B16, B18, B20
By slowredbubble
#343158 Can anyone give me am idea on this problem. The motor has good compression and drives, but there are misfires in cylinders 3&4. Any ideas? Distributor?
By bks84
#343186 Ive had three LS' come into my shop recently that the owner or previous owner installed a valve cover set incorrectly, allowing oil to leak into the spark plug holes and cause a misfire.

Check to make sure the plugs and plug wires are dry.