1998 Cadillac SLS

Engine Mechanical problem
1998 Cadillac SLS V8 Two Wheel Drive Automatic 150000 miles

engine running rough, shaking in park and driving eating alot of gas
Frederick terry
November 27, 2009.

Frederick terry
Nov 27, 2009.
I would assume you have a check engine light as well. Press 'Info' up, and 'on/off' to enter diagnostics, use 'Info' to scroll alphabetically to PCM. Press 'on/off' and then use info to get 'PCM codes?' And press 'on/off'. Record and report code(s). It sounds like you may have an ignition misfire. Could be a plug, wire, coil, or related.

Nov 27, 2009.