Really wierd problem

[6.0powr]

I have a 03 6.0 has custom tunes on sct exhaust and intake truck has been doing fine got in to start this morning and wait to start light stays on longer then normal but injector buzz upon koeo never stop buzzing they will finally quiet down but never stop the truck will start but jump all over the place because of firing the only code I can get is p0148. I figure it's ficm related but everything shows good on volts and all. New wierd problem to me I have never saw thanks for the help