Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 10-03-2019, 10:15 AM   #1
ebds2019
Established Member
 
Join Date: Apr 2019
Location: Martinez
Posts: 28
M.O.C. #23940
TST TPMS way off

Hi folks. I have a tst tpms 507 system. I use flow-thru sensors on my 6 dually tires and my 4 Montana tires.

In the past the unit has seemed pretty accurate. Lately itís pretty far off. I first use a compressor with an inflation valve with gauge to top of the tires. Then I use a digital gauge to check them in case the inflation gauge is off.

Then I turn on the tpms and all the tires show 5-8 psi lower, which starts to trigger low pressure alarms. My alarms are set at 20% higher for high pressure alarm, and 10% lower for low pressure alarm.

I donít know why the readings are off. Since two prior gauges are consistent (inflation gauge and digital gauge) I am guessing itís the tpms that is off.

Any help here? Iím pretty confused about this anomaly.
ebds2019 is offline   Reply With Quote
Old 10-03-2019, 01:09 PM   #2
Dave W
Montana Master
 
Dave W's Avatar
 
Join Date: Jul 2014
Location: Upstate NY
Posts: 1,017
M.O.C. #14547
Give TST a call. They were very responsive when I had a problem, even out of warranty: 770-889-9102


https://tsttruck.com/
__________________
Dave W
Traveling with my DW Susan, a couple poodlepups and our 2014 Montana High Country 343RL, being towed by a 6.7 2011 F250 CCLB using a B&W hitch and OEM puck system
Dave W is offline   Reply With Quote
Old 10-03-2019, 02:35 PM   #3
DQDick
Montana Master
 
DQDick's Avatar
 
Join Date: Jun 2011
Location: Wilsey
Posts: 16,836
M.O.C. #11455
I agree, TST is great to work with.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, MorRyde pin box
2017 3500 Dodge Maxi DRW 4X4, Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, etc.
DQDick is offline   Reply With Quote
Old 10-03-2019, 05:36 PM   #4
jfaberna
Montana Master
 
jfaberna's Avatar
 
Join Date: Nov 2013
Location: Willow Spring, NC
Posts: 915
M.O.C. #13909
If you every get an alarm and your pressure is >500 PSI, it's because you have the old firmware and you have a repeater. Usually happens in camp grounds or truck stops where there are lots of repeaters. The firmware upgrade is free, but a new monitor is $99 and it's color and bright.
__________________
Jim & Martha Abernathy
2014 Montana 3402RL Level UP, Sailun S637's, TST 507, Renergy 100W solar
2014 Ram 3500 Laramieģ 4x2 diesel dually crew-cab 3.73 axle, Reese R20
jfaberna is offline   Reply With Quote
Old 10-04-2019, 06:29 AM   #5
Dave W
Montana Master
 
Dave W's Avatar
 
Join Date: Jul 2014
Location: Upstate NY
Posts: 1,017
M.O.C. #14547
Quote:
Originally Posted by jfaberna View Post
If you every get an alarm and your pressure is >500 PSI, it's because you have the old firmware and you have a repeater. Usually happens in camp grounds or truck stops where there are lots of repeaters. The firmware upgrade is free, but a new monitor is $99 and it's color and bright.

Bright is what I need now for myself+age dimming eyes. I too have a repeater though not had any problem beyond ease of seeing the readout on a bright day .... . Oh well $99 bucks wont break the piggy bank
__________________
Dave W
Traveling with my DW Susan, a couple poodlepups and our 2014 Montana High Country 343RL, being towed by a 6.7 2011 F250 CCLB using a B&W hitch and OEM puck system
Dave W is offline   Reply With Quote
Old 10-05-2019, 11:30 PM   #6
DmaxDually
Montana Fan
 
Join Date: Mar 2014
Location: New Port Richey
Posts: 336
M.O.C. #14092
I have the old style flow throughs. I have 7 on my dually and 5 on my RV (I have them on the spares also). My presures are usually off 2-4 Psi depending on the sensor. I have a Dill tire pressure gauge calibration station so I know my gauges are accurate. I talked to TST about it and it says on their website:
The sensors have a 3-4% tolerance for pressure and temperature.
__________________
2012 Silverado 3500HD|4x4|Crew Cab|long bed|Dually
2012 Montana 3750FL
DmaxDually is offline   Reply With Quote
Old 10-16-2019, 07:27 PM   #7
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 608
M.O.C. #18510
I find that the tire pressure monitors read low for about the first 5 minutes of driving, and then come up to speed rapidly and are accurate after that. I too have TST TPMS 507 flow thru system, and this my second set, and has the repeater. I noticed both sets read low for about 5 minutes of driving. I always check the morning of each departure with my physical gauge, in case we picked up a nail and have a slow leak, and do not notice it before taking off. So I know the pressures are fine, and the TPMS is about 4-5 psi lower when I first start rolling.
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 11:34 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×