Hmm,i dont have a PD engine but i have a same problem.I also bought a used tuning box without instuctions or knowing the manufacturer.It came with 8 pin conectors (had only 7 wires???)and with a adjustment screw to turn it up and down.
It had 4 wires going to the box (blue,red,,black and grey).I made around 80 000 km with it and i had no problems.
As i bought me a new ride with a ALH engine that has a 10 pin conector to the pump.
Here is a pic of a old one:
I simply cutted off and mooved it in the same positions on a 10 pin conector and my car is going great (spins 225 wide tires in whole 2.nd gear).
My confusion comes again since a buddy of mine has bought some simmilar thing with 8 pin conector and now he wants to fitt this ina new Beetle but he has only 2 wires going to number 2
into a conector harness.
Since it has only 2 wires i suspect that he bought a very expencive (100 euro) evry mod in a fancy box.
Now im not shure whot tipe do i own,my conection is between numbers 2
and also between 4
in the harness.
I eager to know for whot that conection(4 and 5) stands for so if any one can help me i would be very thankful.I don want to open my box,i could break something
So,any help or a link for me and a Marcus from the post above?