Bad acceleration on 2001 alero - 2001 Oldsmobile Alero

First thing I would do is check Transmission fluid level
https://repairpal.com/checking-fluids-149
http://www.aleromod.com/forums/showthread.php?t=37901
https://classicoldsmobile.com/forums/alero-21/2001-alero-transmission-fluid-level-2878/?styleid=1
I am thinking this video below may be helpful
https://www.youtube.com/watch?v=ITy3tGof7KA

Is check engine light on, if so check for fault codes.
Link below may be some food for thought now clear solution to sluggish running
https://www.2carpros.com/questions/oldsmobile-alero-1999-oldsmobile-alero-stumble-and-loss-of-power-3000rpm
https://www.yourmechanic.com/estimates/oldsmobile/alero/car-is-slow-to-accelerate-inspection

Failed Transaxle

How can you not know that ??

Is the temp gauge working?
where is it spewing from?

• Sounds like you have some really fouled plugs. I would start with a tune up or plugs and wire at least. When your plugs, or even one plug, get fouled it creates a misfire and when at a stop light etc the cars will shake a bit and almost feel like it wants to **** a bit. Then when taking off it putters and lacks proper accelerations abilities.

• Also make sure to use good gas as bad gas will cause some sluggishness too.

• Hope this helps.

p1227 Oldsmobile Injector 2 Control Circuit Shorted
p1245 Oldsmobile Intake Plenum Switchover Valve
p1275 Oldsmobile Accelerator Pedal Positioning (APP) Sensor 1 Circuit p0300 Oldsmobile Multiple Engine Misfire Detected p0172 Oldsmobile Fuel Trim System Rich (Bank 1)
sounds like bad injectors for one and computer needs relearned or replaced unfortuantly u gotta goto to the dealer have diagnostics ran

Start the car and have some stand behind the vehicle while it is running in park and rev the engine to see if exhaust gases are coming out, if not sounds like the cat converter is clogged.

You did not mention the ignition coil housing cover these are famous for carbon tracking resulting in miss. Even close inspection usually does not reveal the issue I would replace it.

Clogged catalytic converter ! Have exhaust back pressure tested .

MAJOR ENGINE PROBLEMS DONT DRIVE TILL U GET TO MECHANIC, SOUNDS LIKE ITS TOO LATE

probably dirty injectors,most likely fuel pump.when the fuel pressure is low,it will idle fine but when you want to accelerate it will not get enough fuel