Question about Cadillac Eldorado

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I have a 1990 cadillac eldorado when i am at a light it idles rough what is it

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Hello, This problem needs step by step diagnosis: The rough idle can be caused by several things: Spark plugs, Spark plug wires. Distributor rotor and cap. Bad fuel injectors (check Resistance of injectors (12 - 16 ohms, all injectors should be about the same). Vacuum leak, check this first. If nothing shows up, then do a compression check, all readings on the compression check should be about the same. Hope this helps you out

Posted on Sep 06, 2010

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