Mechanics

ENGINE

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
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Frederick terry
November 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.
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Factoryjack
Nov 27, 2009.

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