Oh,
On The Plus Side, The UIM cleaning definitely gave the car an added boost, feels like the power band and secondaries are opening twice as much!
To do it, i didn't pour in the liquid as suggested in How-To. I removed each of the UIM lines (one for brake vacuum, other for multiple vac lines?), one at a time, and used a throttle body spray cleaner. I did this with the engine off because the engine dies out too easily with a line open. Basically, I sprayed in a good dose of throttle cleaner, soaking the intake, started up, kept the rpms up a bit to pull it thru, then repeated this a few times. After holding the rpms for a while after 3 cycles of this, i definitely noticed increased and quicker response at higher rpms. Those secondaries are breathing easier now, and i was always happy with them before!!! Can't wait til i get this hesitation fixed now, should be purring and jumping quicker than it has in a while, and I have always been happy with the power and responsiveness of those secondaries..
I highly recommend doing at least the easy version of the UIM how to cleaning if you haven't yet. I regularly change the fuel/air filters and add gas treatment, but after 97K, the upper intake and secondaries must have been a little gunked up...
