2008 M1000 running on 1 cylinder and spitting fuel out of the pipe?????

[doornenbal]

Last week I had my sled started and went to run it into the garage. One cylinder went down and I was not sure why?? Changed plugs and tried again still nothing. Took the head off to see if anything was wrong there it all looked good. First compression test was wonky (my ow fault) Second one with the head back on was within 2 PSI so all is good there.

Started the sled last night with brand new plugs and it was still only running on 1 cylinder but there was fuel spitting out of the y pipe and if you held you hand by the can it would be covered with fuel. Took air box off it had fuel in in it???? Of course to start had to hold the thorotle open.

If it was carbed I would say a stuck float but where to begin on this sled I don't know. No codes came up for the injector failure

Computer ????
Injector???


Any ideas let me know.

 

[mrquick68]

sounds like a stuck injector. Pull 'em and swap 'em. see if the problem is the injector related or spark.

in fact - i check spark first. make sure you are getting spark on both sides. Pull a plug, put it back in the boot but lay it against the motor so it grounds. see if it sparks.

 

[doornenbal]

Should mentioned that I checked spark on all plugs and yes there was spark had to pull and watch at the same time so I saw spark on all of them. As well I put a new plug wire ETC on the side that is not running due to some wear.

 

[doornenbal]

As well the injectors should just un plug and pop out without too much force correct. Take the delivery tube off and away you go???


Is there a way to ckeck if they are working correctly when I have it out??? Don't really want to spend 500 on an injector to give it a try. Is there a way to clean it and see if this works??

Would a dealer be abler to hook it up to there compute and see in the injector is staying open????

 

[robsonic]

some deaalers could help.

depending on your dealer , they should be able to do a cylinder drop test , but they will need cats 2008 to current softwear on their efi scan tool/monitor. you could also do a injestor spray test... but be carefull , 42 psi and any spark near by could be a disaster !!! remove both injectors and point them at a piece of cardboard ( towards front of sled ) pull sled once (short pull 1-2 revolutions) with kill (run position) on..and grond spark plug leads with plugs out ( to prevent open spark ) ! spray should be same on each side & if injecter is leakn down you will see it dribbling after test is dont . also cold hook up fuel pressure gauge a fuel tank outlet and see if pressure drops when unit sits after pulled over a few times. good luck.

 

[WestMont]

We had a M1000 due the same yesterday. The sled was running fine for the first couple hours and after turning it off for a short break it never wanted to start again.
We could get it to start and run for just a bit but then the pto side would flood out and the motor would quit. When we first pulled the pipe off everything looked fine (dry) and only after sitting a bit would it fire up and run but then quit again after a few seconds. After several attemps to get it running it then started to dump a lot of fuel into the exhaust. Pulled the pipe off and it would just run out.
Everything we checked looked good, spark, reeds, fuel psi 38 psi when I noticed, didn't check compression but you could tell it seemed to not be lacking, checked all wiring and connectors and all looked good.

 

[Alberta Sledder]

I had the same problem with my 2008 M8 a few months ago. Spitting fuel on the Pto side and pulled everything apart. There was enough fuel on the floor and inside one cylinder to make a nice bomb.

I phoned everyone and checked/swapped injectors. I was ready to send my sled 500 miles to someone I trusted.
As a last resort I asked a different local arctic cat dealer and they stopped me mid sentence to say...water/ice in the fuel, I did not think it was funny...but tried more than enough methyl hydrate anyways. After mixing the fuel thoroughly and 30 minutes of hard pulling, it apparantly cleared enough contaminated fuel to run. After idling for about 10 minutes, it has never had a problem since.

I learnt to top up the fuel tank after a hard ride no matter what....

Hope this helps.

 

[WestMont]

I had the same problem with my 2008 M8 a few months ago. Spitting fuel on the Pto side and pulled everything apart. There was enough fuel on the floor and inside one cylinder to make a nice bomb.

I phoned everyone and checked/swapped injectors. I was ready to send my sled 500 miles to someone I trusted.
As a last resort I asked a different local arctic cat dealer and they stopped me mid sentence to say...water/ice in the fuel, I did not think it was funny...but tried more than enough methyl hydrate anyways. After mixing the fuel thoroughly and 30 minutes of hard pulling, it apparantly cleared enough contaminated fuel to run. After idling for about 10 minutes, it has never had a problem since.

I learnt to top up the fuel tank after a hard ride no matter what....

Hope this helps.

Great info. I could see this being our problem also.

Thanks.

 

[WestMont]

Well we're still not running but what we found so far is after cleaning out the fuel tank, lines, fuel rail, and injectors the best we could we did have a bit of water in the system(some droplets). We spent quite a bit of time cleaning everything to be sure the water was out of the system, assembled evrything, started, and ran for awhile. We thought we had it and then the pto side started to flood out again.
We then switched injectors and the problem stayed on the pto side. The last thing we tried was switching the coil wires from side to side but then we had to much fuel in the pto side for it to want to start so we will let it sit for the night and try again tomorrow. We think after switching the coil wires it is now trying to fire on the pto side instead of the mag side and with the pto side flooded out it will not run but not sure at this time.
If this is the case then we think we need to start looking for and electrical problem.

 

[rcditchpickle]

Thank you for the help WESTMONT I started on the ele, and it all checks out good. I will take off the Attitude box next I guess. Any other help would be great Im at a loss. When it is cold it will start and run for about two min, then flood out on the PTO side

 

[rcditchpickle]

Well the Attitude fuel controler Is off the sled now and it runs great.....
I have ran this Attitude box for a year and a half with no prob.
When the sled would run the box would work and I could adj it just fine