I think that I've confused the issue by calling the loud banging noise come from underneath the car 'backfiring'. There isn't any flames/smoke shooting out the intake manifold as in a real backfire. This one is caused by air getting into the front resonator and causing a loud banging noise. Is there a term for this ?
Yes, I've got a SPICA and the micro switch did work in the past. But the hole in the muffler, it is hard to tell if it is still operating. Anyway, I removed the exhaust in an attempt to weld up the hole only to find that the resonator is too far eaten with rust to be repaired with a MIG welder - I just blew more holes in the carcass. And I found out that the exhaust bracket that is attached to the tranny was loose - the nuts that held it on to the tranny studs were all gone. This might account for the cracks in the resonator - no support. Looks like I'll be replacing parts of the exhaust system with either OE type equipment or go with an entirely new system as in the Magnaflow SS Bruce > Date: Fri, 27 May 2011 14:34:03 -0400 > From: "skip" <[email protected]> > Subject: [alfa] RE: GTV muffler / backfiring > > Carl, > Do you still have the SPICA on that '73 GTV or have you converted to > carbs? > If SPICA, the problem is probably the micro switch that controls the > fuel > shut off solenoid. > Skip Patnode > '67 Duetto > Norfolk, Va > > Date: Tue, 24 May 2011 09:58:51 -0500 > From: "Carl R. Davis" <[email protected]> > Subject: [alfa] RE: GTV muffler / backfiring > > >> From: Bruce Giller <[email protected]> > > Subject: [alfa] Muffler suggestions for GTV > > My exhaust system is all stock and I've located a long crack in the front > resonator (on the weld where the pipe enters the resonator at the front) > and > a smaller on on the middle muffler (same location as the resonator) on my > > '73 GTV. Lots of backfiring from the resonator on deceleration is the main > problem and I'm sure that the cracks will not heal themselves...where are > our Alfa repair nano-bots ?! -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
