I recently purchased a 84 2wd auto van with 223k on it. I have driven it about 400 miles so far with very poor MPG, Almost drained the full tank after driving around 200 miles.

First problem I fixed was to replace the t stat and I am hoping that helps. I do have a CEL on that I need to track down, but since its missing the coolant overflow tank, Cat and the PS pump i figured it might be for one of those. But I need to check it anyway.


Is there anything else to look for other than the plugs and wires? Do I need to change the dizzy cap on it also?