[mustangdaren]

I am running a base timing of 13 degrees and use a btm for hot days but on a cool day I can run the btm with 0 retard with 6psi.(41psi fuel pressure with 42lb injectors, no fmu) I have never heard anyone turn the base down as low as 6 degrees. I figure your timing is your problem but you should also adjust your throttle body idle screw and set the TPS.