i have changed ecm(1227148),maf,cam sensor,ignition module(10456478),calpack(16036504),3 new coils,atr bulldog chip and wiring per d.a.arieno still no fire.the first im was from buick dealer,missing pin p.#2 im was from napa missing pin p.does wire 439 need ignition power?can i splice it to wire 839 pin m and make it fire?
Have you had a look at:
http://www.gnttype.org/techarea/ecmsensors/8487ecm.html
and:
http://www.gnttype.org/techarea/ignition/module.html
Between these two articles, there is a lot of info that might help.