I have been searching for days and cant find this so im hoping im not duplicating an existing thread. I have a new to me 89 gta 350tpi. I had to replace the ecm and prom after an accidental welding adventure and the only chip i could find in stock was a hypertech stage2 (i wanted bone stock but could not find one). After alot of messing around i found that it had 2 bad injectors so i put 8 bosch 22lb injectors in it from south bay injectors.i also removed the egr and smog pump. Previous owner replaced to starter alternator igniton modual coil distributor plug and wires. She does hard start cold but if i hold the rpms at 1500 for 40 seconds or so she runs fine. The odd issue is if i start the car below 100⁰ gauge temp it fires up and runs and i can drive it all day long no issue but if i dont let it cool below that point i can start it but i have to hold the gas to keep it running even after driving a few miles. If i stop and let it get below 100 before i restart it it will regulate itself fine. Im baffled