Calling :Norweigan-your dcs expieriance

harness racer said:
one would think that if the sled is jetted to 01 specs ported or not 110 fuel or 94 there is no reason for this false signal because 01 dont blow up all over the trails . I am a yammy man but one has to admit that the system may not be all that ... I would suspect that the cranks in 02 are similar to 01 , therefore the possibility of the system collecting wavelengths or vibs may be true , only prooves the theory of over sensitivity in my opinion. Im sure 02 are everybit as good as 01 without that system ..
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the cranks are the same darn thing.. same darn motor.. Completely interchangeable.. Good point on the 2001 specs with it never having problems.
 

The sensor is located on the cooling tube that is attached directly to the heads - one would not think that any other vibrations, wavelengths, whatever, would or should reach that tube - it is pretty much isolated to the heads and cooling system - can't believe anything would be transmitted through the cooling system strong enough to trigger the sensor - I would think the only explanation would be some faulty sensors - nothing else makes any sense!!
 
When I had 150 PTO 148.8 center and mag mains, I have never seen my plugs look so beautifully golden although the DCS was coming on. I jetted fatter to 152.5's Light still came on but took a little while longer but plugs were extremely blak.

I waiting on norwegian to try out that washer.
 
...SOFISTCATED...

Not as good at spelling as you are at clutching Tony?? - I'm just messin with ya!! - we should all be friends here by now!!! - I guess if it wasn't sophisticated it would have been figured out by now!!
 
...I waiting on norwegian to try out that washer...

If that works, wouldn't that really mean that the sensor is bad?
 
its cool that you guys understood what i was talking about with the wavelengths/vibs, cause i'm not so good at explaining what my brains thinking.
 
Well, quite frankly I didn't understand a single thing you were trying to say but I tried to answer it anyway!!! - LOL!! - now I'm messin with you!!
 
yammiman said:
...I waiting on norwegian to try out that washer...

If that works, wouldn't that really mean that the sensor is bad?
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Not necessarily, My motor is not stock. Could be the wave length thing possibly. If so, the sensor is no longer calibrated for the motor so why buy a new sensor?

On a stock motor, its a cheap fix cause sensors are $100 a piece.
 
On a modified motor, I would just go old school with plugs and piston wash - keep in mind anytime you modify something, it does become more fuel quality sensitive - not so much with porting, but head changes are going to change octane requirements - don't know excatly what has been done to your motor, but if CR has been changed, you got no choice than to up your octane - you can jet fatter but it is more of a band aid if the motor really wants more octane - jetting and octane are very simular, but not exactly the same - then throw the different fuel blends into the equation and it get pretty complicated - going back to my original statement, plugs and piston wash don't lie - using the DCS to tune is kind of like guys that use EGT's to tune - kind of backward so to speak - I guess if it were me, I would un hook the DCS, get a baseline jetting from the person that built the engine, then start with alot of octane (110 or so) and work backwards checking your plugs and piston wash - starting with low octane working forward you are risking burn down - once you get a good reading, hook the DCS back up and see what it does - if it stills goes off, un hook it for good and run it!! - not sure what else you could do!!
 
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yammiman said:
WOW!! - can you believe this post is 5 pages long on a system that is 6 years old!!!
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No I can't, it's what you call beating a dead horse............


The sensor is mounted on the water rail because sound is transmitted through fluid well............
 
Update:

I took the sled to the county's biggest yamaha dealer and then the regional speedshop.

This is what the results were:

Leakdown test: Pto: 18% leakage, center: 0% leakage: mag: around 10-12% leakage (don't remember exactly). (this sled had new rings a few hundred km ago). Around 5000 miles on the engine.

So I took it to the speedshop for repairs (since it is way cheaper than the dealer).

All pistons under specs, had to be replaced.
New rings also in.
Timing key: NON STOCK timing key!
One powervalve pulled through
Crank: ok

Will not be able to test the sled before around 5th of april. By then I will also have fuel ficht catalysts to put in the gas tank.

Clutching will be a #5 hauck clutch kit.

Stay tuned.
 
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