I have a 2008 IQ 700. Last year when i purchased we did not have any snow and didn't ride much. I put a total of 100 miles on this sled. My problem is it runs great for about 20 miles. Then if you pin the throttle it starts bogging. Pull the plugs and the left cylinder is flooded out. Put new plug in and will run like a top for another 20 miles then same deal. I currently have sent the injectors off to witch hunter. Just wanting to cover my bases and see if anyone has any other suggestions. As far as i can tell there really isn't anything else that it could be. Also did compression check and both cylinders were 106ish psi. Anybody have any other ideas? Sorry for the long post.
08 IQ 700 Flooding 1 cylinder
- Thread starter tjensen_05
- Start date
The compression could be low if the OP is above sea-level. Typically 115-120 at sealevel is what I'm seeing.
Sounds like you are on the right track sending out the injectors. The only other thing to check would be to see if the ECU is actually commanding the affected injector/s to go full open. This is definately not a common issue and I'm not sure if I have heard or read about one doing this.
I would also verify correct TPS adjustement/operation.
Are you running an aftermarket fuel controller by chance?
Are we positive it's actually fuel and not the possibility of coolant getting into the cylinder?
keep us posted on what comes of this.
Sounds like you are on the right track sending out the injectors. The only other thing to check would be to see if the ECU is actually commanding the affected injector/s to go full open. This is definately not a common issue and I'm not sure if I have heard or read about one doing this.
I would also verify correct TPS adjustement/operation.
Are you running an aftermarket fuel controller by chance?
Are we positive it's actually fuel and not the possibility of coolant getting into the cylinder?
keep us posted on what comes of this.
I do not have an aftermarket fuel controller on this. I am almost positive it is gas not coolant but i haven't actually been able to ride/get it to do it again. As far as the ECU is that something similar to say OB2 in a car. Would i need a scan tool to check operation of this? Thank you for the replies!
The digital wrench is the scan tool that Polaris uses. I am not sure of it's data stream capabilities. I think you are on the right track though with having the injectors flow tested. Hopefully, something shows up. It may be difficult for the flow test to re-create the symptom if it normally takes 20 some minutes for it to act up.
Electrical glitches, especially intermittent can be tough for the average guy to diagnois, (even the most experienced) I think what I would do though is just pop the head off while you are waiting on the injectors and verify that coolant isn't getting into the combustion chamber. If it looks good, reinstall the injectors and go from there.
If it continues to act up, maybe swap the injector wires from the ECU to see if it follows the injector to the other side of the motor or use a multi-meter and backprobe the wires and watch the voltage to verify the ECU is commanding full opening of the injector/s.
All good ideas. After a little investigating I have searched and I am going to build me a TPS tester tonight and i will also check that. I will also pull the head since I'm already this far, check for cracks and a fresh top end! I also have the VES valves out and cleaning them up. This is the first time I've been on here and thank you Dave for the great replies!
