help me!!! backfiring

Lowrider · Post by **Lowrider** » Sun May 27, 2001 10:48 am

I have a 1600cc powerplant with dual kadrons a little bit of a lumpy cam and a four tipped monza. When i turn off the car there is about a five second delay then BOOM little kids go running and screaming people run for cover, I scare people. Please help me.

Y3K · Post by **Y3K** » Mon May 28, 2001 12:42 pm

In my younger days, you drove along, switched the ignition off for a second and had this "boom." Could never figure out what caused it. High compression of oxygen and fuel?

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Kobus

Proud owner of a "SUPER" Standard Beetle

aussiebug · Post by **aussiebug** » Tue May 29, 2001 11:31 pm

<BLOCKQUOTE>quote:<HR>Originally posted by Y3K:
In my younger days, you drove along, switched the ignition off for a second and had this "boom." Could never figure out what caused it. High compression of oxygen and fuel?<HR></BLOCKQUOTE>

When you turned off the ignition, you were still feeding fuel/air mixture through the engine, filling up the exhuast system. When you switch back on, the next charge of super hot exhaust lights up the unburned mix in the muffler - boom!

Rob

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Rob
Rob and Dave's aircooled VW pages
Repair and Maintenance for the home mechanic
http://www.geocities.com/aussiebug1970/index.html

Y3K · Post by **Y3K** » Wed May 30, 2001 12:25 pm

<BLOCKQUOTE>quote:<HR>Originally posted by aussiebug:

When you turned off the ignition, you were still feeding fuel/air mixture through the engine, filling up the exhuast system. When you switch back on, the next charge of super hot exhaust lights up the unburned mix in the muffler - boom!
Rob
<HR></BLOCKQUOTE>

Txs Rob, now many years later I have the answer.

But what could cause the boom in this instance? All I can think of: some red hot carbon somewhere in the exhaust?

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Kobus

Proud owner of a "SUPER" Standard Beetle

Cpt Zoomy · Post by **Cpt Zoomy** » Wed May 30, 2001 12:33 pm

Sounds fun to me!