I ran the truck again this morning with #20 fuse pulled - just to double check myself. REALLY ran it - up the highway. Definitely a "pull" - again it happens as I start to relax off the pedal after accelerating. It's consistent - I can let the truck decel, then bring it back up to speed and pretty much every time I get the "pull". That's in 3rd with #20 fuse pulled.
Afterwards, I pulled the coolant temp sensor plug again and drove up and down the highway a few times. Nothing. No sign of any hesitation, pull, bucking, NOTHING. Pulling that sensor plug is the ONLY way I can get the problem to go into hiding.
Here's another thing - you may all be starting to think I'm loopy. A while back I posted about a metallic "thunk" on taking off from a stop. Lester, you had ideas it was coming from the TQ lockup shaft if I remember right. That noise has gotten worse, especially once the truck is warm. Here's the thing - tonight as I was leaving work I stopped at the intersection. While waiting to pull out, the truck made a "bang", just like the noise I hear when taking off - the rpm's changed and the truck tried to "lurch" forward. It couldn't obviously because I had my foot on the brake. WTF!!!
I've said this before, but I'm at the end with this truck. I've owned probably 2 dozen vehicles in my 32 years of driving and I've never had one with so many quirky, unresolvable issues as this one.
In answer to your question about parts - I've replaced the TPS, coolant temp sensor, checked and cleaned MAF sensor, egr. The truck has a new distributor. I have pulled and inspected the plugs and wires - I'm hesitant to throw more good $$ after bad, but I may replace them even though they all seem fine.
I just don't know where to go with this truck at this point. I can't bring it to someone and go after this with an open wallet - I already have far more into the truck than it will ever be worth, and in the process of trying to figure the current problem out I've come up with a laundry list of other things that could certainly use attention.
