92projectcamaro

Okay guys i could really use some help! i have a 1989 rs 2.8 auto camaro i do not have the time right now to do a swap so id like to just drive the 2.8 around, but it seems to have different ideas. so the car will start up right away no problems what so ever. and switch into gear and start out fine but as the car starts to warm up and run a little longer 10-15mins it starts acting up alot, when under power te rpms will move around or the car will jerk a little and when id...iling at a read light the rpms can jump from 1500-0 and sometimes the car dies normally starts right back up. 2. for some reason i let a buddy of mine do some work for me when i was on vacation(he has a shop) he changed fuel rail and dizzy cap, i now have no interior gauge lights or shifter lights when i turn my lights on at night. 3. when i turn my lights on at night my tail lights light up but i have no brake lights nothing happens when i press the brakes in, they dont get brighter or anything. Any help solving any of these problems espically the motor one seeing im in jersey and need to pass state inspection Asap Thanks!