95 Firebird Convert Starter and lack of power issues HELP!

[AllGenTransAms]

Two issues I am faciung with my 95 Convert, 6 banger automatic.

1. Have to change the started and looks like I need to drop the pipes and unhook trans lines, is this correct?

2. Lack of power I mean REAL lack of power like running on 4 instead of six.
I have changed:
Oxygen sensors (both)
Both sensors on the air intake hose.
Larger pack sensor on the passenger side of the engine by the fuel injection. (above the P Side Oxygen sensor.

No difference,
Does not smoke tick or know just NO power we live on a mountain and I have to pull 2nd gear just to get up it.

Ideas suggestions?

Thansk guys!

[transampete]

cats clogged, I don't know.

[NjbadSS]

Is the car throwing any codes? I would agree with TRANSAMPETE, I have seen cats get clogged and you will feel like you have no power. Also, when is the last time the car had a tune up?

[AllGenTransAms]

No codes, I tried that service engine soon light light flcikers here and there but the check engine light does not appear and hence no error codes showing.

[sweetbmxrider]

wait, the service engine soon light is flashing? that is a "check engine light" and they flash when you are experiencing a severe misfire which could lead to cat damage.

the starter can probably be wrestled out with the exhaust in place. dropping the trans lines would help.