Hi, I own a 2.7t 2001 audi a6 with 180k miles and it has been idling rough especially with the A/C on and it also has so many misfires when I floor it that gaining speed quickly has become very hard to do. I have to moderately press the gas, never flooring it, for it to not buck/misfire.
I have the VAG and it reads misfires on all cylinder and also exhaust gas temp sensor #2.
I took it to the mechanic and they told me a piston ring is bad so I need a new engine. I found it hard to believe one bad piston ring causes misfires in all cylinders.
If I were to replace the EGT #2 do you think it would solve my problem? Can the EGT cause the misfires? If so can you explain why.