reving unnormal...distributor or oil?

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playboyace35

Junior Member
i have just a tiny little bit oil in the sparkplug tubes or that cylinder part..just a tiny....whenever i drive it...my rev be jumping up and down....sometimes when i am just crusing at the same pressure on the gas...the rev jumps up to 5000 when its only 2.... and when i press a little harder..the rev jumps up to 7,000 and my engine shuts down....is it my distributor or oil in that area....also my check engine light is on because i dont have my o2 sensor plug in because i am running off of a gsr header and just a cat...i have ls, but im using a dc sports gsr header....
what is my problem guys? should i take this to the shop or what?
 
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