The miracle has happened.
Today, my stubborn independant mechanic said: ''Let,s get our of here when the problem is fixed. Not a minute before that'' It was 8:00AM.
First: Let's try a new fuel accumulator: No result.
Let's try a new fuel pressure regulator: No result.
Let's try a new start injector. with a new temp. sensor. No result.
let's check this, and that, and maybe this. Let's do this test, and that one. No time for lunch. It's 1:00o'clock and the d*** thing is still not operating properly.
And finally::::::::::::::::::
Jiglling with the wiring harness with the ignition switch on, we heard the sound of sparks.
Open-up the wiring harness and voila:;;;; 3 contacts were very loose at a connector, making intermittent bad/no contact., leading to the temp. sensor.
A good clean-up of the contacts, little soldering, heavy tape wrapping over the new tight connections and the baby fired right up by only showing it the key.
We let it cool down a few hours (over a beer or two), and fired the baby again. The engine fired without turning more than 1/10 revolution. Shut it down, start a again. and again, and again.....
It now starts like a Honda does.
And the low idle problem is solved.
Gillybenztech: I like your abrasiveness. Keep it up.
Thanks you all for your help and recommendations
Like GillybenzTech said: parts replacers will never replace a good mechanic.
I left the shop at 7:00PM (11 hours work), and was only charged for 6 hours labour. All new parts (Non-necessary)were removed from the car and the old non-defective ones put back.
I think I'll wake up at 3:00 in the morning just to try it again.
JackD