unless he has california emissions vehicle he only has 1 pre cat 02 sensor in his truck, i have posted a breakdown of the O2 sensor setups that came on these trucks and which systems came with them, it was in response to one of your posts

 

I will check the CAT tomorrow. I noticed I don't develop the misfire until it has been driven 2miles at full operating temp. I cleaned the TB till it was spotless today when I changed out the IAC. Haven't got to drive it yet with the cleaning and IAC cause my truck was blocked in the shop. $35 for a denso O2 sensor from Rockauto isn't to bad. I might as well order it cause mine is so old plus the oil.

 

Order both and be done with it. I'm with hydra on the plugs and cat, that much oil being burned could easily have blocked the cat up

 

Ok I just ordered an denso O2 sensor.

Since I really don't know what to look for in what color the CAT should be here is a pic:

Now I had just driven 10miles with a hard WOT acceleration just before the pic was taken. It was Idling when the picture was taken. The color is really close even though the pic is kinda blurry.

 

I don't think its plugged, would some one confirm. I'll update after the new O2 sensor goes in next week.

 

Looks normal to me, I'm sure replacing the rear o2 is the fix

 

ok i did the O2 sensor and put in a new hypertech coil. It seems a lot better now. I still have a miss fire. It sounds as if I have a plug wire shorting to the block by the click noise that accompanies the miss. It sounds as if it is on cylinder 1 or 3. I will be investigating today and tomorrow. I also have noticed that even with the 180 t-stat the engine will run 190-210 when the ambient temp gets above 70ish. So I'm gonna add an e-fan from my friends hyundai if I can get it mounted and stuff.

 

So I finally figured it out. I feel dumb now, I could hear a click like the spark wire was grounding out. So I wrapped it in electrical tape last weekend . Today it was hot out and driving home from work I had to put it to the floor to accelerate and the check engine light flashed for a second. So I figured I would solve this before I tuned it. Pulled the #1 spark plug and the top electrode that the wire clamps on was loose from when I pulled to replaced the wires. I twisted it back down tight and all is good so far. I check #3 too but it was good. Go ahead and flame cause at this point I deserve it for being so bone headed