Note On Intermittents

WARNING: This page is about a different car, the 1992 Cadillac Seville and 1992 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

Ensure ISC plunger is depressed when throttle linkage contacts stop screw. Check ISC jumper connectors and PCM connector for loose or improperly crimped terminals.

Fig 1: PCM Code E027, Schematic, Open Throttle Switch Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 2: PCM Code E027, Flow Chart, Open Throttle Switch Circuit

Courtesy of GENERAL MOTORS CORP.

Fig 3: PCM Code E027