timing retarding itself instead of advancing!?!?!?!?
i recently did a motor swap in my 91 f150 i took out a 302 and put a 351w h.o motor in it. it starts ups and idles fine but when giving it gas and watching the degrees with a timing light the engine retards itself instead of advancing the timing. we are completly stumped as to what it may be. there is a edlebrock thottlebodie on it and we thing the throttle positioning sensor is missing. could a throttle positioning sensor be the cause of this? if there is any way you could answer this for me please email me at firstname.lastname@example.org
if your not a member on this forum or other wise please reply to this question. this is my first truck and motor swap so i really need the help.
thank you so much