I have a 93 GMC 4.3 throttle body injected truck. Lately, it has been missing at low to mid RPM. It seems the worse between 1200 and 2000 RPM, but is at a loss of power throughout the entire RPM range. It really struggles pulling a hill that used to be no problem. This truck has 180K miles on it and has treated me right, I just want some of my power back. Any ideas what is causing this?
I put a new cap and rotor on recently Plugs are not too old and look good.
I'm not sure how the throttle body injection system works (1 or more injectors, etc.) but it seems that it is a fuel problem.
Thanks in advance.
Michael