ERROR DTC 51?? please help
I've got three memcals and two of them will not work in the car. All three of the chips will read, write, and compare to buffer fine. It's just that 2 of them do not want to work inside the car. When you put the car in diagnostics mode (with paperclip) it holds a steady SES light and fans on. You then have to put the known good chip in to get the 51 DTC code out.
I'm programing with a PP2 and tunercat and erasing with a dataerase2. I'm using spare stock memcals and the chips that came with them. I"m also using the 28 pin header to connect the memcal to my programmer. THe car is a 93 LT1 speed density (came with 27c256). Oh and I'm burning the chips with 12.5 volts.
What could wrong with these memcals??