i did a 5.3 too 6.0 swap and put the stock injectors out of the 5.3 in the 6.0. Lastnight i put the 43# in and it runs like **** can't drive do i half to get it tuned right away to run right or is it something else!!!

 

the pcm HAS to be told the new injectors are there. you are dumping fuel.

 

get it tuned right away.
they have to change the ifr tables.

 

why on earth are you using 43s?

 

its supercharged!!!! still lil big but they will work