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Y-Blockhead · 12-28-2019, 02:56 PM

Sounds like you checked all of the normal things. You don't say but did you check the pistons and rings? Maybe stuck rings or collapsed ring lands from the back fire? Hard to believe it would happen to two cylinders but...

Just thinkin' outside the box.

Have you done a leakdown test?

12-28-2019, 02:56 PM	#2
Y-Blockhead Senior Member Join Date: Jul 2011 Location: Redondo Beach, CA Posts: 5,849	Re: Wierd compression Sounds like you checked all of the normal things. You don't say but did you check the pistons and rings? Maybe stuck rings or collapsed ring lands from the back fire? Hard to believe it would happen to two cylinders but... Just thinkin' outside the box. Have you done a leakdown test?