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Non-contacting Etm


mastertech

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Well here you have it.click here A brand new ETM design featuring Digital Angle Sensor. Volvo says there is nothing wrong with their Italian design. Aftermarket loves it. Don says "go channel 7" But we say hey it's Christmas let's share the good news. So we have listed our design on e-bay to create an awareness. Now what do you want us to do? XeMODeX Inc.

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Well here you have it.click here A brand new ETM design featuring Digital Angle Sensor. Volvo says there is nothing wrong with their Italian design. Aftermarket loves it. Don says "go channel 7" But we say hey it's Christmas let's share the good news. So we have listed our design on e-bay to create an awareness. Now what do you want us to do? XeMODeX Inc.

I saw your listing on eBay: http://cgi.ebay.com/ebaymotors/Non-Contact...%3A1|240%3A1318 and sent you an email. I have also emailed Don Willson. I am very curious if this is going to solve the ETM problem once and for all. From what I understand, you send in your defective ETM and you guys rebuild it so there is no software download from Volvo...am I understanding things right?

MIJ

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Kind of expensive! Especially considering getting an ABS module rebuilt is only 100 bucks!

Be patient young grasshopper. To do the dealer's ETM (out of warranty) is $900 or so.

If this works and catches on, I'm thinking prices are going to plummet just like they did for the ABS.

Also, there's at least one big difference between ABS and ETM:

W/ ABS out, you can still drive your car...with ETM out, you can't.

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We have contacted one of the largest aftermarket distributors in the world with this product. Sure enough they were very interested in it. But our intentions are to present this directly to Volvo and get their attention. Unfortunately they do not respond to any of our e-mails. Don Willson got it right, if Volvo talks to us it will equal to admitting that there is a problem with the original design. The reason why we made our innovation public is that we are hoping that Volvo will cut thru some of it’s red tape and at least listen.

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yes, you do still have to pay for the dealers download, not to mention paying somebody to bring the car to the dealer after you install the ETM, because your car will not be driveable with a new ETM installed without dealer software downloaded. I looked at this option and I was quoted around $850 to do this.(Mine was under warrenty so I did not have to pay.)

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I cannot edit and I wanted to say that I wasn't quoted $850 to do it, I said it wrong thinking somthing else while I typed. Anyhow, I figured that $850 is what It would cost me with an ETM ordered from online, a tow to the dealer and then the dealer software download.

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While I love the idea of correcting Volvo's obvious design flaw with the ETM, the issue I have with this offering is their warranty. Creating a robust and reliable piece of equipment for this type of application is no small task. Anything supposed to last for millions of cycles in a hot, vibrating environment takes some serious engineering skill. While I'm sure the design works fine, I wonder how rigorous their MTBF testing was if they're only willing to back the device for 12 months.

Here's my reasoning. While Volvo's flawed ETM design will always fail, at least we know how it will fail. We also know that we can get 70K-100K out of them with the 155 software upgrade. That means replacement every 5-7 years, depending on your driving. This new design is totally unknown. It could potentially prove to be extremely reliable, and last 200K. Or it could be plagued by issues 14 months into use. At this point, I'm willing to stick with the 5-7 year span of the old one until these new ones have proved themselves in cars for several years, or they decide to lower their price to something less than an OEM replacement, or if they decide to back the product for more than a year.

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Here's my reasoning. While Volvo's flawed ETM design will always fail, at least we know how it will fail. We also know that we can get 70K-100K out of them with the 155 software upgrade.

Interestingly, I have a 2001 Magneti Marelli ETM on my V70. It is the original unit. The car also has the original un-modified software. It has done 258,000 miles without any ETM related issue. :o :o :o

I've been patiently awaiting it's demise for some time now. I can only assume that the Magneti Marelli track wear issue is not universal. If it was then surely mine would be dead. My car has been a commercial vehicle from day 1 and has been subject to what is probably the most severe sort of driving for most of it's life.

Here it is on the right getting a clean during an engine swap. The unit on the left is a Bosch unit from the donor engine.

DSCF1351.jpg

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Erratic and varied commercial driving is probably what's kept your ETM alive.

The folks who drive consistently at the same speeds (I.E.: cruise control on the interstate, etc.) are the ones who have/are replacing their ETM's...the design of the mylar potentiometer lends itself by design to wear out with consistently similar or same type of or speed of driving.

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Erratic and varied commercial driving is probably what's kept your ETM alive.

The folks who drive consistently at the same speeds (I.E.: cruise control on the interstate, etc.) are the ones who have/are replacing their ETM's...the design of the mylar potentiometer lends itself by design to wear out with consistently similar or same type of or speed of driving.

so the owners that do not drive erratically get tortured with limp dick, uhh mean limp home mode ;)

all this ETM crap reminds me of the days when my honda radio would be all scratchy when the volume was turned to and from the on and off position.

right before it went click for off it'll get scratchy. in the upper volume limits its always fine.

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Erratic and varied commercial driving is probably what's kept your ETM alive.

The folks who drive consistently at the same speeds (I.E.: cruise control on the interstate, etc.) are the ones who have/are replacing their ETM's...the design of the mylar potentiometer lends itself by design to wear out with consistently similar or same type of or speed of driving.

I think you hit the nail on the head there. ;)

I work in the pro-audio industry and some of our equipment has hundreds of potentiometers. With the exception of ingress of foreign substances (most common fault), the ones most likely to fail are those that constantly, but not permanently, sit at the same position. Similarly the ones subject to temperature cycling are also quite prone to failure.

Ultimately though it comes down to the quality of the carbon compound used on the tracks. Good pots aren't cheap, especially when there are 300 of them on a product.

I haven't stripped a MM ETM so don't know if it's sealed, but if it's not well sealed against the gasses and fumes of the engine bay they are very corrosive to certain materials.

My car frequently (if not daily) goes from idle to WOT which keeps the track clear of possible contaminants. I have cruise control, but due to the nature of UK roads (congestion) we rarely get chance to use it unless we travel everywhere at 55mph. As I try and aim to cruise at 90mph I spend much time modulating the throttle.

The only potentiometer failure so far in 250,000 miles has been the brake pedal position sensor in the servo, but not having a turbo heat shield fitted may be to blame for that one.

Cruising at a constant speed in a hot climate is probably the worse case for these ETM's

I would however say that it's not a certainty that they will fail in XXXXXX miles. Much of it will depend upon the use the car gets, and the environment in which it's used. Bizarrely, the cars that get the most gentle use are probably the most likely to fail.

As for me....... My aim is to get 300,000 miles from one ETM... :o :o :o :o

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