Cold morning for Houston this AM, about 45 degrees.
She cranked a bit slow, fired and then stalled as usual for this temp.
On second attempt she fired up but idled real slow around 500rpm or less then stalled when I pressed the gas. Then I cranked her until the battery died so I took the wife's car to work.

This afternoon, I put in a good spare battery and cranked her up. She started fine but idled very slow again. I let her idle to full operating temp with no problem other than the low RPM. She rev'd fine but stalled when put in gear. This is an all-of-a-sudden thing.

Fuel pressure is good; air intake is good; spark and timing is solid; no obvious vacuum leaks; pine tree air freshener is new...

Come on fellas. I know you can help me figure this one out!
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