Frank DuVal Posted May 25, 2021 Share Posted May 25, 2021 22 hours ago, Florian said: - did the compression test, all cylinders around 130 PSI when engine is cold, except cylinder 7 which was zero - endoscoped the cylinder and found a stuck open intake valve, which is bent and touches the piston (shiny mark on piston and valve) - took of valve cover, rocker arm is not under tension when valve should be closed The zero compression in #7 can explain the not idling. It is causing a vacuum leak therefore lean condition to the working cylinders. Link to comment Share on other sites More sharing options...
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