I am on a quest to help the groundskeeper at my school (UC Riverside) fix his 1988 Chevy C1500 5.7 liter V8 w/ a manual transmission. Truck starts up fine. During the first ten minutes when you step on the accelerator, the idle surges as expected, but then it takes a while for it to settle back down before you can hear a normal idle speed. What should I be looking at? I jumped the computer with a paper clip and no codes flashed. The shift light for the transmission lit up, but according to the owner, he has had no transmission issues. Any help or direction is much appreciated.