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1991 Cadillac Deville CO failure, Need Help.
Posted to Emissions Forum on 11/12/2002 28 Replies

Hi EmF,

I'm looking for some direction or advice on this 1991 Cadillac PFI 4.9L CO failure.

At 15mph CO measures 0.98% while 0.70% is allowed.

At 25mph CO measures 1.00% while 0.57% is allowed.

I hooked up the scanner and BLM was at 108. I looked for s... Login to read more.

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