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New member here,
I have searched here and other places and have not found an answer to my problem. As the title says I have a 2014 420 Rancher that recently started having an issue were the revs before the clutch engages.
I have checked the oil level (per the service manual) and replace the Valvoline ATV 10w40(less than 5 hours) with 10W30 GN4 for good measure. I have used the "pin" method to pull a DTC. I shows a 8-1 which is a TPS error. This makes some sense, as if the computer doesn't read throttle position correctly, it could have this symptom. I have checked the source voltage, and tested the TPS off the quad with a Fluke and a power supply at 5v. It is smooth and does not seem to be a bad sensor. I am confused by the DTC, because the PS light blinks the code, not the check engine light. However, there are no PS codes of that value. This condition appeared after a couple days of driving in the cold (~32°) and driving though some water/bogs.
A couple questions. First has anyone seen this issue, and do you have any suggestions? I have followed the troubleshoot right up to the point of replacing the ECU, which I don't seem to have one on the shelf :)
Second, anyone used a OBDII reader with an a 4pin adapter to pull codes? If so, what system do you use?
Beyond the rev issue, the quad runs and starts perfectly and when it decides, the clutch grabs tight (no slipping)
I just purchased the ATV and it run really rough with the breather filter on and lid on the breather box. Once I take the lid off and remove the filter it runs better but it backfires through the carb.
What could I do to fix this.
The carb is fairly new.
And I put high grade non ethanol gas in it hoping it would help some.
I recently got a great deal on a 2001 Big Bear 400 4x4.it sat in a barn for 2 years while the guy was in college,so it need carb work...got it to use around the property,not racing or anything crazy with it
It runs GREAT and strong..no smoke or funny noises,just seems to have an issue at times ,when you hit the throttle it want's to die ,most of the time it runs strong.
So am debating a rebuild kit or new oem carb...i got to looking around really good yesterday and found this broke off..( the bent tube where the pencil is pointing).... is this a part that comes with a new carb?..if not,,where can i get the part?
I found a diagram online but it does not show the bent tube with a nut on it but says it a "Starter set" in the diagram(Number 21 in the diagram)
I checked the petcock and it is getting plenty of fuel flow..but it has the common drip leak..so i am ordering a new one,..was going to get the seal kit but for the price it is about the same price as a whole new petcock
Just trying to figure out where i can get this part for repair
I'm fitting a new carb on my King Quad LTF300. From China. Only one I could find in UK. I think it should have 2 vacuum ports.
The vacuum port for the petcock is silver coloured. I can feel the pulsing vacuum. Putting the tube to the petcock there operates the petcock100% perfectly.
I can't identify the vacuum port for the fuel pump. The new carb is identical to the old EXCEPT that in what I think is the 2nd old fuel vacuum position is a brass upright port with a very small hole. When running, there is no vacuum I can feel and putting the fuel pump vacuum line there does not give a decent fuel flow - only a small trickle.
Is this the fuel pump vacuum port - see photo?
The carb came with a silver coloured screw-ended 1.5 inch long loose port in the box. See photo. Is it intended that you unscrew the brass port somehow and put in the silver one?
I'd really appreciate your help At the moment I can only do 10mph in a stuttering fashion on the level!
and put in the silver one?
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