stalls in idle on 1997 Dodge Grand Caravan

after replacing crank- cam position sensors , ASD Relay and computer unit. The car runs now as long as I stay on the trottle. But when I let it idle it still dies

Sounds like the idle speed system is not working correctly. What codes are you getting? How are the idle settings and the idle motor?
1 more answer
I had this same problem. After replacing the throttle position sensor and cleaning the throttle body, mine runs great.