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Old 09-28-2010, 10:40 PM   #20
WTRoadrunner
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Join Date: Sep 2010
Location: San Angelo Texas
Posts: 11
Re: Backfiring

Did you check the compression on every cylinder? Should be about the same give or take maybe 5 psi. Feel of the valve springs, I found 2 broken that I missed for a while. # 7 and # 8 exhaust. That will cause a pop out the exhaust. With a compression check you know what the cylinder is doing.
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