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Spark plugs that are cracked or carbon tracking, bad injector

If that does not help check for a vacuum leak

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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If I am not mistaken...1,3 and 5 are all on the same bank.

You have replaced the coil pack, plugs and ignition coil.

You need to look for something COMMON to that bank..and "NOT" common to the other bank.

The only thing that comes to mind, off the top of my head...is intake gaskets.

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  • 4 weeks later...

ok i will pass that info on the the mechanic, i will post when i find out what happens. thanks so much.

Hello, I´m the CTS owner from Estonia and have the same problem - 2,4,6 cylinders misfire. I drove, accelerated a little on the road and after stop and starting eninge again, then computer in the service showed that 2,4 and 6 are misfiring. Did You get the solution for this problem???

Margus From Estonia

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