Note On Intermittents
WARNING: This page is about a different car, the 1990 Cadillac Seville and 1990 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
Manipulate ISC wiring while observing ECM input EI72 and while observing ISC operation during ECM output EO07. Manipulate TPS wiring and connector while observing ECM parameter ED01 for jumps, skips, and/or intermittent behavior. Check for TPS secured to throttle body (both screws tight). Cycle TPS through its full travel while observing parameter ED01 for erratic behavior. Check for proper part number TPS installed on vehicle. Unplug and plug the TPS, ISC and ECM connectors and ensure that they are latched properly.