yamazoom
Veteran
Rode in 3-4 feet of powder yesterday and engine missed and had very poor low rpm throttle response, would not idle, and on long pulls acted like it was running out of air. The hood was completely covered in snow. Has this happened to anyone else? When we headed out, it ran good down the trail and the idle returned to normal.
Was it running rich or lean when acting up?
mmmkokanee
Expert
i run k&n's and had them plug full of snow and then they freeze (hitting 3-4 foot powder drifts)...i let it idle for a few minutes to thaw out and then shut it off and let it sit for about 10 minutes...fixed it 
yamazoom
Veteran
I believe it was running rich. I pulled the hood and air box to see if there was snow it it, there wasn't. I was boondocking and the throttle response got so bad that it would not even rev up. This is my first 4stroke so I have no previous experience with this condition. If it was a 2 stroke it would act like my cat did last year when side hilling pipe side.
KbxSrx
TY 4 Stroke Guru
sucking snow, even though you didnt see it, water must have gotten into the airbox. My SRX did that every time in the deep snow until I put in a cold ai kit.
Ken this is fuel injection the snow should not bother EFI like it does a carb. May be a sensor out of whack. Was this in high elevation where it acted up and lower elevation when it ran ok again? Check to make sure the throttle body is attached correctly and secure with no vac leaks.
KbxSrx
TY 4 Stroke Guru
I thought about the efi as well, but a load of snow turning to water could muck things up, couldnt it? It would run very rich you would think after ingestion?
KbxSrx said:
Yes it would for sure but I think he would have seen some in the airbox and filter. I really think this is something else like a bad elevation reading or something like that. Might even be electrical wet wires or something because that bottom end is so open and unprotected snow has got to be getting in there and melting for sure.
KbxSrx
TY 4 Stroke Guru
alrighty then. You know more about the fuelies than I do for sure, just an offer.
You been to the hills yet? We were out last weekend in Revy, Apex never missed a beat.
You been to the hills yet? We were out last weekend in Revy, Apex never missed a beat.
KbxSrx said:
Well no I dont know more I just look at the EFI like I would my car and if it (my car) ate a lot of snow it would purge it through and be done with it. No I have not been there yet but getting the urge more and more. How much snow was there? What a great game for the Grey Cup today and sorry if you were cheering for Montreal. lol
yamazoom
Veteran
The elevation we were at was approx. 9000-9500 feet. I pulled the hood, headlight pod and air box lid to check for snow ingestion. The inside of the air box was completely dry. I did tow about 80 miles in rain/snow wet roads and the sled was an ice ball by the time we got to the hill,(cover hasen't come in yet). This was the 3rd ride on the sled and the other 2 times it ran real good, did however have a slight hesitation down low, very slight. The sled seemed to run good once we hit the forest service access road out. We put on 30 miles and it used over a 1/2 tank of fuel. My buddy's 900 cat used about the same.
slymax
TY 4 Stroke Junkie
Try some fuel injector cleaner in your tank. Make sure it is the kind that says it absorbs moisture in the fuel, it will say hydrophillic or to that effect. Water in fuel could have caused your problem. Fuel injection systems are more susceptible to getting water in the fuel due to the excess warm fuel returning to the tank.
bigrock33
Veteran
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throw in a can of Sea Foam and see what happens- will absorb, stabilize and clean - not very abrassive either.
TurboVector
Expert
Does the Apex have throttle-body heaters? I had the same thing with my Vector on Saturday and I turned on the carb heaters and it cleared up immedately.
yamazoom
Veteran
I know that coolant runs through the throttle bodys but I don't know if you can turn if on/off. It was very cold on the mountain that day.
