I've got a 5.0 engine ready to go into a 92 F-150 w/ a manual transmission, but I don't know what I'm going to do about tuning the ECM. It's a speed density truck, & I'd like to avoid the cost of going mass air if at possible. I've installed a speed density friendly cam (Comp 31-255-5) & put on Trick Flow Twisted Wedge Street heads & 24 lbm/hr injectors.
My ECM catch code is L2L. I can't find anything about this ECM. I've contacted several companies (Superchips, Jet, Hypertech, SCT, Tweecer, Diablosport) to no avail. Either they can't support that processor or I haven't heard back. Does anyone have any ideas other than mass air conversion? Can I buy another SD ECM, like a DA1, since I know at least Tweecer supports this?

 

A tuner should be able to use a GEN 1 Lightning database (C3P1,2,or3) and just disable the transmission functions for use on a non-electronic or manual transmission and then dial in the fuel and spark from there.

 

Put 19lb injectors on it and run the computer you have, there's no need for 24lb squirters with that cam.