87 sub 350 tbi

hi need some help i have a 87 sub 3/4 2wd brand new 350.falling on its face when giving it gas. new holley 670 tbi al new sencers new proform dist,new fuel pump,filter,msd coil,dont know what esle to do to make stop, i hooked my trailer to it to haul car got even worse. any help would be nice thanks Dan87

i tried a holley TBI on my 92 K1500 pickup...never could get it right, as you know there are no real adjustments on these things... my advice would be go back to the GM TBI unit. THe holley people were no help at all.

I've not seen anyone who runs one? Mine would idle good, and wide open throttle was good... anywhere else sucked. I sent the holley unit back and bought two new injectors for my GM TBI unit. (expensive) but worth it, if you want to keep TBI.

did the holley unit ever work right? or is it just now screwing up?

thanks for the fast reply its works ok just sometimes it does this yesterday i avd the tine 2 degres and adj the reglator it was acting like it was running out of gas, here i found i was getting to much runs better today hopefuly stays that way thanks Dan