This 25th TA only has 22K mi on it. It started to cut out and die a few
months ago, and has been unreliable since. I extracted the trouble codes.
There were a few odballs that didn't come back after resetting, but DTC 36
came back. I followed the diagnostics in the factory manuals and concluded
that the hi res sensor inside the distributor was bad. I replaced it and
now it idles a little rough all the time and gets worse as it warms up, to
the point where it quits. There are no trouble codes in the t computer, but
it is running open loop. What causes the computer to switch between open
loop and closed loop? What else should I check?