OK guys when I fire my truck up it seams to run a little rougher than it should. I pulled the spark plug out of the 6th cylinder and it was wet and it was dark, I was thinking oil, so I dried it off and and pulled the plug from the 7th cylinder and it was dry as a bone so I put the plug that was in 7th in the 6th cylinder and put the plug that was in the 6th and put it in the 7th cylinder. I ran it for a few minutes and it was still sounding rough so I pulled the wire off of the 6th cylinder and it made no difference in sound. Then I pulled the plug out of the 6th and it was wet again, this time it was fuel. I tested the spark plugs in the wire and put it up against the manifold and it had a yellow spark in the middle and blue towards the end, shouldn't it be blue all the way through? I noticed that the top of the dizzy was loose so while it ran I wiggled it around and it didn't make a difference.

These were the problems I was thinking about
1. Piston Rings
2. Distributor Cap
3. Spark Plugs
4. Spark Plug Wires
5. Ignition Coil


What do you think is going on?

BTW the drivers side, 5-6-7-8 cylinders, tail pipe is smoking. I'm not sure if it is oil or if it is raw fuel. It seams to have a blue-ish tint to it (fuel) but I'm not 100%.

 

Try swapping plug wires around and see if the problem moves to another cylinder. I don't mean swapping one end of each wire (which would screw up the firing order)....I mean completely switching wires from the bad cylinder to a good one.

Visually inspect the inside of the distributor cap and look for carbon tracking.

 

Do what Argess says and see if moving the plug wires around makes the condition move to a new cylinder.

If not, pull ALL the plugs and report back with cylinder # and what the plugs look like.

If one plug is wet with fuel, and the rest aren't, do a compression check and see what you have. You might have a completely misfiring cylinder due to lack of compression.

 

Ok if there is lack of compression is that compression rings?

 

Ok I did some plug and wire pulling to day and I ran and got a new plug to see if it was just the plug and it is still making weak spark so I shoved my finger inside the wire and it didn't seem like it gave me a good shock. So I'm thinking the coil is dead.