I am new with this car and it's a used car when I got it.

The car is a V6 Honda Accord 1995 2.7L. <- i don't know what type of engine it is

Problem:
My car starts fine cold (RPM~=1000+), I can drive it for a upto 10-15 minutes. When car comes to a stop- in idle, the car's RPM drops to ~500-700. Wait a little while, then RPM drops more and car shakes and halt. Engine stops, when try to start again, engine <U>cranks</U>, but doesn't start. Press on gas and crank, RPM goes up but still won't start. Wait 20 minutes, then try to start ignition again, then the car starts, ignition goes and car runs again. This happened a few times and everytime I can restart the car again.

Changed the following, but no help:
- spark plugs, changed all 6
- changed air filter
- changed PCV valve

Please help! Please!

 

REPOST!