What effect would a blocked tailpipe have on the engine?

A blocked tailpipe can significantly impact engine performance, primarily by disrupting the normal exhaust flow. When the exhaust cannot exit the engine effectively due to a blockage, it creates back pressure, which can lead to several issues impacting engine function.

One of the notable effects of this increased back pressure is that it can cause the engine to fail to start. The blockage can prevent the engine from expelling exhaust gases during the combustion cycle, which is essential for the engine to operate properly. Without a proper outlet for the exhaust, the air-fuel mixture cannot ignite or produce power efficiently, making it difficult for the engine to initiate the combustion process necessary for starting.

In addition to issues with starting, a blocked tailpipe may also result in increased emissions and potential engine stalling due to the improper combustion conditions created by the back pressure. However, the primary and most immediate effect concerning the ability to start the engine is directly related to the blockage preventing effective exhaust flow.