08 nytro mtx mcx problem

[yamahamm]

my nytro stopped. fault code 33-34-35 came up. towed it home and looked over it. fired it up and all worked fine, drove 1mile and it stopped again. it starts but dies when i touch the throttle?? help please

sorry for the bad english.

 

[yukon yamaha]

33,34,35 ARE IGNITION COIL OR PRIMARY CIRCUIT

"trhe warning light and engine icon will flash. the gauge will flash 33 cyl 1
34 cyl 2 and 35 for cyl 3

 

[WolfOne]

Don't think possible you burn all 3 coils so think you have problems with primary circuit.

I've not got the shop manual under hands this evening but If the sled normally starts and than die, than restart & dies cycling could be some wire going ground or lots of other things.

 

[errol]

Check your ignition fuse for corrosion!

Mine was not burned but corroded and was causing all kind of problem!

Just my $0.02

 

[WolfOne]

Like errol said, check fuses and clean contacts.

Check your battery (bad battery could not support properly ecu and or ingition)

Check sparks ... (seen just one time a fused spark that blowed the coil)

Check the orange - gray/red - orange/green wires from the coils to the ecu.

Check the red/white wires from the coils to everywere (those are boring)

You can enter the 'diagnostic mode' and check the 3 coils

Nothing more in my mind at the moment

 

[yamahamm]

thanks. hopefully the nytro is fixed after this weekend.

 

[yamahamm]

today i tested the nytro again. checked all wires and contacts. did run fine but stopped when it got operating temerature..

 

[WolfOne]

Again 33 34 35 codes?
Not match with 33 34 35 Codes but try to disconnect temp sensor

 

[yamahamm]

will try that. no codes this time.

 

[WolfOne]

No code could be like a code.

Last year i had my Nytro shouting down random and without reasons for a long time.

The problem was the broken zip tie that holds the speed-sensor wires behind the clutch.
Wires went random in touch with the clutch and sent wrong signal to Ecu.
Speed signal and rpm signal didn't match and Ecu shut down engine.

So you can check and disconnect speed sensor.

But without a code error you should check each sensor, each connector, each wire

 

[yamahamm]

yup. now the nytro starts and runs fine. but when i give it full trhottle it stops and the self diagnostic ligth comes on. i can start it right up again and it works fine. only stops when i give it full trhottle????

 

[T-Nytro]

Check where the main wiring harness wraps around the front of the motor. Clutch side of the sled. There is a little nub that is cast into the motor that rubs the main harness and it causes all sorts of codes to come up. this is a common problem on 2008 Nytros

 

[yamahamm]

wirering harnes is reroutet on my nytro. but now i tryed to disconect the speed sensor and now it wont run. it idles fine but stopes when it hits 4000rpm?? both with the sensor on or off.

 

[yamahamm]

Yea this was the crank sensor that was broken, its a fault in the computer on nytros so it will throw code 33 34 35 instead of the code 12 that it should.