Remove toxic
That could be a leaking exhaust system. A leaking exhaust system is very dangerous! Please have it checked out ASAP.
When system is leaking exhaust fumes When system is rotted and falls off vehicle
No.
you may have s mall or big hole in your exhaust system. have it check out.
Are you referring to a loud exhaust sound? If so, it could be (Going from the engine back to the tailpipe) a cracked or leaking exhaust manifold - a leaking exhaust pipe - a leaking catalytic converter - a leaking muffler. That covers the exhaust system. If you are talking about a noisy clattering sound in the engine, you could possibly need a valve adjustment.
yes, if the trans fluid is hitting the exhaust, but not out of the pipes coming from the outside of the pipes.
If it is leaking or rotted
The exhaust pipe was leaking.
you must have air leaking into the exhaust system that will cause backfire when you decelerate raw gas goes into the system
Worn piston rings, bad valve seals,
You aren't leaking fuel out of the exhaust. That's water out of the cooling system of the engine. You need head gaskets, heads, and or an engine block.
Yes, if the fluid is leaking on the exhaust or the belt is slipping badly.Yes, if the fluid is leaking on the exhaust or the belt is slipping badly.