Been trying to sort this out for a bit know. I'm trying to program a AB28F400 chip using a Willem GQ-3X Burner. Problem is actually not with burning the chip. I have verified the chip flashes properly. Can write the file, read the file and verify it is the same. Problem is once the chip is in the PCM I cannot communicate with scanner or with winflash. Can only bench test it as my engine is not running. What am I doing wrong? Chip is mounted to a PSOP44 PCB board kit from "chip-service.de" and the pcm has headers soldered to it. Solder is good. I've verified with VOM. I've also tried two different pcm's that I know work.