Cadillac Repair: engine repair, chasing ghosts, cadillac dts

Question
i just change plugs on a 2000 cadillac dts 32 valve northstar engine1now the engine is still running ruff and the service engine soon lite is flashing.what would cause that

Answer
Hello,

The check engine light flashing is only a symptom telling you something is wrong with the computer and or components involving the emission system.

There are far too many problems that can cause the light to flash.

You can go to a parts store and purchase a code reader or you can take the vehicle to a service garage (not a dealership) and have the vehicle scanned for error codes. The codes will tell you what is malfunctioning in the system and then will tell you what part(s) failed.

If you try to guess what is wrong, it's chasing ghosts. The light illuminates leaving a code or codes telling you what circuit is not functioning.

The car will run rough with the light on and a tune up will not fix the problem.

Good Luck!

Rob