It's original a NPN transistor, type NEC 2SC2719, and this type isn't in production any more since several years. But you can just use a more common type with the same or better technical datas, so my buddy choosed a BD139 as replacement.
This is a very standard type and available from nearly every semiconductor company, for example Texas Instruments, STM, Motorola/Freescale, Fairchild, Siemens, Philips and so on. Here are a few datasheets for BD139: http://www.alldatash...earchword=BD139
Anf here is a document which describes the original one: http://www.datasheet...article=3746501
As you can see, the BD139 is far better, but because it's such a common part, it's really cheap. One piece cost about 0.50 US$ here in Germany. The replacement is easy, you can do it with basic soldering knowledge.
So, the ECU now works fine as it should! I write an article for the USRM in within the next hours!
AND: My problems regarding acceleration are gone!! So it seems that the ECUs interchangeable to some degree and the engine should run, but it runs bad. The test drive was a real pleasure
