Re: Bad news from my compression test I think....how can car STILL refuse to start?

Posted by Jim L. in OR On 2012/9/8 18:46:27

Bad gas was the culprit in the Lincoln. It started running rough towards the end of the test drive. When we shut it off the gas/varnish congeald and cooled and dried. Result - stuck valves. Your backfire is to me another pointer to stuck valves. An intake valve sticks open, spark plug sets off the fuel/air and takes the course of least resistence - back through the intake manifold & then the carb.
Check the FSM. The marks are there, just buried.

Don`t give up.