|
From my experience just about any motor with a large free flowing exhaust will backfire during engine breaking. Engines lean out during engine breaking because the fuel is not needed though there is enough to cause rich exhaust gas which will burn in the exhaust causing a backfire. There are a couple factors that can make the backfire worse such as a leak in the exhaust system, sticking injectors, high resistance in the ignition system causing the fuel not to burn completetly
|