[TennesseeZ]

Originally Posted by badass66ss

First off I want thank all of the folks who contribute to this forum as there is a wealth of knowledge here. Although this is the first time I am posting as I just finally created a login, I have been browsing the forums for the past 4 years. I especially want to thank ChevyTech as he has inadvertantly answered many of my questions while helping others. Now, my problem child. I recently bought a new (old) 91 c1500, 350, TBI, automatic. The truck has had a stutter on acceleration since day one. Once the truck warms up, when accelerating, it acts like air is retarded. What I have done: plugs, wires, cap, rotor, distributor, CTS, MAP, new injectors, coil, new ECM, new federal PROM, fuel filter, timing control module, and knock sensor. We bypassed fuel filter to check fuel pressure and I get a steady 12 psi during idle and acceleration. I checked all ground straps and all are secure and the wiring is not damaged. My uncle is a retired mechanic of 45 years and he is stumped as to what could be causing this. Also, when unplugging O2 sensor or other components, I do not receive a cel. PLEASE HELP.
Posted via Mobile Device

Please explain the benifit of bypassing the filter, it seems to me you'd want to know the pressure that the TBI sees with the filter in line, as that's the way the engine normally operates? Subscribing to your thread, as I have 2 vehicles that do the same thing, and I've already tried everything I know.