1990 Cadillac DeVille 4.5L Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy

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Posted to GM Driveability on 1/16/2009 17 Replies

Here is the story.

Was running real rough and we changed the plugs thinking they were fouled but found that they were soaked with gas. We then plugged into the computer and found that the MAT was at -36 degrees and the CTS was at -34 degrees. After a few chec...

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Vehicle Data

1990 Cadillac DeVille

VIN	1G6CD1333L
Engine	4.5 L / 8 cyl / GAS
Trans	4-speed Automatic
Delivery	FI / pfi
Emissions	Fed Emissions
Symptoms	Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy
Occurs	Always

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Vehicle Data

1990 Cadillac DeVille

VIN	1G6CD1333L
Engine	4.5 L / 8 cyl / GAS
Trans	4-speed Automatic
Delivery	FI / pfi
Emissions	Fed Emissions
Symptoms	Excessive Emissions, Poor Idle Quality, Hesitation, Misfire, Poor Fuel Economy
Occurs	Always

17 Replies Received (View Replies)

17 Replies Received (Hide Replies)

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Vehicle Data

1990 Cadillac DeVille

Vehicle Data

1990 Cadillac DeVille