Just put motor back in after a rebuild I ran it with breakin oil for 20 mins twice up to 190 degrees. Ran perfect at 1100 rpms changed the oil and now it is running at warp idel speed . of like 2600 rpm do I have a vaccum leak under load it ran fine just a killer droping it in to gear at that rpm any help please. and how do i check for vaccum leak
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