help! M1000 cutting out at 6800 to 7400

[M1000Mod162]

Hey guys just took the sled out for a ride and for some reason it is missing/cutting out at like 6800 to 7500rpm im pulling 7700 rpms. It pulls good then misses and cuts out for a a few seconds then it clears up and pulls hard after that. running a bd box i tried everything i could to fix it from really rich to lean and nothing seemed to help it. Its never done this before! Any Ideas what this could be guys. Could it be a bad reed or something. Any help would be much appriciated thanks.

 

[bamfm7]

What was the fix to the other problem you just had?

 

[M1000Mod162]

i thought it was the tube coming out of the ecu. it had some icy build up in it that i removed. this problem feels like fuel but i cant seem to fix it

 

[bamfm7]

Still the same problem ?

 

[M1000Mod162]

no this is different I think

 

[knzee]

power valves???

Don't the power valves open around 6800rpm?

 

[m1000rocks]

The power valves open at 6800rpm try cleaning them and check the cable ajustment more than likely it is one of these.

 

[M1000Mod162]

I am running the bdx valve deletes and have been for two seasons

 

[RACINSTATION]

....so your powervalves are not opening.

 

[bgreen776]

Replace your plugs and if that doesn't fix it, start looking for chafed or broken wires and bad grounds.

 

[SLEDIOT]

R urunning to light of wieghts and banging off the rev limiter?
8000 is the limiter and sometimes these 1000 gauges need to be zeroed as they can be out
my rpm gauge was out by 200 last year
and I think still is
I addedwieght and the same prob went away.

 

[M8SP_Kid]

Was this happening farther into the ride, after it got wet?
Happened to my M8, it got water in the killswitch and was doing the same thing yours was.

Theres a aluminum panel right near the the steering column. Pull that off and pull of the throttle limit switch. Should fix it till you get a new one anyways, and its a good save when you up on the mountain. Except that your kill switch doesnt work, but that sure beats leaving at noon because of something like that.

A night in the shop with all that opened up should dry it out enough but there could be damage

 

[M1000Mod162]

....so your powervalves are not opening.

bdx valves are a kit that removes your valve their just incerts. The valve is always open

 

[M1000Mod162]

Im running 76 gram weights at 10,000ft. I im pretty sure its not the rev limater because its only cutting out in the mid to top end then it clears up and pulls strong at max rpm which is 7600 on the stock tach)

Ill check the kill switch out.

Is there any chance this could be a bad reed?

 

[bamfm7]

If you think it is a bad reed pull em out and take a look.

 

[HiWaYman92]

Ha!

bdx valves are a kit that removes your valve their just incerts. The valve is always open

I think Racinstation knows this...

 

[slyrydr]

replace plugs, check reeds,....even with after market exhausts, most dynos are showing best rpms in the 74-7500 area.....also, a fuel injector that is partially stuck can do that....take off the injectors, get a 9 volt battery and hook up a thin wire to each of the connectors in the injectors...when hooked up to the 9 volt, you should be able to blow throught both of them easily...if one is harder, it's not opening all the way....first ride, maybe get some good injector/fuel system cleaner and run through...

 

[dogtownbutcher]

what are the pros and cons to the power valve delete? Can someone explain? Thanks

 

[M1000Mod162]

I will check the reeds when i get time i was just wondering if there was any chance that a bad reed could cause this problem

 

[Arctic Thunder]

I will check the reeds when i get time i was just wondering if there was any chance that a bad reed could cause this problem

It has been my experience that a bad reed will cause a miss at low rpms and high. But in the mid range where the exhaust is in perfect balance it will run fine. So IMO I doubt it is reed.

I would bet you are fouling your mag cylinder when this happens. I have been fighting this same thing with my 07 for a long time. I think I finally got mine working like it should this past weekend. I wound up installing a TPS wire from the power valve servo to shut the fuel down when the valves open. If you are running just a bit rich and the valves open the ECU will then dump fuel. That causes it to go rich, and fouls the mag side, for some reason it is always the mag side. I know you aren't running the power valves but the ECU may not no that. So the fuel curve is still running lean then goes rich when the are supposed to open. Just a thought.

Also the power valve's don't always open at 6800. It is dependent on Rpm's, load, air temperature, etc. So it moves around. Thus the reason for the TPS wire. I don't care when they open, it just shuts down the extra fuel the instant the ECU calls for more fuel. Eliminating the fouling.

Thunder