Adjusted Pump - Wow!

[JFitzgerald]

This past weekend, I got a chance to adjust my pump. BIG IMPROVEMENT! This is exactly what I hoped for, but in the back of my mind I didn't think it would improve that much. And I haven't switched the turbo housing yet.

I used the instructions from TST's web site. They made it simple. Access to the power and idle screws is the worst part. It appears that someone may have played with the smoke screw before, since the cap had a hole punched in it from prying it out. When I went 2 turns in, there was not enough thread left sticking out to put the lock nut on. Is it in too far now? I backed it off 1/2 turn later to experiment. The previous owner said the injectors were replaced at 60-some thousand miles, maybe they adjusted the smoke at that time?

My main question is this: Right after adjusting the pump, I took a test drive. There was a little bit more power at low end, but nothing after that, and just a light gray smoke at full throttle. I was disappointed and thinking I had one of the "very few" trucks with the injectors that won't flow more fuel, like the instructions mentioned. I took a 20 mile ride to a friends' place, was there maybe an hour, and when I left there, it started making a difference all the sudden. Pulls much harder through the gears, and smoke is heavy and black with heavy throttle. Been fine since. What could have caused that?? The only thing I can think of is I did not lube the eccentric thingy under the diaphram when I put it back in. Wasn't sure if I should, since it came out clean and dry. Maybe it was sticking? Should I put some oil or grease on it?

Now I not only like my truck, I love the new found Cummins power!