I am having an intermittent problem with my 2000 Mazda 626 that is driving me crazy. The problem happens after the car is warm. If I turn off the car for a minute or longer (afterthe engine is warm) it will start and then die immediately. The idle will be very rough. This problem can occur when I drive my car short or longer distances.
Occassionally when I start my car a puff of black smoke comes out of the tail pipe.

I have had my car towed to my mechanic's shop twice when my car has failed to start (after driving it for a short period of time).The first time, my mechanic was able to startmy Mazdaafter it sat overnight.

My mechanic has tried to pull the codes on my mazda, but has been unsuccessful, since there are no codes and the car shows all systems okay.

I need some advice on this problem?

 

Check your post in the 626 section. I removed your post from the New Member Area as that is more for introductions and not likely to get any responces from there.