Stuck in Andalusia, Alabama with dead ST

[thfraser]

Yea! ::012::

 

[Don in Lodi]

I need to find a blow-up... are the injectors a part of the throttle-bodies? He did say the position sensor had been replaced, right? Just running things through my head to see what else is in there besides two butterflies that might screw up.

 

[markjenn]

I need to find a blow-up... are the injectors a part of the throttle-bodies? He did say the position sensor had been replaced, right? Just running things through my head to see what else is in there besides two butterflies that might screw up.

The injectors screw into the TB's. Usually in stuff like this, its not a major mechanical assembly that fails, but some electrical connection, sensor, etc. or something blocked up. If they swapped the TB's, then they swapped a whole bunch of stuff and broke/re-made a lot of connections. It could be a lot of things. I don't know the outfit doing the work, but many shops really don't have a lot of diagnostic technical expertise - they just tend to swap parts until it works.

- Mark

 

[Ahdrvr]

I can't speak for their expertise but I have been pleased with their professionalism and service. Throughout the process they made it clear that once they got beyond the basic troubleshooting outlined in what I assume is the shop manual for the bike, all troubleshooting and replacement of parts was directed by Yamaha. Like most dealers they sell many different makes and service them as well.


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[Don in Lodi]

The injectors screw into the TB's. Usually in stuff like this, its not a major mechanical assembly that fails, but some electrical connection, sensor, etc. or something blocked up. If they swapped the TB's, then they swapped a whole bunch of stuff and broke/re-made a lot of connections. It could be a lot of things. I don't know the outfit doing the work, but many shops really don't have a lot of diagnostic technical expertise - they just tend to swap parts until it works.

- Mark

I had bet money with myself that the ecm was the most likely culprit. I've been dealing with vehicles with hundreds of thousands of miles, very seldom has a pure connection issue occurred unless it shows up with obvious corrosion. De we have a mass air flow, MAF, or a manifold absolute pressure, MAP sensor bundled with that throttle body? That could have been a good bet too.

 

[Ahdrvr]

I got the bike back on thursday and have put about 150 miles on it since then. No issues. Runs just like it did before except now the ECU between my ears is paranoid at every little sound the engine makes. No worries though, nothing a few hundred more miles wont fix. Thanks again for all the help from everyone.

 

[creggur]

I don't know the outfit doing the work, but many shops really don't have a lot of diagnostic technical expertise - they just tend to swap parts until it works.

- Mark

I've got three Platinum level Hyundai techs that work for me - most dealers don't have one, and I know how lucky I am to have these three guys. That Platinum status isn't just a few web courses, it takes years of training, much of which is displaying hands-on troubleshooting ability. And all three are ASE masters with L1(Advanced Engine Performance).

One of these guys, Mark, is one of three techs in North America that's been working on Hyundais since their introduction here in 1986, and the other two apprenticed under him at our store, and have been working on Hyundais for 10+ years. All three have won district and regional troubleshooting competitions.

Sometimes, even when all three are putting their heads together on a weird problem, have contacted tech line, and talked with the field engineer, we swap known-good parts to look for a difference. Electrical problems (especially) aren't just hooking up the scan tool and pulling a code, it's way more involved, and often, swapping in a known-good part is the most sensible next step in troubleshooting a problem...

Glad they got the OP back on the road though!

 

[EricV]

Glad to read that the OP has a running bike again. Best wishes for him for a safe deployment and happy return home afterwards.

Interesting that the TB assy. replacement solved the problem of surging and dying. The TB assy. has three sensors, a pressure sensor on the fuel rail that appears to be fuel pressure, (2C0-82380-00-00), and what appear to be two throttle position sensors, one for each side or throttle body. One of these is referred to as a "throttle sensor assy." (13S-85885-00-00), the other as a "accelerator sensor assy." (13S-85884-00-00).

Other than the injectors, it would come down to some part of the throttle by wire assembly. There is a new part number for the throttle body assy. too, suggesting some change integral to the throttle body assy. itself.

http://www.stadiumyamaha.com/pages/OemParts?aribrand=YAM#/Yamaha/SUPER_TENERE_-_XTZ12BL_-_2012/INTAKE_2/XTZ12BL_(2012_MOTORCYCLE)/INTAKE_2_(XTZ12BL_-_2012)

Hmmm. I'd love to know exactly what caused the problem.

 

[creggur]

Glad to read that the OP has a running bike again. Best wishes for him for a safe deployment and happy return home afterwards.

Interesting that the TB assy. replacement solved the problem of surging and dying. The TB assy. has three sensors, a pressure sensor on the fuel rail that appears to be fuel pressure, (2C0-82380-00-00), and what appear to be two throttle position sensors, one for each side or throttle body. One of these is referred to as a "throttle sensor assy." (13S-85885-00-00), the other as a "accelerator sensor assy." (13S-85884-00-00).

Other than the injectors, it would come down to some part of the throttle by wire assembly. There is a new part number for the throttle body assy. too, suggesting some change integral to the throttle body assy. itself.

http://www.stadiumyamaha.com/pages/OemParts?aribrand=YAM#/Yamaha/SUPER_TENERE_-_XTZ12BL_-_2012/INTAKE_2/XTZ12BL_(2012_MOTORCYCLE)/INTAKE_2_(XTZ12BL_-_2012)

Hmmm. I'd love to know exactly what caused the problem.

I know that speculation is worthless, but I'm betting on one of the Throttle Position Sensors. Seen them cause some crazy problems on cars...

 

[Ahdrvr]

They had already replaced the fuel pressure sensor and both throttle position sensors.

 

[creggur]

They had already replaced the fuel pressure sensor and both throttle position sensors.

Ha! Guess I was wrong.

Glad they got you mobile again!

 

[snakebitten]

It's always the last thing. 8)

 

[Don in Lodi]

Hmmm. I'd love to know exactly what caused the problem.

::008:: ::008:: The shotgun method works sometimes, but it ain't very informative.

 

[Juan Valderrama]

Please look at the fuel filter MOD

http://www.yamahasupertenere.com/index.php?topic=1832.msg218219.msg#218219