98 ram 5.2 help needed

DUbob, Thanks for the advice. I will look down thru the throttle body and see if there is oil. I have the air intake cover off. If I pull the plenum I think it would be smart to do a valve job as well? Ive read if you go that far you should replace the lifters. They say that the magnums use a roller system. Do they all 5.2 magnums have rollers or is it after a certain year?

73AbodEE, When you say new gasket were you meaning just a TB gasket or plenum gasket? Did you do a compression test or leak down test? Also when you say reset the computer what did you mean and how did you do it.
Thanks Rod
The throttle body gasket. Any time you unplug anything or make changes you need to reset the computer. I take the negative battery cable off , turn the headlight switch on, turn the ignition switch on like you are trying to start it , then hook the battery back up.
I didn't do a compression test or leak down because it just started acting up a week ago. I drive this truck every day