Does it have a separate ignition module?
Nope, the ignition module is built into the ECMDoes it have a separate ignition module?
No 02 sensor, would be a good idea thoughDoes it have an oxygen sensor? If so unplug it and see if it changes anything.
Funny you mention this, as prior to yesterday I didn't even consider a fuel problem; I believed the whole problem to be spark related. However, looking up more info after I posted this thread and remembering when I replaced the spark plugs the plugs were not overly wet or gummed up which points to not a spark problem to me. Looking up more info, seems like there is a known problem with the fuel pump on the 800s overheating and not working properly or not working at all. Which would correlate to my issues as it's when the quad "warms" up.Just throwing spitwads-
how do you feel about your fuel system?
You are adding air via throttle with not increase in power.
possibly fuel pump bad or starving from foreign object in tank/sock or air leak above siphon?
I bought the cheap ebay pump lolMy Buddy has a Ranger 800 that I believe is the same year. Would do pretty much the exact same thing. It was fuel pump. He bough a cheap ebay one and it did it again a while later. Been good since installing OEM pump.