[RyanAK]

Thanks, guys. I’m not very familiar with carb internals. Everything on the outside... linkage, pull offs, idle mixture, high idle cam, choke... I’m good. The inside is still a mystery. I’m hoping this isn’t carb related. It’s functioned perfectly this past year in all weather and there’s only about 18,000 miles since it was rebuilt. Whoever put this crate motor in seems to have done an excellent job on everything else.... but maybe he isn’t a Quadrajet man. Any guidance, I’m all ears.

Nick, I’ll definitely have a look at the rod and cam. If I remember from the last time I did a fuel pump like this 30 years ago with my Pap, the rod is gonna fall in my lap when I take the pump off. Good suggestion.

Jay, I’ve listened and sprayed carb cleaner in all the suspected spots for a vacuum leak. Even around the hoses for the cruise module that isn’t there any more. Hoses all seem pretty new. Gauge on the passenger side vac port is dead steady at 20” at 700 rpm. I’m open to any suggestions or help in chasing a vac leak. Up until this very moment I felt pretty confident that everything was right in the vacuum department.

Also... I bogged again. This time I stopped at a convenience store, left the truck running while I ran in for a Coke, and then pulled out and normally accelerated to about 45. Lost power for maybe two seconds, then it caught itself and off we went. No hill, completely flat. Did not accelerate aggressively. Just moseying along. Didn’t happen the rest of the day.

Of note, and possibly related... today and the day I ended up on the side of the interstate have been exceptionally hot. Not sure if that could make symptoms appear or not...