I have a 1995 dodge ram 1500 5.9l v8 and when I get on the gas it starts shooting out black smoke which is oil. Also after its been sitting over night and I start it up in the morning it smokes until warmed up. I've done research and it could either be the valve seals or the pistons blowing oil by? Plenum is replaced! Please help!

 

Black smoke is running rich. Plug in with a scanner, and see if the temp the PCM thinks the engine is, agrees with what the gauge in the dash has to say.

 

Oil is usually blue smoke, black smoke usually means rich fuel mixture. Could be ECT .

 

Lol!!!

 

Great minds think alike.

 

It's actually blue. Could this be the valve seals?

 

blue smoke is oil obviously, but its a matter of where its coming in. could most likely be coming in due to a blown plenum gasket,m which u could see if you look down into the intake manifold thru the throttle body. but i have also seen oil leak into the exhaust down from the valve covers before. but id check the plenum first.

 

Plenum has been fixed.

Next logical step would be valve seals, or, simply replacing the heads....

 

i think id would do a compression and leak down test and try to find which valve is lettin it blow by so you can narrow it down, then pull that head, and get some grinding compound and re-seat the valve. and try it again.