I just put in the copper plugs a few days ago, my father found out that those were the choice plugs for that car. But i have been having a lot of trouble lately with the car the #1 cylinder is not firing. We have done a ton of work on it and it looks right now like the head is coming off and new valve seats are going in. Any suggestions while i have the head off.

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Pete

1986 Euro Black Metallic 190E 2.3 16V