This is commonly caused by a fuel mixture that is too rich or improper spark n timing
A large backfire is most likely caused by a bad spark plug or plug wire. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Also check your ignition timing, if it is late and you have a rich mixture you can get a backfire. An exhaust leak will let air enter the exhaust under deceleration and cause a "popping" sound.
what is making my Lincoln ls v8 backfire under the engine
iT SOUNDS LIKE IT'S OUT OF TIME ARE THE PLUG WIRES ARE CROSSED ( ON WRONG )
Four cylinder, it is on the back of the engine under the exhaust manifold. Six cylinder it is on the front of the engine, below the exhaust manifold.
The metal disk part of one of the valves (intake or exhaust, usually the exhaust as it is under the most stress in operation) in one of the engine's cylinders has cracked. This allows gasses from the cylinder to escape, causing that cylinder to be "weaker" than the other ones, increasing engine vibration. If the crack is in an exhaust valve (as it usually is), unburned hydrocarbons in the escaping gas will cause the car to fail emissions testing. If the crack is in an intake valve, very hot escaping gas can cause a type of "backfire" in the engine's air intake system.
Depends on the year and the engine. Under the exhaust manifold or under the intake manifold.
the front of the engine under/around the exhaust
I do not know of any snowmobiles that have a button like that. They all have a kill switch that shuts the engine down, and if you push it while under higher rpm's and release it, than there is a chance for backfire.
On the 2.5L, it is under the intake/exhaust on the back of the engine. On the 3.0L it is below the exhaust manifold on the front
Catalytic converters are part of the exhaust system under the vehicle. They are right after the exhaust pipes come down from the engine
On the 2.5L, it is under the intake/exhaust on the back of the engine. On the 3.0L it is below the exhaust manifold on the front.
Yes, if it is leaking or if when it was replaced, oil leaked onto the exhaust or exhaust manifold.