Massimo UTV SxS Forum
This is for all of you Massimo UTV, SxS (Side by Side) owners. Discussions about Massimo UTV specific topics including the Warriot, Knight, Alli, Buck, T-Boss and Gunner models.
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2015 polaris rzr xp1000 highlifter On Ebay https://www.ebay.com/itm/2015-polaris-rzr-xp1000-highlifter/233468644621? -
Thanks for your replies guys. I might have fixed it. I changed the idle air control valve. That seems to have fixed it although I have only gotten to test it briefly as the temp here is cold. I had forgotten that these fuel injected ones have an idle air control valve. The old one seemed to be stuck as to not feed any air while trying to start the engine. Thanks again and will update thread if appears to not be fixed upon further testing. -
I'm changing from a Subaru EX27 265cc to a Predator 420 on my Bull Dog UTV. What did you do for the electric start on yours? My Subaru had a 277-71901-01 regulator on it. Do I need it still? Thanks. -
I think that Dave's on the right track here. I'd definitely test that particular sensor. And also verify the actual temperature. The thermostat is activated by heat. So if its working, the motor should be heating up. -
By Dave Piccirillo · Posted
The EFI computer sets the fuel mixture based on the Engine Coolant Temperature (ECT) sensor. Since your spark plug indicates a rich mixture and your engine temp reads cold, the ECT may be bad. I have seen this happen on EFI cars. I don't think the ECT is very expensive or hard to change. Might be worth a try.
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