After trying many different things such as checking vac lines, isc, etc. to see if any would affect my rough idle problems, i tried unplugging the tps because i hear that it can sometimes cause rough idle. My observations prior to unplugging to tps were: vac at 16-17, fairly smooth idle at around 650 but sometimes lowers to 450-550 (and vac lower at about anywhere from 10-16, with any combination of being steady or surging with rpms) where the idle surges for a long bit until it manages to bring itself back up to about 650. Observations after unplugging tps: vac of 18-19, a bit higher idle at around 700-800 but never lowered below 650 (seemed to be running better... weird?), still a slight surging could be heard but im not too worried about it (very faint). So what is up with that? is that a common symptom of a dead tps? With the tps plugged in, if idling and i do a quick rev up to anywhere from 2500-3500 rpm, the rpms will then drop to the stage of 450-550 rpm surging, but if in this state and i slowly bring the rpm up to 1000, the surging stops and the idle returns back to around 650. This sequence of events does not carry over to when the tps is unplugged because, like i said, the rpms do not do the low idle surge. After driving with the tps plugged in i noticed that when i stopped to idle the rpm was higher around the 900-1000 range. I tried testing the tps with an ohm meter like in the tsrm but i was getting no results so i may throw that out because of the cheap meter. Any ideas guys?