Rear tire TPMS
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Cross-Country
Joined: Oct 2023
Posts: 58
Likes: 18
Rear tire TPMS
The f350 recommended rear tire inflation is 80psi. My view it’s to much for an empty truck. I set it at 60 and the TPMS don’t like it.
wondef if forscan can change that?
what is the min pressure before TPMS complains?
wondef if forscan can change that?
what is the min pressure before TPMS complains?
Laughing Gas
Joined: Apr 2003
Posts: 790
Likes: 232
Yes, FORSCAN can change this (search on TPMS in FORSCAN thread).
I re-set lower limits to front 50, rear to 60.
I typically run 60-65 front and 70-75 rear towing, so I set my limits based more around that.
Not towing, I'm about 53 front, 63 rear.
Mountain Pass
Joined: Aug 2020
Posts: 200
Likes: 30
From: Spokane, WA
Pre-Forscan change from 60/80 to 40/40 F/R, I could run 50 psi front and 65 rear without throwing the TPMS light. If the light came on, the pressure had to get damn close to OEM setting to shut off. Then I could back down again.
Laughing Gas
Joined: Dec 2021
Posts: 1,091
Likes: 343
From: PG, BC, Canada
On mine 70 Psi is workable before the monitor says that the pressure is too low on the rears, although, last winter the light still came on when the temps went down to -30 and the tire pressure went lower because of that...
Laughing Gas
Joined: Apr 2003
Posts: 790
Likes: 232
(say 70-75, with high pin and/or tongue weight(s)).
So I run higher unloaded rear pressure, so I can keep my TPMS threshold at a higher level on rear, closer to my tow pressure.
I also think that lowering air pressure matters more on the front than rear, for ride quality, especially on CCLB, where rear tires are
a couple miles back there, somewhere
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Tuned
Joined: May 2010
Posts: 495
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From: Pleasanton, CA
Q: Those of you who have lowered your tire pressure do you see a reduction in MPG?
Thanks….
Mike
Thanks….
Mike
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Fleet Mechanic
Joined: May 2018
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No, not at all. It rides smoother unloaded also. I do not see any MPG reduction running 50 psi all around vs. Ford's 'recommended' pressure. Unloaded, 50-55 all around is still plenty of pressure.
Tuned
Joined: May 2010
Posts: 495
Likes: 130
From: Pleasanton, CA
Good to know I think I will lower mine a bit.
On my Fusion hybrid that gets an overall average 40mpg I see a noticeable difference in mileage if I lower the tire pressure even a few psi. Also if I raise to about 42psi from the recommended 35psi I get better mpg so I figured the truck would be similar.
Mike
On my Fusion hybrid that gets an overall average 40mpg I see a noticeable difference in mileage if I lower the tire pressure even a few psi. Also if I raise to about 42psi from the recommended 35psi I get better mpg so I figured the truck would be similar.
Mike
Logistics Pro
Joined: May 2022
Posts: 4,285
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From: Everywhere and nowhere
Good to know I think I will lower mine a bit.
On my Fusion hybrid that gets an overall average 40mpg I see a noticeable difference in mileage if I lower the tire pressure even a few psi. Also if I raise to about 42psi from the recommended 35psi I get better mpg so I figured the truck would be similar.
Mike
On my Fusion hybrid that gets an overall average 40mpg I see a noticeable difference in mileage if I lower the tire pressure even a few psi. Also if I raise to about 42psi from the recommended 35psi I get better mpg so I figured the truck would be similar.
Mike
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