2019 Max overheating when towing

Dorzak · Aug 5, 2019

When I bought my 2016 a coworker had just bought a 2017 F-150 with the 3.5L Ecoboost. He had similar issues with overheating towing. Dealer said the same thing and eventually he got it lemon lawed and bought a Dodge instead. I suspect some may have issues, that others don’t. He never had an issue commuting with it.

ANGEL TORES · Aug 5, 2019

Sorry to hear about your troubles, I have a few questions about your situation. I own a 2015 XLT with the tow package and I am towing a 7,900lbs Camper and I have gone to Florida Twice from NJ and When we purchased to camper we went to Indiana to buy it. Our camper has over 8K miles with our Expedition. Now to my questions, what is the specific payload for your truck? What is the tongue Weight of your trailer? How much weight did you have in your truck while towing including driver, passengers and cargo if any? I am asking because you may be overloading your truck and I am trying to ***** the conditions before I give my opinion.

cmiles97 · Aug 5, 2019

OP did the Ford service advisor give you what are considered normal towing transmission & radiator fluid temps? See if you can get that in writing from them. If you exceed them while not going over the recommended weight loading. Take a pic or video for a 2nd check out. 2019 Expedition Towing Specs:

https://www.ford.com/cmslibs/conten.../guides/19Towing_Ford_Expedition_r1_Dec21.pdf

shane_th_ee · Aug 8, 2019

Uturn said:
Your XLT will do the same thing, you can have it display the trans temperature constantly above the analog gauge. It is in advanced settings.

Can you add some detail? I tried to find this setting yesterday, but failed.

Bill Schell · Aug 8, 2019

Sounds like the design group was doing a delicate trade-off with cost/weight. These issues, particularly on vehicles designed and advertised for towing, really gets in my craw. There really is no reason overheating should be a problem on these or the F150 trucks when operated within the defined limits - and even those should have a little safety margin.

Uturn · Aug 8, 2019

shane_th_ee said:
Can you add some detail? I tried to find this setting yesterday, but failed.

It turns out I was thinking about Miles To Empty above the fuel gauge. I know that the F150 has the capability to display the temperatures above the gauge and that it might be possible on the Expeditions. The problem is that it has to be programed and the issue has been that Forscan is not capable of programming the IPC. One day I hope to get into Austin and have a friend who can program the IPC. When I do, it is one of the parameters I would like to try. This is the coding for the F150's
Engine temp & Transmission temp shows above gauges (8" Clusters only) IPC 720-07-01 xxxx xE5x xxxx ** use this if you have trailer brake controller and turbos **
IPC 720-07-01 xxxx x65x xxxx ** use this if you don't have trailer brake controller but have turbos **
IPC 720-07-01 xxxx xA5x xxxx ** use this if you have TBC but don't have turbos **
IPC 720-07-01 xxxx x25x xxxx ** use this if you don't have TBC or turbos **

duneslider · Aug 8, 2019

On the F150 once the temp hits a certain threshold the temp will display above the gauge. On the coolant I believe that temp is 230 deg. This is only on the dash that is full digital. The dashes that have physical analog gauges will not show a digital read out above the gauges.

spotdog14 · Aug 9, 2019

I learned with my 2015 F150 with tht 3.5 is that you need to lock out transmission gears to keep the turbos out of boost. Keeping them spooled up drives coolant Temps through the roof when towing.

duneslider · Aug 9, 2019

spotdog14 said:
I learned with my 2015 F150 with tht 3.5 is that you need to lock out transmission gears to keep the turbos out of boost. Keeping them spooled up drives coolant Temps through the roof when towing.

Please explain, I am not sure how the transmission has anything to do with whether you are building boost or not? The spools are turning if the engine is running?

JasonH · Aug 9, 2019

duneslider said:
Please explain, I am not sure how the transmission has anything to do with whether you are building boost or not? The spools are turning if the engine is running?

Boost increases with engine load. Using a numerically lower gear reduces load on the engine, so the turbochargers will not spin as hard. Basically, it is using the gearing to reduce load on the engine, which means less air is needed from the turbochargers.

I haven't had any issues with sustained boost on my 17 Expedition EL while towing my 7K travel trailer. I usually go up moderate grades in 5th. Having said that, most of my towing has been in the gulf region, so the grades are not long ones. I did read someplace that there is potential for cooling issues at high altitudes, due to the thinner air. But I have not experience this myself because I have not towed at altitude.

2019 Max overheating when towing

Dorzak

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cmiles97

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