Guys. I'm having slight trouble with my '94 3.0V6 Ranger, approx 60K miles. When the engine is cold, then truck runs fine but once the engine warms up, the truck misfires constantly. I've done serveral part replacements; new plugs, leads, cap and rotor, even the coil. My mechanic thinks it could be the distributor itself. Any ideas? By the way, this only started to happen when I replaced the plugs and wires. I checked and rechecked the wires and plugs. When my mechanic checked the wires and plugs he mentioned the misfire wasn't from any specific plug, more sporadic.
Thanks again, Phil

Thanks for the info. I replaced the EGR valve, I'll have a play with the truck this weekend.

Well, here's the answer to the fix. However, before I tell you, there's a leason to be learned. Never listen to your friends that say they're "car savvy". Always go with your gut instinct. My gut instinct kept telling me that the new spark plugs I had just put in were faulty. My mate kept telling me there's no chance that would happen. Well, the ceramic was cracked on one of the spark plugs which made the car buck like a bull when it was warm. ALWAYS CHECK YOUR PLUGS. EVEN IF THEY'RE NEW! Thanks for all the help.

94 Ford Ranger 2.3 stnd 2wd, runs fine when it first starts, gets down the road and begins to***** and backfire. If I start out slow and down shift before its time to, it will go, but if I give it too much gas at first it hesitates, ****** and backfires. It feels like its going to beat me to death. It loses power as I climb up a hill, if down shilt and floor it it starts to clear out the***** and backfire checked all fuel cdomponents, they rare ok. I was told it was an ignition problem. I charged spark plugs, dual coils, ignition position moduel. I even changed the 02sensor before the cat, cleaned the EGR, has good vaccum and I'm stumped. Do you have any suggestions of what I might check next. I'm stuck! Vicki

I replaced my alternator in Jan. When I unplugged and drove it unplugged it ran like nothing was wrong with it. Plug it back in and it****** and backfires like crazy. Still trying to figure out whats wrong?

I can't get the old throwout bearing off of the slave cylinder. I tried the methods in the book: Twisting it to put pressure against the spring, then pushing down on the spring to release it. Nothing works. I don't want to break the slave cylinder because I want to reuse it. How do I get the throwout bearing off?

I just replaced mine. I figured it out from your comments, thanks for giving me a clue.
I removed the slave cylinder so I could get a good look at it. I turned the bearing counter clockwise until it stopped. Then I pulled and twisted CCW sharply. It popped off.
I know this is late for you but maybe it will help the next guy.
Cheers

After a long dedicated 14 years, thhr ranger is beginning to act up. Have replaced fuel pump, fuel filter, spark plugs wires etc. But the engine seems to be missing firing on a cylinder when idling. When under power, it seems that the truck is going to buckle over and shudders very badly. The fuel pressure is good @45psi. The transmission has about 160000 on it. It was running ok till I decided to do some PM on it and has never been like before. Every mechanic has pointed in every different direction. The truck passed emissions with flying colors two weeks ago when the problem was intermittent. Now it is continuous. Compression in cylinder 3 is 75psi(as per the repair shop). What should I do next and what is the problem?
Thanks for your help.

Will be doing a wet test in a couple of days, but everybody wants me to swap the engine out, which I am very hesitant to do. Want to rebuild the head and the valves if that sounds like it will solve the problem. If the pressure comes up with the wet test then only I will swap the engine.(Indicating bad rings). We will know pretty soon.

Thanks blackop555 :-))
We will know better tomorrow after the wet test. I think that will decide if I need to swap the engine of work the valves and the heads. I really do appreciate your input. Let us wait and seee.

My Ranger is not firing on cylinders 1 and 4 on the rear coil pack and has a rough idle w/check engine light. Pulled the code as multiple misfire. I replaced the coil but it had no affect. I verified no spark on 1 and 4 by simply using a timing light and checking all 8 plug wires on both packs. Yes 8, as it has 2 plugs per cylinder. I also pulled the plug wires off the coil with no arc on said cylinders. I want to know where I should be looking to solve this issue. ECU, sensor? Thank you.