Backfiring through intake
#11
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Bad plug can and will do it.
Bad distributor pick up can do it.
Weak or water in fuel can do it.
As Sutphen30 said, valve not seating can definitely do it. So could a broken valvespring.
As with all driveability issues, basics must be done/checked first. People's minds like to scatter and lose focus before this happens.
Bad distributor pick up can do it.
Weak or water in fuel can do it.
As Sutphen30 said, valve not seating can definitely do it. So could a broken valvespring.
As with all driveability issues, basics must be done/checked first. People's minds like to scatter and lose focus before this happens.
Last edited by SB; 05-09-2017 at 05:35 PM.
#16
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If ir backfires thru the intake with every revolution while running you have an ,exhaust valve Not opening,, pull the valve covers ,,check if a rocker arm stud broke or pushrod came off,,, I broke an exhaust rocker arm stud years ago, it popped thru the carb. with every revolution when running,, compression will check out ok because the valve is closed.
#17
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If ir backfires thru the intake with every revolution while running you have an ,exhaust valve Not opening,, pull the valve covers ,,check if a rocker arm stud broke or pushrod came off,,, I broke an exhaust rocker arm stud years ago, it popped thru the carb. with every revolution when running,, compression will check out ok because the valve is closed.
#19
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Turns out I had bad manifold that leaked over the winter. When I started it up, had stuck valve which caused bent pushrod and a few other bad things to happen.