09 Brute Force 750 running rough
Ok I have an 09 brute 750. The problem I am having is it is running what I would say is rich. Smokes black all the time even at idle and worse under throttle. If you give it gas it spits and sputters. Now if you rev it hard it clears out and wont sputter but still smokes like it's loading up on fuel. Also it won't even start unless you disconnect the vacuum lines from the front and rear of the throttle body (the ones that run to the IAC valve). Once it is running with the vacuum ports open you can put your finger over the rear port and it shuts down immediately most times or it will sound like it's on one cylinder. At times it will also pop really bad through that vacuum port on the rear and you can see a spark in it. My brother in laws brute does not do that however, as far as the vacuum part. Have checked TPS, IAC valve, cleaned throttle body, checked injectors. Has fuel injector cleaner in it now also. I'm out of ideas.