I have a 1990 Dodge ram D-150, seems to have lack in power but The truck starts and drives, and every time i come to a stop the truck dies, starts back up and drives.come to a stop, dies on me again

run the fault codes
indicators are the EVAP system not venting the fuel tank and a vacuum is forming in the tank preventing good fuel flow

Timing! Timing chain? Check both!

Check/clean the MAP sensor and throttle position sensor. This should fix the issue. Its a common problem with Chrysler products.

Look for the fuel pump or fuel filter to cause the problem. The lacking power and the engine dieing after starting is caused from lack of correct fuel pressure. Hope this will help you.

No not at all. Sounds like you may be have a fuel issue. Check the fuel pump and make sure when under load you are getting proper fuel.

more than likely its bad sparkplug cables, same problem on f-150 they are probably shorting out somewhere in them

what year is it?

my ram 50 starts just like any other vehicle, (no light switch pulling whatso ever), it sounds like somebody haas rewired something wrong or you have a loose connection and when you hit a large enough bump it cuts your power. Start it up and find a speed bump somewhere and drive over it enough to give your truck a jolt and see if it dies.

First thing, check your rotor button. Sometimes the tip breaks on them, going to the side and won't allow it to start. If that's ok, check your timing chain. Good luck.

Sorry this is not an easy fix the clutch packs in the transmission are slipping, usually caused by wear, but the hydraulic pump is probably getting week. As the oil warms up the oil gets thinner and the hydraulic pressure decreases. Times for a overhaul of the transmission, and if the torque converter can not be flushed a new torque converter is recommended. You may get lucky buy changing the fluid several times, but if the transmission is 22 years old it may not help.