Originally Posted by Keeseter CO

I monitor my 6.7 off of the DPF sensor. Towing 10k up a 4% the truck went into regen. Once the temps in the DPF exceeded 1250, the truck went into limp mode (no boost). Shut it off, restarted and the truck was just fine.

The Excursion, while I never tow with it, driving up the Eisenhower approach near the top in the summertime (75 degrees ambient, variable humidity) the truck will touch 1200, but not before the fan clutches in and it calms down.

IMO, the 6.7 in stock mode is not happy when towing and regen'ing at the same time....it was at that time I started seriously considering a delete. My buddy in the deleted Cummins following me wouldn't shut up about it for days.

Originally Posted by senix

Something wrong with yours. I can run the tunnel full throttle pulling 16K at 55 mph with oil temps hitting 248 and no loss of power. Clutch fan comes on but no loss of boost or power.


Same going up Monarch.

Originally Posted by jethrodean

I have a s&b dry intake. I think my new probe is junk or my truck isnt getting enough air. Think I might put the stock air box back in to see if the egt's drop. Its crazy to me that pulling a 1800 pound trailer would get my truck up to 1000 degrees. My 6.0 never got that hot pulling empty. Any of u guys that are deleted have u seen numbers that high pulling so little.

Originally Posted by Sterling6.7

Yup. I can get to 1400°+ on the GH tune or about 1200° on the Tyrant tune. That's empty, foot on the floor, passing cars at 80 and gaining, going up hill. Or so I have heard.

Originally Posted by jethrodean

Thinking I might have a bad probe. Left the store earlier and the egt degrees was stuck at 32. Unplugged the livewire and she started working again.

Originally Posted by Keeseter CO

Well, it was during a regen that it did it. If I remember correctly, you have nothing to regen. ;-)

What programmer are you running and what do you have your water temp, EGT and oil defuel settings at? The second time this happened, the H&S defueled the truck because of the water temp breaking the threshold in the programmer, not because of the Ford programming.

Originally Posted by tpalmer007

Jethro- Had the same problem over the weekend using my H&S Mini Maxx. Pulled the spare probe out of my DPF sitting in the shed and installed under the hood. Everything works fine now.

Originally Posted by jethrodean

I thought about doing that too. But how did u get the dpf probe to fit the in where the metal prongs go on the egt box thing. Or did u hook it into the factory plug one that is disconnected during the egr removal?

Originally Posted by tpalmer007

I hooked up to the factory plug that's disconnected with the EGR. It's "pyro 1" in the Mini Maxx menu options. I'm not sure how it works with your tuner.

Originally Posted by BOHAWG175

If the Turbo is not forcing air into the engine the engine is sucking air which causes a vaccuum. A negative reading on a boost gauge is basically telling you how much vaccuum your engine is pulling. Mine does it as well.