My 89 camaro rs has a 305 tbi and it is running ruff at idle and acts like it is missing while running at high way speeds. Another problem i am having is when i put the gas peddel to the floor it wants to run good for about 2 seconds and cut out and die, sometimes it will shut off and sometimes it will come back on after dieing. the last problem i have with it is when i hit the brakes to make a rapid stop it will stall out. I Have a timing light and have it timed dead center. I have put new plugs, rotor, wires, and cap on it and just replaced the throttle position sensor thinking this would fix it but with my luck it didnt. I need your help, i hate to see my camaro like this. im not shure if this could be a part of the problem but i have a 91 brain and 91 tbi on it.

 

Have you checked your fuel pressure?

 

what would be the easiest way to do so??

 

Well there's really no easy or hard way of going about it you just need a fuel pressure gauge thats designed for use on TBI equipped motors. Once you have it it should include directions on how to use it.