need a new engine most likely. driving dry or on low oil for a few miles will cause that..it will be cheaper for you to just get a used engine with lower miles from a junk yard than taking it apart and rebuilding it..
what engine?
Poor preventative maintenance is a leading cause of vehicle breakdowns.
a bad sensor. the alero is notorius for many bad sensors. not an expensive replacement though
The RPMs and the engine of the 2001 Oldsmobile Alero might surge if there is a problem with the oxygen or fuel sensor. It may also surge if there is a problem with the fuel injectors or the fuel filter.
a cracked head
The Alero is made by Oldsmobile not Chrysler. My first suspicion would be a failed fuel pump or clogged fuel filter.
If the car has high miles, try checking the catalytic converter. If it is clogged it will cause the vehicle to lose power.
There are a couple of reasons why a 1999 Oldsmobile Alero ac heater to stop working. The heater coil may need to be replaced or the HVAC blower motor may need to be replaced.
You will need be able to fix it as you need a machine that can cause a vacuum inside the system. You have to take it to a shop and it will be expensive.
it could be numerous posibilities. i would have my timing checked, and also m vaccum hoses, there may be a leak.
The oil pressure is dropping at this time. A clogged oil filter, clogged oil pump screen or failing oil pump can be the cause.
A hole in the muffler would cause a knocking sound in your muffler. A loose exhaust pipe can also cause a knocking noise.