a gas line over the muffler may have broke, or you car is older then 20 year old
your car is burning oil.
You have to much oil in your fuel/oil mix
The muffler makes your car run quiet
worn out muffler bearing
If gas is leaking from a Yamaha Razz muffler, then the float may not be set correctly. This means that it is not shutting the intake off.
no
2 examples are Gas analyzer-inserted in muffler Mass airflow machine-inserted in muffler Both measure gas emissions released from a vehicle.
Check your catalytic converter.
The problem I had was oil and gas flowed out the muffler on my snapper 11 hp lawn tractor. To fix it I had to drain the oil and get a new plug. The issue that caused it was I needed a shut off valve in the gas line to stop the gas frome running back into the engine and eventually getting into the oil causing it to gush out the muffler with a lot of smoke. It is an easy fix and it now runs as smooth as new. I hope this helps you
A free flow muffler can improve mileage but by not by much. It would take a long time to recoup the cost of a new muffler.
your gas line may have come loose or your muffler could be clogged, its something little a repair shop wouldn't charge much. tripthebiz
I try starting it, kik start it. no ignition but gasoline starts pouring through the pipe and muffler