2008 Polaris Sportsman 800 EFI - ATVConnection.com ATV Enthusiast Community

cmharcou · #1 (**permalink**) 10-07-2009, 07:29 AM

I have an 08 SPortsman 800 EFI. When I first start it and want to take off it wants to spudder and backfire on me sometimes it dies. It only has about 30 hours on it. Any suggestions?

switzomatic · #2 (**permalink**) 10-07-2009, 01:19 PM

Do you let it warm up for a minute on a cold start before taking off? They can be a little finnicky sometimes. I let mine warm up for a minute and take it easy for the first few while driving to make sure everything is properly warmed up and ready for abuse.

chevyman142000 · #3 (**permalink**) 10-07-2009, 01:26 PM

Mine did the same exact thing before I got rid of it. Just let her warm up for a minute or two and sh will be good to go.

stendori · #4 (**permalink**) 10-07-2009, 04:50 PM

yes if it's a cold engine you willl have to give it a minute to warm up or at least feather the throttle while taking off. imo

popoman · #5 (**permalink**) 10-08-2009, 10:30 AM

efi... shouldnt need a warm up atleast mine doesnt. any codes show when you turn the key 3 times in 5 seconds? ive read some chaffing wires at the tps sensor cause some of these symptoms.

stendori · #6 (**permalink**) 10-08-2009, 05:32 PM

even a efi could put raw cold gas in to a cold engine and cause a little stumble. granted it shouldn't be very noticeable for very long. imo

700 sportsman · #7 (**permalink**) 10-08-2009, 08:08 PM

You don't happen to have a video do you?

But anyway, mine was doing similar things after a little water riding, or a good washing, and I blew out and die electric greased up my spark plugs, and put a fair amount in the plug boots, I did it, and after several rides, I put a little more in it, and it's been good for a long time

UTU · #8 (**permalink**) 10-08-2009, 08:14 PM

TPS setting could be a lil off causing this too.

700 sportsman · #9 (**permalink**) 10-08-2009, 08:25 PM

I forgot about adjusting the slack about 1/16" in the throttle cable, this can be adjust on the cable about half way down the cable between the throttle and the pod

cmharcou · #10 (**permalink**) 10-12-2009, 08:27 AM

Would new spark plugs help this? I have changed them before in a 2006 model and its a pain in the rear end. So I have been dreading changing plugs. The ATV and plugs are only a year old.