3.4 runs bad cold (Page 3/3) Jim Jimenez SEP 23, 07:27 PM Thanks! I'll try that and get back to y"all.. lou_dias SEP 25, 06:40 PM I used new Camaro 3.4 injectors in my old 3.4 Formula with no tuning on the stock ECM and it ran great. Mickey_Moose SEP 27, 10:09 AM The 7730 ECM is not stock to the car and I assume since you swapped it into your 88, the 88 is also running a 7730 (there are wiring changes needed to run the 7730). When you say running a stock EPROM - stock for what car (what tune is on it)? You stated the "other" 88 is an automatic, is the 3.4l and automatic? The code is a fair bit different between the 2 cars. All comes back to what code are you running, what are the exact specs of the car, who rewired the 3.4l car? As other said, get a scanner on the car and see what it is doing.