- Joined
- Aug 14, 2014
- Messages
- 4,309
- Reaction score
- 1,355
- Location
- Madison, WI
- My Car
- 1971 Mach 1 w/408C stroker
I have been dealing with an intermittent issue related to the handheld controller of my FiTech EFI. The handheld will go off randomly until later that it has finally gone off for good, which is a good thing because I have been able to troubleshoot it.
The short story is that power was not getting to the handheld. I can measure 12v at the plug that comes from the EFI, but the handheld does not turn on. I know it is the handheld not turning on instead of the screen. I first thought it was the jack in the handheld, but I was able to find a universal power supply with a similar plug that is able to turn it on. So what I have now is a handheld that can I can turn on with a universal transformer/plug but not with the power plug coming from the EFI. However, the strange thing is that I am able to measure 12v on the plug coming from the EFI. So could there be something in the electronic circuit of the EFI that allows me to measure 12v at the plug, but when under load from the handheld it is losing power? It would be hard without cutting into the line to measure the voltage while the handheld is connected, but that may be an option.
At some point I thought it could be the plug on the line from the EFI so I replaced it with the same result. I actually tried the same plug fed with power from the EFI and power from the power supply to find the same issue. It doesn't work when powered by the EFI even though I can measure 12v. :classic_angry:
The short story is that power was not getting to the handheld. I can measure 12v at the plug that comes from the EFI, but the handheld does not turn on. I know it is the handheld not turning on instead of the screen. I first thought it was the jack in the handheld, but I was able to find a universal power supply with a similar plug that is able to turn it on. So what I have now is a handheld that can I can turn on with a universal transformer/plug but not with the power plug coming from the EFI. However, the strange thing is that I am able to measure 12v on the plug coming from the EFI. So could there be something in the electronic circuit of the EFI that allows me to measure 12v at the plug, but when under load from the handheld it is losing power? It would be hard without cutting into the line to measure the voltage while the handheld is connected, but that may be an option.
At some point I thought it could be the plug on the line from the EFI so I replaced it with the same result. I actually tried the same plug fed with power from the EFI and power from the power supply to find the same issue. It doesn't work when powered by the EFI even though I can measure 12v. :classic_angry: