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Old 03-06-2008, 08:54 AM   #71
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Quote:
Originally Posted by millvalleyca
I checked my owner's guide for my 2008 Ford 250.
In the vehicle symbol glossary I found there is a "Low Tire Pressure Warning" symbol but that's it.....no other info to be found in the guide. Any idea how this works?.....you have a flat tire and the symbol lights up?
I put new tures on my 03 Explorer and the techs told me that is the "valve stem" that contains the sensor.

Last Fall, on the first really cold day I started it up and it illuminated on the dash an alert that the tires were all low. Until then I didn't know I had the feature. I also looked in the owners manual to no avail. I did check the tire pressure and they were all low. It had nothing to do with rotations as the vehicle hadn't moved for a couple days when I turned the key on.
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Old 03-06-2008, 02:19 PM   #72
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I agree the systems on trucks and cars are very different than the Pressure Pro. The Pressure Pro measures actual tire pressure and tells under- or over- pressure and has a audible alarm.

The systems on newer vehicles are a mystery to me and seem to have different sensors depending on manufacturer. On our '06 4Runner it measures the spare too (that's the most worn tire and has been a spare through several tire rotation cycles). Of course it's the spare that loses air faster than the others and the hardest to get to (Murphy's Law). Since the spare isn't rotating unless I roll the 4Runner, Toyota used a different system on that SUV. The dealer's service dep't hates these because they are sensitive and easily damaged when tires are changed—I think they have a sensor on the wheel which actually measures pressure, but I don't know how the signal gets to the dashboard—radio?. Of course, the tech told me it measures rotation and when I suggested the spare doesn't rotate, he admitted he's confused as anyone. Our '07 Tundra doesn't measure the spare, but I have no idea how it works, but it may be different, or maybe Toyota wanted to save a few dollars. The 4Runner system is pretty sensitive. The one on the Tundra has never done anything. Both just have a warning light easy to ignore. A sensor in the valve stem seems difficult to believe—that tech may have been wrong.

I'm hoping in a few years the auto and truck manufacturers figure out a low priced system that does what the Pressure Pro does and then sell low priced additional sensors for trailers. The only reason the Pressure Pro is so expensive is because it's not mass produced. It's worth the price to me because the risk of a flat carries such a high price, but I'd rather pay a lot less.

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Old 03-06-2008, 02:37 PM   #73
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I got this post from a Ford forum when I asked the same question

All 2008 vehicles & up have this tpms system fed. mandate sensors are made on valve stem.8 psi. or more in tire press. will turn on lite & that also includes the spare tire
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Old 03-06-2008, 03:16 PM   #74
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back ground info and other threads with more of the same blah, blah, blah....


http://www.airforums.com/forums/444554-post9.html

http://www.airforums.com/forums/f438...tor-31207.html

http://www.airforums.com/forums/f438...tor-12432.html

http://www.airforums.com/forums/f438...last-8680.html

http://www.airforums.com/forums/f206...tem-24526.html

the newer system from mobile awareness, lewster suggested above looks promising too...

Transportation Safety Products

my preference is for monitoring INSIDE the wheel at the stem...

and keep in mind that SOME of the big vehicle supplied tpms are designed only for use with RUN FLAT tires....

now run flat ST tires for the 'stream would be COOL!

cheers
2air'
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Old 03-17-2008, 08:59 PM   #75
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Run expensive

Quote:
Originally Posted by 2airishuman
now run flat ST tires for the 'stream would be COOL!

cheers
2air'
What I've read about run flat tires is that they don't last long and cost a lot more than regular tires.

Perhaps solid rubber tires will have a comeback.

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Old 03-17-2008, 09:35 PM   #76
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but the technology marches on...

make mine tweel...


imagine for example an airless trailer tire carcass that could be retread...

we'll be using these soon on cars and they are already in use on heavy equipment...

cheers
2air
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Old 03-17-2008, 10:26 PM   #77
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Great info, but a question....

2air etal -

Been eyeing something like this for quite a time as I have one of the loooonnnggg trailers, and in reading the PP and the Doran sites, both mention that 'metal bodied' RV's "might" require a repeater.... any thoughts?

Has anyone else had issues with signals not getting to the monitor because of metal interference???

Looks like the prices have come down a bit from the last time I looked this things over.... still mulling, but the info will likely nudge me along.

Thanks

Axel
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Old 03-17-2008, 11:58 PM   #78
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'toy

competition often brings lower prices (except in the medical world)

these folks seem to being stepping into the rv side previously held by dorian...

Transportation Safety Products

lewster has used this setup, i think.

i'd prefer stem units INSIDE the wheel, but if i were to attach an external valve stem type...

these new guys look promising ...

there data sheet suggest transmittal up to 50 ft? as i recall? and a lower threshold for sensing pressure loss...?

if that's correct a 34 on a long bed truck is pushing those transmittal numbers.

i've not learned anything about repeaters, but an email to tech support at either company might be useful.

cheers
2air'
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Old 03-18-2008, 06:56 AM   #79
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Quote:
Originally Posted by SilverToy
2air etal -

Been eyeing something like this for quite a time as I have one of the loooonnnggg trailers, and in reading the PP and the Doran sites, both mention that 'metal bodied' RV's "might" require a repeater.... any thoughts?

Has anyone else had issues with signals not getting to the monitor because of metal interference???

Looks like the prices have come down a bit from the last time I looked this things over.... still mulling, but the info will likely nudge me along.

Thanks

Axel
SilverToy
Lats year when I used to sell and install the PP system, I did have problems with metal bodied (Prevost) MoHos in getting the signal up to the dash and the receiver. Also, the big fiberglass bodied MoHos (just about everything else) with multiple slides also had problems. The other problem area that needed the echo repeater was length.

When you had a 45' bus towing a 3-axle 35' trailer, it was a real job to get the signal up to the receiver.....sometimes WITH the repeater as well. The Mobile Awareness system is designed to be used with tractor-trailer combinations and has an externally mounted antenna to provide the extra gain to compensate for the additional length.
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Old 03-18-2008, 06:23 PM   #80
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New Pressure Pro

I just received the newest model of the Pressure Pro from Doran. They call it the Doran 360. Perhaps Anderson Cooper is involved.

There are many more options for mounting without an extra charge for them. The suction cup option has three suction cups and seems to provide extra stability compared to one cup. I'm trying it on the windshield. If you want to stick it on a flat empty place on the dashboard, they provided 6 pieces of Velcro with sticky backs, but all of them were for only one side of the Velcro; there should have been three fuzzy ones to match the ones that look like miniature beds of plastic nails.

The monitor is smaller and seems to be better thought out. The sending units on the tires now have locking things. They seem to attach to the valve stem with three really small allen screws, but I'm not sure they should be used on rubber valve stems—which are what came with my '08 Safari. It's also packaged much better than the previous model. Doran told me it was ok to use the sending units on a rubber valve stem for a while, but to replace them fairly soon.

I'll install it this weekend and hope to try it on a one week trip to New Mexico if the weather stays nice.

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Old 03-18-2008, 06:51 PM   #81
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Not Pressure Pro

Quote:
Originally Posted by CrawfordGene
I just received the newest model of the Pressure Pro from Doran. They call it the Doran 360. Perhaps Anderson Cooper is involved.

There are many more options for mounting without an extra charge for them. The suction cup option has three suction cups and seems to provide extra stability compared to one cup. I'm trying it on the windshield. If you want to stick it on a flat empty place on the dashboard, they provided 6 pieces of Velcro with sticky backs, but all of them were for only one side of the Velcro; there should have been three fuzzy ones to match the ones that look like miniature beds of plastic nails.

The monitor is smaller and seems to be better thought out. The sending units on the tires now have locking things. They seem to attach to the valve stem with three really small allen screws, but I'm not sure they should be used on rubber valve stems—which are what came with my '08 Safari. It's also packaged much better than the previous model. Doran told me it was ok to use the sending units on a rubber valve stem for a while, but to replace them fairly soon.

I'll install it this weekend and hope to try it on a one week trip to New Mexico if the weather stays nice.

Gene
Gene

Doran was selling the original Pressure Pro units with their name printed on them....but they were still the Advantage Pressure Pro units.

The are making their own units now......but THEY ARE NO LONGER AFFILIATED WITH THE ORIGINAL PRESSURE PRO.
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Old 03-19-2008, 11:31 AM   #82
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Quote:
Originally Posted by lewster
Gene

Doran was selling the original Pressure Pro units with their name printed on them....but they were still the Advantage Pressure Pro units.

The are making their own units now......but THEY ARE NO LONGER AFFILIATED WITH THE ORIGINAL PRESSURE PRO.
Oh, I get it now; I thought they were just printing their name on the new ones as well and providing the improved packaging. Well, Doran's unit looks better to me. I'll find out next week how well they work.

I checked the link to TPMS in 2air's post and it goes to a page for the "TPMS 10" for $800 and 10 wheels. It seems TPMS may be a brand name as well as stand for "tire pressure monitoring system". The TPMS 10 can be ordered as the TPMS 6, but still too many wheels for the trailer alone. The nice thing about the TPMS units are that you don't have to remove the sensors to add or subtract air from the tire. For around $200 more than the Doran system for 4 tires (a guess), I can remove the sensors even though I won't be happy when I do it.

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Old 03-19-2008, 01:57 PM   #83
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Quote:
Originally Posted by CrawfordGene
... goes to a page for the "TPMS 10" for $800 and 10 wheels...
that's because my rig has 10 wheels (truck and trailer)

and IF i were considering a system like these, the truck tires would be included.

while a a blowout on the traiiler in any one tire (of 6) might tear up the wheel well and skin or brake lines...

a low tire pressure 'event' on the truck (towing or not) could be a more unsettling experience.

cheers
2air'
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Old 03-19-2008, 02:23 PM   #84
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I would think, if I had enough knowledge to "think", that a trailer tire air event would be worse than one on the TV. My Toyota has a warning light for the truck tires, though no alarm. I'm relying on that for the truck. If the rear TV tires blow out, perhaps it wouldn't matter—like that picture of a '70's Toronado without rear wheels towing an A/S. I could always get more sensors (another $200), but first I'd like to see the stock market go up for several months.

I can't wait for the tweel. Then I can make an altimeter out of the Doran 360. Set it for 14.7 psi and when I get too high or go to Death Valley, the alarm will go off. Perhaps it could be used for a flatulence warning.

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