I have 92 Camaro 305TBI with 700r. When you put the car in gear it dies. I have checked for vaccum leaks lines brake booster intake ect no leaks or crimped lines.Replaced the TCC solenoid and torque converter. I have no codes when scanned. I have replaced the ECM, MAP sensor, TPS, IAC, EGR and O2. I have good fuel pressure and rebuilt the TBI. And did a complete tune up. Car doesnt miss or hesitate and has plenty of power when your driving it.The only way I can keep the car from dieing is to turn up the idle screw until the car idles at 1500 rpms and then it drops to 700 rpms in gear. I have even ran a can of seafoam through the intake and one through Throttle body to see if this would help. I tried unhooking the CAT and still same old problem. My only other thought is the park neutral switch. Does anyone else know what it could be.

 

You seemed to have taken care of what I would have done first. The neutral safety switch just keeps you from starting it in gear. What kind of converter did you replace it with?

 

the neutral safty switch sends a signal to the tcc solenoid and a signal to the ECM which should go to IAC to idle the car up? But I am not sure if I should change it I also have thought maybe under the egr the intake could be stopped up. I wondering if my prob is in the intake.