08 Sierra Denali , tsp 216/224.600.600 113+5 lsa
long tubes , ported heads .

so in the tuning stages of the truck after getting it back together , I needed new injectors . Upgraded to fic660’s . Fixed the hesitation problems .

now after a data log I seen my fuel pressure drop at wot . It maintains 43.5 all the time till I dump on the throttle . I seen the fuel pressure drop to 32psi at around 5000-5500 Rpms . Afr stays and fluctuates from 12.7-13.0.

truck seems to be running and idleing best it has in a long time . Installing the injectors definitely made the truck happier ..

thanks in advanced for any input .

 

Just add a flex fuel pump.

 

hows fitting one of those into and non flex gas tank? Or should I just buy a whole new tank and flex fuel pump ?

 

I believe there is a thread on here how to convert to flex pump.