With all the modifications I was starting to have problems getting my car tuned with Motronic. I therefore decided to purchase a PnP VEMS, wideband lambda and EGT sensor.
The package arrived promptly down here in South Africa!
I then did the crank home polarity change and plugged in the VEMS.
I installed the latest version of vemsTune http://vems.hu/download/v3gui/vemsTune-Install-2008-09-03.exe using firmware_1.1.27.
The car started first time but was way too rich - I changed to injector_727cc.txt and the car started running nicely! I have not installed the WB lambda or the EGT yet.
Next step was to verify that the sensors all gave to correct reading. I noticed that MAT reading and CLT readings were not correct.
I tried to load a different CLT file and vemsTune showed a fatal error and said something like "ECU in Boot Mode."
I can now not communicate with the ECU at all "ECU not connected"
Update
I found instructions at http://vems.hu/www.vems.co.uk/forum/index.php?topic=209.0 to solve the problem. I switched the ignition off, bridged pins 2 and 3 on the serial cable from the ECU, switched ignition back on, removed the bridge and plugged in again.
I ran tools\megaloader.exe firmware\upload.hex -wE 38400 -c com1 from v1.1.27 of MegaTune but it failed due to flashing problem. No communication again. I redid the bridging exercise and vemsTune connected to the ECU and said it was in "Boot Mode". When I tried to upload firmware, I got the following:
Erasing all pages...(be patient)
Erase OK!
Fatal error: OUT OF SYNC unable to send address at page: 3
Fatal error: OUT OF SYNC unable to send address at page: 8
Fatal error: OUT OF SYNC unable to send address at page: 9
Page write checksum error at page: 10!
Fatal error: OUT OF SYNC unable to send address at page: 17
Page write checksum error at page: 18!
Fatal error: OUT OF SYNC unable to send address at page: 19
Page write checksum error at page: 20!
Fatal error: OUT OF SYNC unable to send address at page: 21
Fatal error: OUT OF SYNC unable to send address at page: 22
Fatal error: OUT OF SYNC unable to send address at page: 23
Fatal error: OUT OF SYNC unable to send address at page: 24
Fatal error: OUT OF SYNC unable to send address at page: 25
Fatal error: OUT OF SYNC unable to send address at page: 26
Fatal error: OUT OF SYNC unable to send address at page: 27
Error detected ECU left in BOOT Mode!
It popped up a window "Firmware is different - More details can be found on Debug Tab"
Please help!