still no restart after tuning then shutting off (Page 1/1) firedfiero JAN 16, 10:58 AM I have an 84 Fiero, was 4 cyl., has 2006 grand prix 3800sc now, using HP tuners, we can write calibration or full write on the tune, car will start, run and drive, if I shut it off and wait 30 seconds the car will not restart, there is spark while cranking, but no injector pulse, has a Swap Specialties wiring harness that is less than great, we have found several wires in the ECU pinouts on the black connector that were in the wrong spots, any ideas if there may be a wire missing to the ECU? Or a wire missing that is not allowing it to retain a tune when shut off? Does anyone have their pinouts for a similar year and series engine swap that we could use to check ours.