Exhaust Temps

Reply Subscribe

Thread Tools

Search this Thread

Apr 19, 2009 | 03:40 PM

Sarge261

Thread Starter

Logistics Pro

Joined: Feb 2004

Posts: 4,460

Likes: 14

From: The Land Of Time

Exhaust Temps

Well today climing a pretty good grade, unloaded, I saw the highest temps yet. I hit about 1100-1200*. Should this concern me, I have never been above 1000* but never climed this type of grade. I had the cruise on and the truck lost speed and the tranny wasnt shifting down. I gave it a little throttle and it kicked down and the turbo spooled up and the temps settled down to around 800*

The truck is a bear and probably would have lugged its way up the hill without down shifting. So you all know I run Innovatives Street Tune most of the time unless I tow heavy, when I say heavy I mean a car or something, I dont take the tune out to haul some brush to the dump.

I just want to make sure this is ok I am planning a trip to PA, and I will be going from Reading up to Penn State and there are some pretty steep grades out that way.

I am wondering should I put it in Tow/Haul when beggining the climb to keep the revs. up or just let the tranny do its thing. My concern is the loss of speed.

Thanks and sorry for the long post,

Sarge

Apr 19, 2009 | 04:08 PM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 25

From: Middle Tn.

I have done 7% grades for 6 to 7 miles going to the Sierras in August when the temps in Bishop are over 100 and when I get to the 9,000 foot level it is still in the low 80's. This is with 12 to 13k of 5er behind me. The temps will climb pretty good if I don't take over. The tow command will take it out of overdrive but the engine will continue to drive the load in 4th. Once I back off a little and manually pull it down to 3rd and stick around 45 to 50 mph the temps drop drastically in a matter of a minute or 2. The engine is a brute and doesn't know when to quite so you have to change the playing field by letting the gearing do the work and not the engine.

Apr 19, 2009 | 04:25 PM

UGA33

Lead Driver

Joined: Sep 2006

Posts: 5,665

Likes: 164

From: Cartersville, Ga

I hit 1100* yesterday getting on it trying to merge with traffic stock. No need for concern.

Apr 19, 2009 | 04:56 PM

BPofMD

FTE Legend

Joined: Jul 2005

Posts: 65,938

Likes: 1,432

From: Millersville, MD

If you are towing....esp in hilly are, keep it in tow/haul mode.... that's why it's there. This truck/engine/tranny combo. is a brute! It'll take most anything you throw at it - except an OVERBOOST situation - then you'll stretch the head bolts and disaster....

Apr 19, 2009 | 05:56 PM

texans

Postmaster

Joined: Jul 2005

Posts: 3,956

Likes: 6

From: Abilene, Texas

nothing to worry about sarge. I see 1100 or 1200 all the time when Im getting in it real hard.

Apr 19, 2009 | 06:00 PM

69cj

Hotshot

Joined: Jul 2005

Posts: 13,834

Likes: 25

From: Middle Tn.

Just remember, Ford put that 3rd gear manual pull down there for a reason not because they had extra room on the selector dial.

Apr 19, 2009 | 06:01 PM

william_04_x

Lead Driver

Joined: Nov 2007

Posts: 5,139

Likes: 209

keep it in T/H if you have a load behind you..often, i'll coax the transmission to downshift before I get to the bottom of the grade..this keeps my speed up..

1200* is nothing to worry about when towing..i've pulled steady for 10 miles at 1250* in 110* heat..

during long hard pulls, as the motor starts to get heat soaked, you may notice a slight reduction in power..once various fluid temps reach a certain temperature, the PCM will pull some fuel back to protect the engine..