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High and rough idle 87 MJ

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Bought an 87 MJ with a 2.5 and 4 speed. Love this thing, but have a high and rough idle. Replaced vacuum lines one by one till I came across a solenoid of some sort laying on the pass side wheel well with both hoses disconnected.



No idea what the unit is or where the lines go, and seem to have a possible issue with the throttle body having what appears to be 2 missing vacuum ports. Any tips on these issues?


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