[Healeys] BJ8 Backfiring

Freese, Ken Ken.Freese at Aerojet.com
Mon Sep 20 13:09:55 MDT 2010


I somewhat recently cured a vacuum leak, by installing a new manifold gasket
and tossing the brass nuts into the trash can. I could see evidence of the
leaks on the gasket and the manifold and exhaust blowing as well. The WD 40
test did not reveal a leak. The smoke machine did not reveal a leak. With Kirk
headers and stock heat shield, I could not get to the underside of the
manifold to spray anything. Maybe one could on a lift, I don't know. I just
knew there was a leak because of the way it ran and knowing about a short cut
I took after the engine rebuild that I shouldn't have taken.
Ken Freese
65 BJ8

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of Jon Buhler
Sent: Sunday, September 19, 2010 12:42 PM
To: healeys at autox.team.net
Subject: [Healeys] BJ8 Backfiring

Fellows, your thoughts please.  Backfiring under acceleration.  Have checked
all of the usual problems, carbs, fuel pump, plugs, distributor, timing, etc.
If it is due to a vaccuum lieak, what is the best way to check for this?
Thanks,

Jon


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