How to Adjust your Early C4 TPS and Idle Speed by Lars Grimsrud SVE Automotive Restoration Musclecar, Collector & Exotic Auto Repair & Restoration Broomfield, CO Rev. New 6-15-00 This tech paper will discuss the procedure for correct adjustment of the Minimum Idle Speed and for adjustment of the Throttle Position Switch (TPS) on the […]

I have an automatic, 93 LT-1 that I autocross. The course that I was running was low speed and I could run in \”L\” range and stay off the rev-limiter. While staging in my next to last run, I found that the automatic transmission was not shifting until 3500 rpm, unless I would take my […]