I have an annoying problem after running my car for more than a couple of miles when i switch of the engine it nearly always responds with a loud gunshot from the exhaust. I have read this is due to unburnt fuel in the silencer. My 652cc engine is fitted with weber 40dcoe (not ideal) & high lift cam with 123 ignition. I also have an electric fuel pump with a cut off switch on under the dashboard. As i can’t seem to stop the backfire.
Could anyone advise if I were to switch off the fuel prior to turning off the ignition, 1st would it do any harm? 2nd is it likely to cure the problem? The main reason for trying to stop the backfire is we are moving to an apartment with an underground car park & I don’t want to upset our new neighbours before we have moved in.
Could anyone advise if I were to switch off the fuel prior to turning off the ignition, 1st would it do any harm? 2nd is it likely to cure the problem? The main reason for trying to stop the backfire is we are moving to an apartment with an underground car park & I don’t want to upset our new neighbours before we have moved in.