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Mystery plug and compression problems

741 views 1 reply 2 participants last post by  dejablue 
#1 ·
Hi guys,

Recently put my X back together after neglecting it for almost a year. Changed the valve cover gasket on driver's side, changed plugs and the gaskets on the plenum. Vehicle runs great for about 10 minutes then acts like it is having a compression problem. As far as I can tell, all the vacuum lines are back in the correct place. Also, there is a small black electrical connector that I can't figure out where it connects. I have attached pictures of the connector. Any insight would be appreciated.

Thanks.
 

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