As for the plenum, I didn't realize it was a 2 piece item. My truck has a very slight stumble in the idle, which after using good gas since I bought it, has gotten better. Even at that you can hardly notice it now, and it is fairly uncommon. Sometimes I have to look down at the tack when coming to a stop sign, it is so quiet, I am not sure if it is still running. So, I am guessing I don't have a plenum issue. Is there a kit available to replace all the vacuum lines to factory? Or just have to piece it all together.
Used to be, you could spray a slight mist of carb cleaner and find vacuum hose leaks, or intake gasket leaks, don't know if that would work with computer vehicles or not.....
