Some how I lost my tuning cable and adapter. It's a ms3bpnp. The cable connected to the ecu has a male serial plug. All of the serial to usb adapters that I can see are male serial to usb. I guess I need a female to female adapter and I can't find it anywhere. Can anybody help me?

 

Are you talking about an RS-232 to USB adapter? They should be readily available in both male and female varieties...
Here's my hideously ugly google search:
https://www.google.com/search?newwin...&bih=730&dpr=1

 

I've used this brand before. One that was a short adapter and this longer cable: https://a.co/d/9PJfhyz

 

I managed to find this one. Because it has the female plug I don't need an adapter.

 

Glad you found something that will work!

 

I got my cable. I also found my original one. I hooked it up to the serial cable that I've always used for tuning. It didn't connect to the ecu. I pulled the ecu and the serial cable had been smashed into the firewall and it was bent. I assumed that the serial cable was now toast. I ordered a new serial cable. I plugged it in and still didn't connect. I tried both the new adapter and the old with no success. I need to change the tune. It's been over a year since I used it before. I don't know what to do. Anyone have any ideas how to trace this down? I'm not a very good mechanic and electrical, computer issues are my weakest spot. Any information that I can understand would be greatly appreciated.

 

I don't know much about the ECU side of things, but the next troubleshooting step I'd take is to go back to the original ECU cable and serial cable (the last known good cables) and try with a different computer. If it still doesn't work then try each of the new cables with the different computer, and finally both of the new cables with the different computer. If it still doesn't work then I'd suspect the ECU.

Hopefully someone with more ECU experience can chime in though!

 

The first thing to check is if your laptop is recognizing the serial/usb adapter. Once you connect the adapter, it should show a COM port in device manager. Right click the Windows logo and go to Device Manager then it should show something like this:



If it is not showing up, it means the FTDI drivers are not installed or you may have a non-FTDI or counterfeit cable. If it is showing up, then the next step is to check the adapter and the serial cable are properly connected, and likewise in the ECU side. Lastly try creating a new TunerStudio project to make sure the connection settings are correct. You could post your current connection settings so we can verify them, but they should be:

Driver: Standard Protocols Driver
Connection Type: FTDI - D2xx driver
Device Serial: Auto
BaudRate: 115200

 

DIYAutoTune sells a cable specifically for the megasquirt. It is a shielded cable and states "Trouble Free". It also lists having a FTDI chip which is apparently the magic sauce.

 

I found my old adapter that I got from diy. I managed to hook just that up to the ecu. It connected. I looked at ftdi cables and they all had a usb end. The serial cable I bought didn't work. Maybe it was a defective one from amazon. All I need is another serial cable that works. I'm going to try Office Depot and see what happens.

 

I wound up just ordering the cable from diy.