Lack of power problem solved

I recently purchased the car listed above it is an automatic with 128,000 miles on it.

Everything is fine on it other then when accelerating from a stop. The engine likes to ping, and it takes a while to get up to speed.

At higher speeds around forty to fifty plus it will not go over 3000 rpm's. If you let off the gas it is jumpy (feels like inside the transmission or something) the transmission fluid is full and all other fluids are at sufficient levels, it lacks power and bogs out if you push the pedal all the way down. Climbing hills it likes to loose a lot of power as well.

I will be changing the fuel filter tomorrow, Spark plugs and wires have been changed.
I figure it could be a number of things like timing, maybe a transmission problem.

Checked the air filter out and cleaned out a small mouse nest from that. Seemed to be some part of the problem, but still has the same lack of power and not liking to get over accelerated/shifts weird.

The check engine light is not on. ( I hear they do not come on very often even if there is problems at times with o2 sensors and stuff on these earlier models *possibly lol.

It runs good other then when you try to accelerate (engine ping), let off the gas while going over thirty mph (gets jumpy) or go over forty to fifty mainly around sixty mph on average at 3000 plus rpm's. (Lacks power and bogs out after 3000 or gunning it.)

Thanks, Jay