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Old 11-17-2010, 03:27 PM
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Stalling problem on Sportsman 800

Im looking for a little help. Was riding with my son for about two hrs and for no reason the atv sputters and stalls out. After it sets for 20 or 30 min. it will fire right up. It runs for a short time and does the same thing. I did have a code 51, 52 and 54 show up. After cleaning the B-TAB codes are gone. It smells like it flooding out. Here is a list of things I have tried.
New fuel pump.
Cleaned radiator.
Replaced the reflective tape on the fuel tank.
Replaced fuel with new.
Checked and cleaned the B-TAB .
Air breather tube out of the tank is clear.
Replaced the relays.
Any thoughts.

Last edited by ks4wheeler; 11-17-2010 at 03:51 PM.
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Old 11-17-2010, 05:52 PM
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Did you ever find out what those codes mean for your machine?
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Old 11-17-2010, 06:06 PM
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here are your trouble code result hope it helps
51 injector 1 : open load/short circuit to ground/short circuit to battery
52 injector 2: open load/ short circuit to ground/ short circuit to battery
54 engine temperature lamp: open load/short circuit to ground/ short circuit to battery
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Old 11-17-2010, 06:16 PM
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here is my guess, based of your two posts.

One or both injectors are sticking open, dumping fuel into the cylinder, causing the atv to stutter and burn sparatically, also raising cylinder temperature. The temperature raises too much, so the ECU shuts the machine down and prevents it from starting (as a safety feature) until the cylinder temperature has come down to an acceptable temp (20-30min time)

Probably the fix is one or both injectors will need to be replaced. Not for sure, but thats my guess.
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Old 11-18-2010, 04:29 AM
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Thanks for the reply. I did find out that the codes were injector problems. The machanic I talked with told me that if the injectors were bad I could look at the oil and see if it was thin or smells of gas. No gas smell in the oil. I think I would rather replace the injectors befor the CEU. Its kind of hit and miss. What you say about the injectors sounds like a posability. Thanks
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Old 09-18-2011, 03:48 PM
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I have an 2005 8000 sportsman that is doing the same thing . Did you solve the problem?
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Old 09-19-2011, 01:46 PM
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Before dumping alot of $$ on injectors, I would inspect the injector wiring harness thoroughly for abrasions, and bad connections.

See if you can get a OHM spec for the injectors and test them with a DVOM.

Get yourself a fuel injection pressure gauge and do a leak down test. Perhaps the injectors are not shutting off properly.

BUT, my money is on either a bad connection in the harness or a failure in the injector coil(s) internal to the injector(s).
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Old 09-19-2011, 05:45 PM
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Tks
t-bap harness seems to be a common problem as well, so checking harnesses for abbrasion and breakage seems to be the first place to start. I still have to pull trouble codes and that should be helpful. I should mention the bike was my dads and only has 1000 kms on it so chaffing lines should be limited but it does not take much sometimes, right. I hop it is not the injectors, noting that bike works great when working, but if coils break down when heating up (which I am not familiar with and whether they break down with heat), I may be in trouble with injectors.

Many thanks!
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Old 09-20-2011, 05:01 PM
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pour 5 onces of seafoam in it and see if it will clean the injectors, other wise Im bettin on t- bap harness, pull and twist on wires out of sensor and see if you can make it die or run rough by shaking them
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