So I have a 91 na, when I drive it, it acts fine for the first minute. I can put the pedal to the floor and take off. But after that 1 or 2 mins I can't push the throttle down more than halfway or it will bog down like I'm flooding it with to much gas or somthing. Any ideas?

 

Do a tune up and see if that fixes it. Also run some good injector cleaner.

 

It's an all stock 91' N/A?

If so, you may have a fuel injector that is stuck open.

Strap/secure the injectors to the fuel rails. Unbolt and remove the fuel rails. (There's an illustration of this in the 89' FSM. "Fuel and Emission Control Systems" F1-56) - Obviously you do not remove the injectors or any of the fuel lines. Be sure to set some rags or something under the injector's fuel outlet nozzle, to absorb fuel in case they are stuck open. Jumper the yellow fuel pump test connector at the passenger side strut tower, near the AFM. Turn the key to "ON"... Not to "START". You'll hear the fuel pump running... Now go check the injectors to see if they are spewing/leaking.

If you do not have a Factory Service Manual, here is a link to the 1989 FSM "Fuel and Emission Control Systems": http://foxed.ca/rx7manual/manuals/19..._non_turbo.pdf

 

Sounds like a bad cat

 

Sorry I forgot to ad that its not. All stock. I have a racingbeat single exhaust and a few other simple bolt ons but nothing that could cause what's going on.