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Old 06-21-2014, 08:16 AM   #1
Join Date: Sep 2012
Location: San Mateo,Fl CPO USN Ret.
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TST TPMS Install

Recently installed tst 510 tpms with 6 sensors on mh 4 sensors on tow. Tire pressures on mh sensors read 5 psi below tire inflation psi, 2 psi below on tow. Check tire inflation psi with 3 tire gauges. Called TST about differences of inflation pressure and sensor pressure. Tech said this was a normal sensor reading and was more accurate because my 3 gauges could be 3_4 psi off. Asked if I should incresetires up 5 psi and he said to go ahead. Now I concerned I may be 5 psi over inflated.

Anyone experience this situation with there tst tpms?

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Old 06-21-2014, 08:27 AM   #2
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Look, tire pressures vary with temps. Use your guage to fill the tires to the pressure you want and then monitor the pressures with the TPMS. What you are looking for are difference in pressures and temps in individual tires which will alert you to problems.

I have several gauges and they all read different pressures on the same tire. Folks are getting entirely too anal about tire pressure.

Jim and Carol Cooper with Oreo the Kitty
2002 Journey DL 36, 3126 Cat 330hp
2015 Ford Explorer Blue Ox tow bar, AF1
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Old 06-21-2014, 08:31 AM   #3
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I have the TST system and have used it for about 7 years. Over the years with different sensors and a few replacements, I have found that there is a variance or tolerence of maybe 2 lbs either way on some sensors. I do not recall that I have had any with as much as 5 lbs off but he is correct in that gauges will vary also. Use a gauge you trust most, set the tire pressure and then install the sensor and see the difference. If you see and know the difference, you should be good to go I would think. This is the procedure I use. Hope this may help. Happy Trails Bert
2006 Monaco Dynasty Diamond IV 42' Tag, ISL 400, Residential Refrig, 10KW Onan, Bosch Washer/220V Dryer (previously 2003 American Tradition 40W)
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Old 06-21-2014, 09:08 AM   #4
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As others have commented, I set my pressures with my good quality Milton gauge. Then monitor with the TST system, not getting concerned over a few PSI one way or the other. Any substantial change from normal will be obvious.
Vince and Susan
2011 Tiffin Phaeton 40QTH (Cummins ISC/Freightliner)
Flat towing a modified 2005 Jeep (Rubicon Wrangler)
Previously a 2002 Fleetwood Pace Arrow 37A and a 1995 Safari Trek 2830.
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Old 06-21-2014, 12:04 PM   #5
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And no.... 5 psi overinflated is not worth worrying about. Heck, most folks here throw an extra 5 lbs in each tire just for the hell of it! There is no downside to 5-10 lbs over.

Underinflate? Yes, heat generation problems can follow. 5-10 lbs underinflated should be adjusted. Well, 10 lbs certainly, but 5 would have me wondering where the air went.
John & Diane, Fulltimers. RVM103 NHSO
On the road since June '12 with Lincoln, the guard cat.
2002 Dutch Star 40, Freightliner, Cat 3126, 2004 Element
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