Wally Teto wrote:
> What is the main cause of exhaust backfire? I can't believe how rich
> I have to adjust my SU's to get rid of it. Adjusting the carbs via
> the
To get a backfire three things are necessary fuel, oxygen and ignition
source. These occur several ways:
running lean (doubtful from your description)
an exhaust leak (allowing oxygen to enter the exhaust)
ignition misfire (allowing oxygen and fuel into the exhaust)
and on vehicles with an air pump (the MG) malfunctioning a diverter
valve (gulp or anti-backfire valve)
You should check the gulp valve, if this is OK check for exhaust leaks
and the ignition system. The gulp valve is the most likely cause. The
valve is suppose to stop the outlet of the air pump from going to the
exhaust when decelerating.
|