2008 mtx nytro code 34 ??? need help please !

[apracing]

cheers everyone...im new to this sight . im in need off some help !! i bought a 08 mtx nytro , when i got it home ,while riding it started missing ,code 34 came up . i thought it was the plugs ,so i changed them ,no difference i switch coils around ,no difference , tried to erase the code and its stuck in there ,i then pulled the harness out and found a bad wire ,repaired and no difference ,i then thinking it was a bad ecu ,i changed the pin around in the ecu connector and no change , i took the ecu off and tried it on a different nytro and same code 34 ,so i bought a new ecu,which fixed it was running great, now when i was out today ,only 25 miles in with a new ecu ,started run bad but came out off it ,then on my way home bang code 34 again ?? any ideas would be great , also i put a new battery in it , looked in most off the connectors and greased them , ground maybe ....i have no clue what to do now??

 

[sonds]

34 is a #2 cylinder coil fault, I know you said you switched them around, but have you tried replacing that coil?

 

[apracing]

I did that the first time it happened and no change , I haven't tied it this time ??

 

[apracing]

ok i just changed all coils from the other sled ,no change

 

[hugger70mtnmax]

Did you leave the new coil on it? There is a very good explanation of why it may not have changed. If the coil was indeed bad it most likely took out the coil driver in the ecu. If you left the same coil on there it may have fried the driver once again. It is rare that an ecu of any sort goes bad without something causing it.

 

[apracing]

No I didn't leave the coil on it , it made no difference in the engine , but now I have two hard codes in this ecu that I can't remove same code 34 ?? Is there any way to flash this ecu on the sled ?? Should I run the new coil longer ?? Thks

 

[apracing]

Also when I put the new ecu on it worked great , but after running it for about a hour it would start to miss acting like bad coil breaking down , then come out off it but no codes flashing but some in the #62 that I could clear , now I can't clear them ??

 

[apracing]

My buddy has a nytro but its a short track but the ecu works on mine but has a different number on it what would be the difference in ecu and the dealer tells me it wouldn't work??

 

[apracing]

Is there any other sensors that could be frying the ECu I don't want to keep changing the ECu because it's very expensive and they keep Frying

 

[apracing]

tonight i checked the battery voltage and it checked ok,just above and around 14.10 so that rules out the regulator ??

 

[temagami]

Have the same sled was getting no codes just flash light and would reset before i got read codes I thought it was a wiring issue with rubbing wiring on frame then thought it was crank sensor wires then it got worse and shut down completely with codes 33 34 35 sometimes just one would show up it seemed only when i was hitting thorttle or letting off I by passed tos at both ends I never got code 84 showing up but have not had a code since i did this machine has been fine since i was so frustrated.

 

[apracing]

Mine has code 34 flashing in my speedo and can't remove it , no fire to the middle coil , put new ecu on it and ran great , left the same coil in it and 70 miles later it did it again was told it was a bad coil frying the ecu ?? I just ordered another ecu and now changed all coils .. I hope it doesn't fry this ecu ?? Also I also by passed the tots switch ??

 

[Will lapierre]

Did u ever figure out this problem? I have a 2008 rtx and code 34-35 changed plugs and coils no raw wires don't know what to check next

 

[yamahamm]

I had 33-34-35 one year, it turned out to be the crank sensor(code 12) but it just gave the wrong code. And when we measured the crank sensor it was in specs but it was still broken.

 

[Will lapierre]

Would it be ok to just swap sensor off a known good machine and see if that fixs it? Also is it nessessary to clear these codes?