I've got a new issue.
I got the van back from the shop this afternoon and it runs fine at idle but stutters badly going up an incline or when trying to accelerate. The mechanic said it was the transmission going out. I'm pretty certain that is not correct. This is definitely a brand new issue after the tune up. They closed right after I picked it up so I have not discussed further with them
The following work was done:
-new plugs (properly gapped and torqued by me)
-new wires, rotor, and distributor cap
-The distributor was pulled and put back in (the shop put it back in).
-new front 02 sensor (just because-it was working fine)
-new heater core, coolant, hoses
I can only see three possibilities. Either I got the wrong 02 sensor, the timing isn't set right, or the computer needs to be reset. I tried disconnecting the battery (starting battery only) to reset but it didn't help.
I can try sticking the old 02 sensor back in and see if that helps.
Any advice before I take it back in would be appreciated.
Thanks again to everyone on the broken bolt problem: