This is a prime example of what I was saying about TBI in another thread. Two ACDelco TBI injectors and the throttle body rebuild kit cost as much as the upgraded MPFI spider and gasket set for the Vortec motors. TBI may be simpler, but it certainly is not cheaper to fix. Good luck with her!
I'd just as soon have a carb to tell you the truth.
Even after 2 new injectors and a new fuel pump, yes she's running and idling fine...under load, no clue - there are no lines to the back brakes at the moment and I'm going to do discs if I can source the rotors within the next few days.
I'm still not happy with the responsiveness or should I say the lack of responsiveness. When I stomp down on the pedal, I can hear the butterflies opening because of the inrush of air, but the engine RPM is noticeably behind me mashing on the pedal.
If I gradually and nicely press down on the pedal, it's a different story. Let me say, it's the difference between getting a green light and gradually depressing the pedal to get through and hammering the hell out of the pedal to get the truck to launch.
What gives? Is this PURPOSELY GIMPED? To be honest with you, it's this tiny bit of hesitation that makes me hate TBI. It's almost like the computer takes too long to think or the signal from the throttle positioning sensor is sent to the computer via gerbil. Is there anything I can look at or tweak to get this thing more responsive?
EDIT-->I do have a pair of headers on this thing, the air injection smog crap is gone and I put the O2 sensor in the collector because I just couldn't bring myself to drill into the header...is it possible that the O2 sensor is too far away? Could that be causing it? If you don't know my sob story, I have a 476 that I'm going to drop in, but it's probably not going to happen for several months. I have the motor in my garage, need to get a carb for it, would love to invest in a torque convertor at the same time....but for now I really need to just "make due" with what I have in the engine compartment. August 1st youth football kicks off and my wife wants her daily driver/grocery getter back, so this CHEVY needs to be moving. =)