Thanks Max,
when the car starts first thing before I go to work it goes to about 900 rpm, NEVER above 1000 rpm. If I sit in the car waiting for it to warm up it will sometimes stall. It will immediately start back but sometimes I have to hold the throttle or it will stall back.
I went ahead this morning and lightly hit all relays and the computer while the car was at idle and that didn't produce a stall.
Let me repeat an observation: When I push on the throttle (give more gas) while the car is in idle it will backfire.
Oh, the temp sensor wouldn't be the problem because my old one and the new one never cured the stall (statistically speaking).