E40 vs alternate 24X ECMs (Page 2/2) Darth Fiero FEB 03, 03:22 PM quote Originally posted by RacerX11: I have experience using a P59 with TAC to control an OE LS4 DBW TB. Once wired correctly to account for the throttle position circuit differences, it works fine. Marty Marty, thanks for confirming that. I thought I had read a few years ago that newer TB's could be used with older TAC modules by rewiring them, but I wasn't able to find that reference material when I posted to this thread. RacerX11 FEB 03, 04:24 PM quote Originally posted by Darth Fiero: Marty, thanks for confirming that. I thought I had read a few years ago that newer TB's could be used with older TAC modules by rewiring them, but I wasn't able to find that reference material when I posted to this thread. I should clarify that this applies to the 8-pin LS4 TB, which has separate wires for the supply and ground for each position sensor. I don’t believe you can use 6-pin TB without a converter box. Marty