A dirty throttle body can cause a low idle condition resulting in a stalling condition.
Car problem reports
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Most reported 1990 Dodge Dynasty problems
Hard starting or rough idle after the vehicle is parked for a period of time may be caused by leaking fuel injectors.
Abnormal fuel pump noise may be noted.There is a revised fuel pump, wiring harness, fuel tank insulators, fuel tank straps, and fuel tank available depending on the vehicle.
Low fuel pressure may be caused by a faulty fuel pump check valve.
A broken rear torsion bar can cause an abnormal noise over bumps. The torsion bar is part of the rear trailing arm, which must be replaced to correct this issue.
The AC/heater (HVAC) system may unexpectedly switch to the defrost mode when accelerating. This system is operated by engine vacuum and should be inspected for any vacuum leaks if this problem develops. There is also a revised vacuum check valve available to address this concern.