many threads on this board about them. almost none of them seem to work. i have put a couple of hours into messing with mine, and can't get it right. on the bench everything seems perfect. put it in and it's at least 1/4 tank off. almost everyone says that, 1/8 to 1/4 off.

talk to bill at AM HighTechAuto, (a member here), amhightechauto.com. he will know who is making the better ones out there, for whatever that is worth.