USB to rs232 problems
Car 1
Made a rally BMW 325 install. When making the set up I had no problems but suddenly when driving Vt louse connection and says “unplug usb adapter”
Usb adapter is type http://apple.clickandbuild.com/cnb/shop/ftdichip?productID=160&op=catalogue-product_info-null&prodCategoryID=84
Driver is updated to the lasted one http://www.ftdichip.com/Drivers/CDM/CDM20814_WHQL_Certified.zip
Using Win Xp
Vt 2011-03-11
Firmware 1.1.81
Wiring harness typ vems 6 cyl.
The installation is made like this http://www.vems.hu/manual/vemstune/help2/htmls/main/preferences/ecu_comm_dialog.html
Car 2
Consumer installation BMW 325 turbo.
They has the same problems and we tried to help but nothing will fix the serial problem.
Frimware 1.1.88
Vt 2011-04-26
Win xp
ftdi driver http://www.ftdichip.com/Drivers/CDM/CDM20814_Setup.exe
Can I change settings in Vt or will it help (timeout, ignored error, write delay)
It will be helpful if someone could help out on this one
Thanks Peter
Regarding settings in vemstune, as long as write delay is >25 and timeout is 100 it is not related to that.
It is most likely related to ignition noise, broken spark plug, distributor or plug wires.
- check spark plug wires
- check spark plugs
- check coil(s)
- Distributor cap, rotor etc..
- if coil on plug, check that all the rubber boots are in good condition and clean of dirt, oil or water.
- Use a serial cable extension between usb adapter and ECU (This helped in some occations)
- If using a in car 12V notebook charger, try to unplug, ground can go through the usb instead of the cig plug if the socket is bad.
Also, PC (even a desktop) with real serial port often helps.
We have 2 wireless systems working (that can soon help installers with windows-usb-driver PITA), one with Wifi router (OverTCPWireless), the other (physically smaller) with bluetooth. We're also working on zigbee.