Breather Filter install on 5.2L Magnum 

Go with the tune up and check all those hoses. Run a can of seafoam down the intake and a quart of marvels in a half tank of fresh gas. Just saying, assuming the the compression is good and the plug wires are good.

It’s the box on the passenger side under the hood with the three harnesses . It was a defect in those models

Keep on keeping on.

It’s been a year. What was the problem? Plenum gasket?