Picked up the rig a few weeks ago and it's had a hesitation under full throttle starting around 2500 rpms or so. The vacuum advance was not hooked up correctly (delay valve was backwards) and it needed a stepper motor so I fixed those things. Since then, the idle has been ok most of the time, but has dropped occasionally to around 150-200 rpms with a rough idle. I changed the vacuum advance today and it helped for a little bit but was back to it's old habits again.
I pulled the TPS of and hooked it up to my multimeter and recorded the results. Now, I'm guessing by the jump that I need a new TPS, but what do you guys think?