Then how come I get 15 mpg and the only code is the charcoil filter code. Next time i open the hood ill take that off again and take a pic.

 

I'm just thinking if you had blow by that bad, the thing would be smoking like hell too. Besides it says Dodge Ram on the side right?, the plenum is blown! LOL

 

But it gets 15mpg and it doesnt smoke.
The only thing is you have to give it a little gas sometime in the mornings because it sounds like its going to die its like 650 rpm. But i can give it gas and leave it and it will idel for days with out problems. (not literatly but still) It only does that sometimes. So i dont belive it has a blown plenum. What you think?

 

mine gets 15 mpg on a real good day and my plenum is blown and my cat is going bad

don't rely on good (sorta) fuel mileage
if it's never been replaced with a Huges or APS kit, its bad

 

Yea with a 5.2L I got a 5.9L Well today i will get a mirror if i can to look around. Where is a major give away with the plenum?

 

the mileage difference betwen the 318 and 360 is not much different if at all, my cousin had a second gen 2500 with the 360 and got the same as i did

just look for oil pooling in the plenum, not to hard

 

3.9, 5.2, and 5.9 are all Magnum motors, ALL magnum motors have the plenum gasket issue.

put a piece of rubber between aluminum, and a stamped steel plate, then subject those to heat upwards of 300* then tell me how long that rubber gasket lasts.

if it hasnt been done and you own a magnum motor, you need to fix it. REGARDLESS of mileage.

 

+1, I couldn't have said it better. (and I proved it) LOL

 

it never ceases to amaze me how some people just dont understand. maybe its just me, because of my mechanical abilities, but still.

 

I understand but I can't do the job my self with out half of the forum trying to kill me..