Massive blowby?
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Fleet Mechanic
Joined: Jun 2019
Posts: 1,898
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From: Southern California
Massive blowby?
Trying to start a motor home that has been sitting for lord knows how long. ten years or better by the registration. Have a hot battery, outside fuel source, clean plugs that spark. Also have what seems to be excessive blowby. While cranking, with the oil cap off you can feel a steady frow of air with a regularly timed puff like a hole in a piston almost. Compression ranges from 80-120, with throttle open and oil in the cyls. Was fogging it with starting fluid spray while cranking and could see the mist being blown out of the4 cranckase. Am I wasting my time trying to start it to move the RV? How can I make it fire??
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