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1992 cadillac: 4.9 liter..check engine light..engine light comes…

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1992 cadillac 4.9 liter doesn't...
1992 cadillac 4.9 liter doesn't idle at times shuts off when started again won't idle sometimes check engine light comes on not all the time.
Submitted: 8 years ago.Category: Cadillac
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Answered in 13 hours by:
6/10/2010
Cadillac Mechanic: Jerry Newton, Cadillac Technician replied 8 years ago
Jerry Newton
Jerry Newton, Cadillac Technician
Category: Cadillac
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified
THE most critical thing to repair on this engine, before you do anything else:


The ground cable that goes to the front of the engine shouldn't be attached to the mount bracket (where the factory put it). It needs to be relocated to the engine block, right next to the starter. This is the only engine ground, and I can't overemphasize how important this is to making the engine run correctly. When you check it, make sure it's spotlessly clean. I use sandpaper on the contact areas of the cable and the block.

Most of these phantom driveability issues go away after repairing this ground.
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Jerry Newton
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Category: Cadillac
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