I picked my 89gt up sunday and found out that the TPS is unplugged. Let me start off that it had a surging idle it would go from almost dying to 1000rpm and sometimes it would die. I pulled the intake apart, cleaned the MAF and found the TB to be very dirty, cleaned that, and plugged the TPS in and took it for a drive. Ran excellent until I got in it the next day. Ran good until 5 min of running and the idle shoots to 2000rpm and stays there. I Pulled over and disconnected the TPS and the idle is perfect. Now, I was thinking mayb the computer needs to be reset because it has parameters set from running without a TPS signal for so long, and then plugging it back in confused the ecm... does this sound feasible? I haven't tried yet, but I plan on doing the idle re-learn procedure in the near future. TPS voltage at idle is .65, What do you think?