I have a 1990 Acura Integra with the 1.8. This car has been very dependable throughout its 195,000 miles, but in the past year has developed a vexing problem. Sometimes, only when it is hot, it will start normally, then idle down too low and die. It will then not restart for at least 10 minutes. (No pop or anything when you crank.) If you wait 10 minutes, or 15 or 20, it eventually will restart and idle fine.

What I have looked for: vacuum leaks (found none), any error codes on black box (none indicating).
What I have done in last six months: tuneup (plugs, filters, etc., including new fuel filter), new alternator.

I should also say that the battery in the car is about 4-5 years old, but still spins the engine just fine on the coldest mornings. Have not had it load tested but plan to do that soon.

Any ideas what this starting problem might be. I've learned to live with it, but my 17-year-old daughter will get this car this year and I need to take care of the starting problem before then.