Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › Engine problem › Reply To: Engine problem April 24, 2021 at 4:12 pm #990251 Robby BrownParticipant I’m no technician by any means, but I’d say if they’re seeing compression loss of some sort, then a leak down test would help pinpoint where the lost compression is going. Eric did a really informative vid in the link below.