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                           Engines-List Digest Archive
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                     Total Messages Posted Wed 06/29/05: 1
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Today's Message Index:
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     1. 06:04 AM - Re: Io360 backfiring  (Gary Casey)
 
 
 
________________________________  Message 1  _____________________________________


Time: 06:04:50 AM PST US
From: Gary Casey <glcasey@adelphia.net>
Subject: Engines-List: Re: Io360 backfiring

--> Engines-List message posted by: Gary Casey <glcasey@adelphia.net>

This is usually caused by very slow combustion coupled with  
misfiring, resulting in unburned fuel being discharged to the exhaust  
manifold.  There needs to be a source of ignition, which is provided  
by the very slow combustion discharging an open flame.  Check to see  
if the air/fuel ratio at idle isn't too rich - just lean out the  
engine under those conditions and see if it goes away.  As suggested  
below, there is the possibility of a retarded spark.

Gary Casey