hi all
iv'e got a friend that runs a campground in colorado and has a bad black smoke problem. we put a new edge ez on his 99 cummins a few months ago here in south ms. and it had no smoke at all. when he went back up to col. it started smoking bad. he said it runs great and the fuel milage is still up. someone up there told him its because of the altitude. does this sound reasonable or is there somthing wrong here? i told him i would check with you all and get back to him.
thanks, dave.

 

Higher altitude = Less oxygen to burn the additional fuel the EZ provides, hence the black smoke.

 

You would think that would be true, but with turbocharged engines I don't know if it works that way.

 

Yes, it does still work that way. The turbo cant replace oxygen thats not there in the first place. Turbocharged engines fair better at altitude than naturally aspirated engines, but the power is still down and you are not able to burn as much fuel due to the lack of oxygen.



KP

 

Then the trouble must be with the EZ as stock trucks don't smoke up here any more than anywhere else.

 

I recently came back from a trip out West towing about 10m lbs. , I noticed a difference in the smoke level at the higher altitudes to the point where I adjusted the AFC cover back to improve it , didn't want black stain on the trailer.
Trucks in your area are likely setting up for less smoke , however you do that on 24valves.

 

kinda goes without saying... the EZ adds fuel above stock levels so you're going to get smoke.

 

thanks for the replies fellas, he's going to call on sunday so i'll pass on the info. i told him if it still ran alright i would'nt be too concerned. he says when he's up to speed it has no smoke. its just when he's taking off through the gears.
thanks again, dave.

 

What I meant was, I'm sure that there is more than one person running an EZ box up this way, there might be a fault in the EZ.

 

Wrong reasoning.

Stock trucks run quite lean. Up at altitude, they end up running richer, but this does NOT mean they cross the threshold of smoking!

For example, if smoke starts at 20:1, and your truck is running 30:1 at low levels, high elevation might change it to 25:1 or so. Richer, yes, but maybe not enough to smoke.

However, the EZ brings in fuel MUCH earlier. Meaning that before boost, the truck might be at 21:1 or so-- VERY close to the smoke threshold. Getting a little too happy with the pedal will make it rich enough to smoke.

As always, the best smoke control is that skinny pedal under your right foot.

Watch your logic to avoid faulty conclusions!!

jlh

 

my truck smoked like CRAZY up at the cabin (9,000ft) compared to at home (300ft)

altitude makes a huge difference...

Forrest

 

the EZ can be adjusted to bring fuel on at a higher boost effectively reducing smoke but not affecting ultimate horsepower. I ran the EZ for 6 months before putting on my injectors and could easily control smoke by the position of my right foot. After the injectors it's the same story.... moral of the story, smoke is controlled by the go fast pedal....

 

I ran a round trip from Ohio to Oregon to Arizona back to Ohio. Even with the PM3 set at 3 I puffed a little smoke at altitude. As soon as I got home here to Ohio (765' above sea level) the smoke went away on the lower settings. It'll still puff pretty good at 7 and above though.

 

Perfectly logical...as many have said!

Higher Altitude = thinner air = less oxygen = more unburned fuel = potential for more smoke!

The other senario for less oxygen and more smoke is a hot summer day. I find it much harder to control smoke, around town, when temps get over 90*.

RJ

 

i expierience the same thing Forrest does,i make 2-3 trips a year to colorado and when i get there she smokes alot more than at home, the truck did this when it was stock as well as when modified...