Graphite600

This evening I was pulling out on the highway on full acceleration and there was a white GMC behind me, so I floored it, and left hime in a cloud of black smoke! YOu should have seen his truck go through that smoke, and his face!!!! man you got to love a cummins

wexman

I have never once had a cloud of black smoke come out of my 600, and I stomp on it hard and often. If that happened, something is wrong with your truck.

Get it looked at.

BigBlue

Unless he's been neglecting his signature for a while.

cquestad

MINE SMOKES!

Smkndzl

Mine will do it also , and it runs great with great mileage, check out the license plates

zulusafari

In Iowa, that guy probably would call the DNR/DOT hotline and report you as a "SMOG producer," then you would get all kinds of suggestions and coupons for service at area repair shops to reduce your polution levels. I see the day coming when the DOT or DNR will actually pay us a visit, with the old tail-sniffer to see what is up with our emissions, based solely on the report of another vehicle driver.

JohnnyH

Mine smokes also. I think most 600's are doing it.

Blue600

Haven't seen any smoke out of mine.

cquestad

Add some fuel...it will smoke!

Mine did not smoke at all stock either. Not one puff.

Lightman

POS 600's. Mine wont make any smoke at startup, or wide open

thames1948

Mine don't smoke, but must be pushing raw fuel out instead.

coolslice

I didn't think mine smoked, but it does puff at times. It's not black, so it's harder to see, it's more of a grey color. I would think if your driving at night and you you stomp it w/ a car behind you and you DON'T see a good deal of smoke in their headlights, then you may have something wrong.

Hoss

Mine smokes since I put the EZ on it....but then I don't have a 600 either. I think a straight through exhaust system lets more smoke escape as well.

bronco351

Mine has no smoke, ever,. Even at the truck pulls!!

Lightman

wide open at night with headlights I get no smoke. My benz is a different story...with the chip in it it smokes like a 2nd gen cummins when you stomp it.