Sorry for the late replay all. Retesting I did track down the Check
Engine Light problem to a stuck TPS at full travel, but would only
come on until about 30 minutes of running and throw a code 21 for TPS
There is a 180 deg lower temp thermostat in the car, which may cause
the long time to throw the code by staying Open Loop. Standard is 195
deg, although 180 was listed as alternate. " ECM come on warm" -
What I meant to say was the CEL will only come on when the engine is
warm to operating temp after 30 minutes. I need to retest the O2
sensor since I was probably running rich with the TPS at full travel.
With the TPS fixed there is now a rough idle and some hesitation.
Maybe this indicates a lean condition since the TPS enriched the
mixture. Maybe the lean out is caused by vacuum leak? Any other