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Discussion Starter · #1 ·
twice while coming to a stop with out Appling breaks the motor RPM dropped like it was bogged down;. this happened at roughly 5-10 MPH. I had 1/4 tank of fuel and motor temp was 175 degrees,( light trail riding). I drove it a couple miles today and it ran fine. roll over valve has been replaced so its not a fuel pressure issue. Also there are no codes on the ECU. KRX has 600 miles on it. " I've been told if the plugs are starting to foul it could cause issue"...............any thoughts??????
 

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twice while coming to a stop with out Appling breaks the motor RPM dropped like it was bogged down;. this happened at roughly 5-10 MPH. I had 1/4 tank of fuel and motor temp was 175 degrees,( light trail riding). I drove it a couple miles today and it ran fine. roll over valve has been replaced so its not a fuel pressure issue. Also there are no codes on the ECU. KRX has 600 miles on it. " I've been told if the plugs are starting to foul it could cause issue"...............any thoughts??????
The plugs are the first place I would be looking right now.
 

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Discussion Starter · #7 ·
did you ever get this resolved? And did it happen when going pretty slow and not applying the throttle very far down?
did you ever get this resolved? And did it happen when going pretty slow and not applying the throttle very far down?
The after market roll over valve was causing the issue; Unfortunately my KRX came with California emissions, so when I removed the one way valve and installed the roll over valve it allowed pressure into the emissions canister..... I re-installed the one way valve and inserted a tee below it and ran a new 4' vent line for the roll over valve to the back of the car.
 

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The after market roll over valve was causing the issue; Unfortunately my KRX came with California emissions, so when I removed the one way valve and installed the roll over valve it allowed pressure into the emissions canister..... I re-installed the one way valve and inserted a tee below it and ran a new 4' vent line for the roll over valve to the back of the car.
is your krx 100% stock?
 

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The after market roll over valve was causing the issue; Unfortunately my KRX came with California emissions, so when I removed the one way valve and installed the roll over valve it allowed pressure into the emissions canister..... I re-installed the one way valve and inserted a tee below it and ran a new 4' vent line for the roll over valve to the back of the car.
Can you shoot a pic or 2 of the mod you did? I have the Cali model as well, when I pulled the cover and center console and saw all that emission crap I didn’t install the valve.
 

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Discussion Starter · #11 ·
Can you shoot a pic or 2 of the mod you did? I have the Cali model as well, when I pulled the cover and center console and saw all that emission crap I didn’t install the valve.
Sorry Rob, didn't get any pics before I installed the cover and the seat went back in. Text or call me and I can walk you thru it.....702-526-541FOUR
 

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@Bama Vince Yeah, I pulled mine all apart before, so I’ve seen what’s cookin. I was trying to get a visual of how/where @riding in nevada desert installed the extra “T” and vent line in the setup. He ran into some problems with the setup the way you have it, and he came up with a work around.

Bama, those 2 vent lines on the left of your valve are the ones coming from the canister under the center console. 1 is a vent, and the other goes to the motor. (The canister collects fuel vapors and sends it to the motor to get burned off) I didn’t install the valve on mine because the current setup could cause issues.
2875

Personally, I’d like to pull all this crap out, but I know it will trip codes in the ECU.
 

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@Bama Vince Yeah, I pulled mine all apart before, so I’ve seen what’s cookin. I was trying to get a visual of how/where @riding in nevada desert installed the extra “T” and vent line in the setup. He ran into some problems with the setup the way you have it, and he came up with a work around.

Bama, those 2 vent lines on the left of your valve are the ones coming from the canister under the center console. 1 is a vent, and the other goes to the motor. (The canister collects fuel vapors and sends it to the motor to get burned off) I didn’t install the valve on mine because the current setup could cause issues.
View attachment 2875
Personally, I’d like to pull all this crap out, but I know it will trip codes in the ECU.
oh ok I got you now. I didn’t have the problems he had. Or if I did I just figured the hesitation is the way the machine came programmed. It seems the PM3 fixed it for me now. I wonder if I could pull that emission crap out, and then delete the codes away with the PM3? I’m just a wredneck, and not sophisticated enough for the ecm stuff. Maybe I’d try it after the warranty is out.
 
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