i have a 1996 f250 over 8500grv came with banked port fuel injection/speed destiny and e40d trans
i just replaced my motor came with a 351w roller cam replaced with a rebuilt 351w flat tappet cam.
also replaced/installed the following:
all hoses including vacum
i also removed the air pump/egr vavle.
no emmsions were i live.
my problem is i have a rough idle /new motor now has 600miles onit/
but it runs good other then the idle
would a mass air conversion help fix this problem??