KA PROBLEM!! Need some help.

[snopro420]

I own a 1992 240 fastback with 136000 miles on it. The only upgrade ive done so far is a spec stage 2 clutch cause my old one went. Recently in the past few months my car would idle weird sometime after driving it for a period of time. Also when i shift gears it seems to hesitate for a second and then regain power and when most recently when i get on it threw the gears there is a noticable loss of power and it feels like it takes forever before i have to shift. Within the last 5000 miles i have replaced the distributor cap and rotor as well as spark plugs and wires. I have ran injector cleaner threw too. The only possible answers i have come up with are maybe an o2 sensor or fuel filter. What is causing this and how can i fix it???? Thanks

[Ni2s4s0aSnX]

I doubt its the o2 sensor, though it could be. Fuel filter? Probably not. But I could be wrong. Could be a sensor problem, it could be a problem witht the transmission, but that wouldn't cause a loss of power most likely.

[snopro420]

Yeah im not really sure what it could be... is there any kind of air/fuel adjustment i could make that might solve the problem? I just dont want to start replacing things that dont need to be replaced. Also does anyone know a good place to purchase performance valve train and throwout bearing from?

[slydin'240]

Try cleaning your MAF and throttle body. Just be very careful with the little spring in the MAF.