Leak Down Question
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
Does the exhaust pop on decel? Does the carb spit or backfire? Just making sure you eliminated an exhaust leak.
I know you checked for an intake leak with carb cleaner, but what you describe sounds like an intake manifold leak. I would check, or maybe just replace gaskets, and check condition of manifold. Good luck.
I know you checked for an intake leak with carb cleaner, but what you describe sounds like an intake manifold leak. I would check, or maybe just replace gaskets, and check condition of manifold. Good luck.
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
OK all,, I ran out of things to change out so I installed new intake seals and not just no but hell no it still not fixed. I am really loosing faith.
Problem: Does not want to idle and rear cyl exhaust makes a FLUFF, FLUFF sound after QUICK throttle TWIST. Take it off idle and run thru the gears it's a rocket.. WHAT UP???
Problem: Does not want to idle and rear cyl exhaust makes a FLUFF, FLUFF sound after QUICK throttle TWIST. Take it off idle and run thru the gears it's a rocket.. WHAT UP???
Last edited by aces&8s; Apr 28, 2017 at 07:17 PM.
Thread Starter
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
When I changed the intake seals the ports looked pretty clean. My thought was possibly a sticky valve and sea foam. BUT my compression check on both cyl were dead exact 208 lb. dang if I know.
My wife agreed the FLUFF sound was from rear cyl exhaust..??
My wife agreed the FLUFF sound was from rear cyl exhaust..??
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,193
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From: NW AR
Is there an exhaust leak? That can make some strange sounds. With the motor idling, try blowing some smoke around the exhaust pipes up near the head. See if the smoke moves in unexpected ways.
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Seasoned HDF Member
Joined: Sep 2012
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From: almost there
Ill try it.
Thread Starter
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Seasoned HDF Member
Joined: Sep 2012
Posts: 6,570
Likes: 590
From: almost there
I lit a Cuban cigar and blew the smoke up around the exhaust , kinda looked like the smoke on one side was blowing away but had to run to the bath rm to puke up my supper from the cigar, Geesh.
Ill try a new ex gasket tomorrow if I live thru the nite.
Ill try a new ex gasket tomorrow if I live thru the nite.
Last edited by aces&8s; Apr 28, 2017 at 08:57 PM.
Road Master
Joined: Nov 2013
Posts: 1,216
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From: Buford, GA
You're not supposed to inhale them Herb!