Voltage cycling
Newly installed go efi 4 kit that included a force fuel. All new wiring throughout. Grounds cleaned and verified.
Engine starts, shows normal voltage. Engine runs for a few seconds, stumbles bad, then recovers. It will do this over and over until it stalls. pressure gauge shows pressure, then it falls fast nearly to 0 then recovers. This repeats.
multimeter shows that the force fuel is getting 13v during crank and during idle, but then it will drop to 0v for a second, then recover. This repeats.
I checked the fuel pump PWM setting. It’s set to the default 74.9%. I set it to 40% which the original FCC seemed to need, but this didn’t change anything. For testing purposes i set it to 100%, which i would expect it to never pull power at all. The power cut continues.
I’ve already emailed fitech and am hoping for a helpful response soon. Anyone else run into this issue?
Fitech support was able to get me going:
There is however a some settings in the software to change since the voltage is cycling, that would indicate it is in the EFI not the force fuel. First make sure the white ignition lead of the fitech EFI is getting battery voltage when the key is on. In the main menu go to display set up and change pro calibration from Hide to Show. Go back to the main menu and go into Go EFI PRPO Tuning. In here towards the bottom of the menu look for fuel PUMP Control. In here change volts for pump on from 9 to 19 and send to ECU. Also in here look for PWM low mid and high and change the low to 60 and the mid and high to 100. Once you are done turn the key off for 20-30 seconds and then turn the key back on and see if the pump turns on. If it does power up the circuit is good and you should be good to go from there.