The timing will be off and the engine will have no power and get poor mileage. In some cases if the engine is an interference engine you could have serious internal engine damage if the belt is installed incorrectly.
It won't happen unless you buy an aftermarket high performance PCM like an El-Diablo or something. There is no separate "chip." The PCM is programmed the way it's programmed by the manufacturer, and that is the way it is. I guess you may be able to buy an aftermarket "programmer," but I have seen a whole buncha car engines totally messed up by that stuff, including the aforementioned high performance PCM's. These engines are simply not made to handle the stress of performance enhancers, that is why there is protection software installed into the PCM. But I realise that some folks just have money to burn on replacing engines.
It will usually cause severe vacuum leak(s). The fuel will not enter the system correctly and the vehicle may not even run,
yush
If you do replace it correctly, it will work as designed.
we have no structures correctly
Njc all the way
You will not be able to hold any memory
leakage will happen and the seal will be worn in a short time after installation.
Nothing
The thermostat will not open properly when installed backwards. The coolant will not flow and the engine could overheat.
He would be eaten by Gollum
Improper performance.