Yea! ::012::
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.Don in Lodi said: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.
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.markjenn said: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'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).markjenn said: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 know that speculation is worthless, but I'm betting on one of the Throttle Position Sensors. Seen them cause some crazy problems on cars...EricV said: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.
Ha! Guess I was wrong.Ahdrvr said:They had already replaced the fuel pressure sensor and both throttle position sensors.
::008:: ::008:: The shotgun method works sometimes, but it ain't very informative.EricV said:Hmmm. I'd love to know exactly what caused the problem.