i have a 1998 dodge ram 1500 5.9 we just replaced then plenum plate and gaskets and now on the test going down then road we lose oil pressure and it will not come back up untill you stop or turn engine off we had oil pressure before but hasent been drove in probley 6 months any ideas

 

from my experience sludge is blocking screen until you shut it off thin it falls away

 

Did you removed the distributor? When you did the plenum gaskets. I will move your post to the correct section.