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low compression and dull spark

659 views 3 replies 3 participants last post by  taytayee 
#1 ·
Recently rebuilt my z6. Come to find out the pistons I bought aren't what they were supposed to be. I couldn't get it to start and now I realize the spark is a dull orange and the pistons are 21mm tall compared to the stock 30mm. Which is giving me stupid low compression. My question is would super low compression cause dull spark? I need to know if I need to order a distributor as well as the RIGHT pistons.
 
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