Truck drives horrible.

[SkullnBones]

After today my truck idled and drove like absolute crap. I had recently put new gaskets on the water pump and it seals just fine, not leaking anywhere, temperature is fine. Before hand I never over heated it or anything. It holds good oil pressure and temperature is around 200. I heard because the headers and exhaust is cherry red it could be running extremely rich. I personally thought that the catalytic converters could be clogged and is not exhausting enough. I replaced 02 sensors and replaced the CPS (Crankshaft position sensor). I read the codes before all this happened and the MAP sensor did not come up. Any feedback would be nice. I know its hard to troubleshoot when its not in person but any feedback will help.

[Squirrely]

Need more details to the problem if possible

[SkullnBones]

Pretty much all it does. It starts hard, does not want to idle (does for a little bit but not long), drives like its having a horrible misfire, also the headers and exhaust run cherry hot. I am banking on the cap being cracked on the distributor.

[Squirrely]

sounds like timing, or the cap as you say.

[SkullnBones]

Yea that's what it was. Cap was worn out. It backfires now but attempting to change spark plugs because they were dowsed in gas. Could be injection or I burnt a valve. Hoping just plugs. But I will find out.

[SkullnBones]

Backfiring from carb.