[Critter]

Interesting.

You said, "Can't seem to get my autometer tach to read right. Ive tried connecting the signal in all 4 modes my tach is capable of and it doesnt want to read at all. It just sits at about 3k and if i really get into it it will go up to 4k or so."

Like I said I have never used a resistor of any type. I just tell the ecm to pull up the signal for the tach and then I adjust the parameters so it is accurate (this is actually a little complicated and if it isn't right the tach will basically not work). I test them all before I send them out and they have all worked. These have all been LS1B ecms using EFILive to flash that I am thinking of. What are the tuners using to flash the ecm? HPTuners?