I've been studying the forums, HTKYSA, and a factory manual to learn as much as I can about my Hitachi and the associated emissions systems. I may have given myself information overload. I have a simple question to check my newly obtained knowledge.
My situation: 83 GL wagon, 4wd, may or may not be a California model. The O2 sensor is gone (port plugged). The emissions/vacuum system has been modified by a po. I can't find an ECM. It has either been removed or I simply can't find it.
My question: From what I have read here and in the manuals, my hitachi will run rich if it is not receiving feedback from the o2/ECM?
I read someplace that the hitachis are jetted rich and the ECM leans out the mixture to suit conditions. The car runs rich. Am I correct in my thinking?
The caveat: Compiling parts for a weber swap in a couple weeks.