Extremely strong Exhaust Smell

Cpstanley · Dec 13, 2015

I recently ******d my 2015 6.7 and blocked off the EGR. IT IS TUNED WITH SCT X4 and runs great.

However.......the potency of the exhaust is nauseating. When idling or at first start it stinks in the cab. Also, after warm and if I stop to drop off kids, as soon as the door opens it is potent.

Is this common or I have I done something wrong? My upgrades are in my Sig.

theplumber · Dec 13, 2015

Nope ! Only the good smell of diesel

ramonpowerstroker · Dec 13, 2015

Something ain't right

ramonpowerstroker · Dec 13, 2015

Some exhaust smell is normal but not where it's burning your eyes

Six_Sloww · Dec 13, 2015

At full operating temp you really shouldn't be smelling much at all, these trucks burn really clean even with no emissions equipment.

jcain · Dec 13, 2015

Check your block off plates for signs of a leak. Check your ****** pipe or whatever exhaust you bolted up for a leak

jwanck11 · Dec 13, 2015

what tune are you running?

Mine smells too, but it should not be overbearing.

Mikeyfitz · Dec 13, 2015

Mine will stink at initial startup, but even then it doesn't really stink. So something ain't right. Check your block off plates

dsberman94 · Dec 13, 2015

Check under the hood. At first start when the air kicks on it'll blow all that awesomely smelly air into the cab that's been trapped in the vents all night.

Cpstanley · Dec 13, 2015

jwanck11 said:
what tune are you running?

Mine smells too, but it should not be overbearing.

They are from No Limit. Not sure what they are.

Cpstanley · Dec 13, 2015

Mikeyfitz said:
Mine will stink at initial startup, but even then it doesn't really stink. So something ain't right. Check your block off plates

Block off plates aren't leaking. Is there anything else on or around them I should be looking for?

6.0 Tech · Dec 13, 2015

What about your down pipe, or ebp tube?

Cpstanley · Dec 13, 2015

6.0 Tech said:
What about your down pipe, or ebp tube?

Downpipe doesn't look to be leaking and no idea what ebp is. Where is it so can check?

dsberman94 · Dec 13, 2015

Exhaust back pressure

Cpstanley · Dec 13, 2015

Wherei is the tube so I can check?

jcain · Dec 13, 2015

Cpstanley said:
Wherei is the tube so I can check?

At the mid-back of the passenger side exhaust manifold

Notneb · Dec 13, 2015

It's the block off plate that goes over the port in your passenger-side exhaust manifold. When you start it up in the morning, pop the hood, and hold your hand next to the block off plate, you should feel the exhaust coming out. Either tighten it down more, or contact Mike and see if he will swap you a new plate. A few of the plates for some reason, are just 1/16th of an inch off on the '15's, I ran into the same problem.

If it's not that it has to be the down pipe, sometimes you don't get it lined up right so it leaks on the bottom. Since you replaced your down pipe, it could very well be that.

Mechcont · Dec 13, 2015

Are you running PIP tunes? if you are make sure you load the 15-16 tune first.

Cpstanley · Dec 14, 2015

Notneb said:
It's the block off plate that goes over the port in your passenger-side exhaust manifold. When you start it up in the morning, pop the hood, and hold your hand next to the block off plate, you should feel the exhaust coming out. Either tighten it down more, or contact Mike and see if he will swap you a new plate. A few of the plates for some reason, are just 1/16th of an inch off on the '15's, I ran into the same problem.

If it's not that it has to be the down pipe, sometimes you don't get it lined up right so it leaks on the bottom. Since you replaced your down pipe, it could very well be that.

Thanks for the info. I will check today and let you know what I find.

Cpstanley · Dec 14, 2015

Notneb said:
It's the block off plate that goes over the port in your passenger-side exhaust manifold. When you start it up in the morning, pop the hood, and hold your hand next to the block off plate, you should feel the exhaust coming out. Either tighten it down more, or contact Mike and see if he will swap you a new plate. A few of the plates for some reason, are just 1/16th of an inch off on the '15's, I ran into the same problem.

If it's not that it has to be the down pipe, sometimes you don't get it lined up right so it leaks on the bottom. Since you replaced your down pipe, it could very well be that.

Did you have that crazy strong exhaust smell?