dcfluid

The Okanogan area of BC is very hot and summer temps regularly go over 100f. My trip was in the mid 90's.

djmbs

Mike.. C'mon.....Cold Canada huh.... You obviously have never been up here in the summer.... Daylight till after 10 Pm.. long hot humid days... we've had it here above +35C for weeks straight... humidity in the 90% ranges... PUHLEESE...

I bet even most nights in the summer up here are warmer than in AZ... I've been in the desert at nite... BRRrrrrrr DAYUMmmmmmm

dcfluid

^^^^

Uncle Dave

Id take that bet in the summer. Right now tonight Okanogen shows 52 and Havasu 86.

Yeah the dessert at night in winter gets cold very cold.
In the summer it hardly drops at all from the daytime maybe a degree or 2 from 115 to 113- for months.

I had a house in Parker Arizona for 10 years- I've seen trees chasing dogs out there.

Uncle Dave

Ttrot

^Must have been the peyote in the desert to cause that kind of trip!

But in all seriousness, ambient temperature plays a big part in this, otherwise it's apples to oranges. I'm sure in the OP's case it is some kind of issue with the truck itself, at least I would hope.

dcfluid

Temps and road types play a huge role in your cooling while towing, we all know that. Of coarse engine and transmission temps will rise when conditions get tough but can your truck deal with it and stay within safe limits ? My ecoboost does very well controlling and getting rid of the heat.
I've seen more temperature rise out of my HD's and turbo diesels hauling far less a % of their max capacity. Even PUT.C's hurt locker recorded it's temperature increases in it's hurt locker comparison which were significant but easily dealt with.
I think the OP needs further investigation before people judge the Ecoboost as undercooled.
Mine has 14000 kms now and 5300 km towing and compared to my other trucks it has performed admirably. (Cooling)

msgtord

I am sure that when this is all sorted out, the conclusion will be a bad sensor, or just the programming with the ecm. The cooling system on these trucks is outstanding. Even the OP's report that when he let off the throttle the engine quickly cooled, shows that the cooling system is fine.

Really?

MM3.9GT3

Turbos produce a lot of heat, and that heat gets transferred to the intake air. Intercoolers cool the intake air by removing some of the heat produced by the turbos. Under cool conditions, the IAT (intake air temperature) will be close to the ambient temperature.

The problem is that when ambient temperatures are high (90F +), and the turbos are operating close to maximum capacity (towing uphill), the intercoolers can only do so much, and the IAT's start climbing very quickly (higher than the ambient temperature by as much as 40F to 50F). This in turn causes the engine to heat up, and the ECU reduces power output to preserve the engine.

Getting a new tune (chipping) and increasing turbo boost is a bad idea in a car, and a horrible idea in a truck, due to the high load conditions imposed on most trucks (Urban Cowboys excluded). If you are going to increase turbo boost, you need to get intercoolers with higher cooling capacity compared to stock intercoolers.

Uncle Dave

http://www.precisionturbo.net/heat-exchangers/

Seems to me the eco could stand an aftermarket upgrade on the air to air intercooler.

Something like this would likely be productive.


Uncle Dave

Shelby-GT-500

I have a flight computer installed and am going on a trip next weekend. I hope the weather stays hot. The dew point has dropped but we are still over 100. I will try to video the temp gauge as I am driving. Not sure if it will happen with cooler temps and a lower dew point. But we will see!