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Old 12-20-2009, 05:09 PM   #1 (permalink)
JLC
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580 EXT EFI Fuel Pump Problem?

First off hello to fellow sledders out there, we have waited long enough and finally there is 24" of snow at my house. Took the Artic Cat 580 EXT for a blast around the yard and wanted the kids to ride for a while.... but nooooooooooooooooo that would be to easy wouldn't it?

Sled started fine, I have started it up once a month since I put it away last year, I started noticing it wanting to cut out like there was a loose wire..... but checked everything and squirted connections with CRC to displace any water. Last year my kill switch was the problem, so I squirted that also.

Turn the key on, the fuel injection makes its 5 second hum and she starts and runs, and I even took a few laps around with it and it ran fine.

Then....... it cut out way in the back of the yard, and I would pull start it, it would start then would not take any throttle.. then I could get the revs up to 3500 and she would cut back down again.

I was getting a idea that I'm having fuel pump problems. I got it started again, and it ran like a bear 3 more times around the yard and then it quit.

Now when I turn the key, I'm hearing "thump thump thump thump thump thump thump" until I turn the key back off. The sound is under the handlebars and in front of the gas tank.

The red light on the ignition module is flashing red at the same beat as the thumping sound.

Fuel pump issues?

I checked for rabbits but there were none, maybe mice but no rabbits..... so there goes all the rabbit / thumping jokes hahahahahaha

Thanks for your future advice and have a safe winter.

Oh BTW, I hit my canoe that was upside down buried in 2 feet of snow with my left ski and got thrown off the sled.. It was kinda fun actually, but I thought the sled was going to roll on me for an instant. I looked around for laughing neighbors but there were none.

Its been a rough day so far.
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Old 12-20-2009, 06:02 PM   #2 (permalink)
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Check the charge on the battery and make sure your stator is charging it as well. When it's off you should get 12+ volts when it's running it should read 13+ volts and mabey check it once it's warmed up and running to, heat can change the voltage from your stator. I'm no expert but you could give this a try.
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Old 12-20-2009, 06:31 PM   #3 (permalink)
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Thanks.... at this point the sled will not start, the battery is good & charged, and I tried it with a charger on it also.

I'm reading the manual thats here on this site, it looks like I need to pull the cowling off to get at the fuel pump, and to see if thats whats making the sound.

Seems like there could be nothing else possible as its the only thing that runs electrically when the key is turned on ...before the engine has been started.
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Old 12-20-2009, 07:04 PM   #4 (permalink)
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Is the LED flashing a sequence of long and shorts?
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Old 12-20-2009, 09:09 PM   #5 (permalink)
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Is the LED flashing a sequence of long and shorts?

I will check tomorrow and post results.

Thanks. JLC
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Old 12-20-2009, 09:21 PM   #6 (permalink)
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You should also check your fuel pump relay. If your pump fires up when conected directly than the relay is the next thing to check. mine went on me and I tested everything else till someone mentioned the relay and that was the problem.
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Old 12-20-2009, 09:31 PM   #7 (permalink)
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Is the relay mounted in plain sight or is it buried?
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Old 12-21-2009, 08:25 AM   #8 (permalink)
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I would pull the pump! The relay would be ok since you hear the pump thumping! The led on the computor will flash out a code! One short followed by two longs and repeated would be code 12!
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Old 12-21-2009, 08:48 AM   #9 (permalink)
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Is the LED flashing a sequence of long and shorts?
Ok just turned the key, thumping is very rapid, and battery light on dash flashes with the "beat" and also the red LED is flashing in sync to the dash light, and the noise.

All very rapid, no pauses or "long flashes"

All short flashes about 3 per second.

Thanks all.
JLC

P.S. The noise sounds like a starter on a car with an almost dead battery.. its that fast clacking sound of the solenoid trying to engage..... on a car.

My AC580EFI is a pull only start btw, starter not there.

Last edited by JLC; 12-21-2009 at 08:51 AM. Reason: add info.
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Old 12-21-2009, 08:55 AM   #10 (permalink)
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Is the relay mounted in plain sight or is it buried?
Thanks, Is there a quick way to pull the tank, like pulling the seat first, then the tank can be backed out..or does that whole black plastic cowling under the handlebars need to be pulled and then the seat & tank.

TY JLC
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Old 12-21-2009, 01:38 PM   #11 (permalink)
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The cowling under the handle bars needs to come off and the fuel pump is right there.
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Old 12-22-2009, 05:32 PM   #12 (permalink)
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Thanks to you all.

I got the cowling off and its defiantly the fuel pump that's making the noise.

Seems the fuel pump is directly underneath the handle bar post. Whats the next step... to pull the seat and then the tank back or do you take off the handlebars and unbolt the steering to move it out of the way... to get the pump out.

Also do you guys have a favorite supplier for a new pump?

Thanks. JLC
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Old 12-23-2009, 09:50 AM   #13 (permalink)
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On yours it would be easier to pull the seat and tank to get the pump out.
Take the pump to an auto parts store and get another one. (it's a mitsubishi pump)
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Old 12-23-2009, 12:09 PM   #14 (permalink)
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Thanks... ummm the seat, I hope its not bolted from underneath as my machine is sitting in my yard in 2 feet of snow.
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Old 12-23-2009, 01:26 PM   #15 (permalink)
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2 bolts in the trunk and it should slide back and off.
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'90 Wildcat Project in progress.

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1980 Indy Trail 440 (for sale)
1980 AC Pantera (donor engine to the 90 wildcat)


http://www.dcdrifters.net/


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Old 12-23-2009, 01:44 PM   #16 (permalink)
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OK will go out and look, thanks for all the help.
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Old 12-23-2009, 04:00 PM   #17 (permalink)
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I would be tempted to unplug the fuel pump, reverse the wire polarity so it runs in reverse and see if it sounds better or dislodges something, then reconnect it properly and take it for a test run.
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Old 12-24-2009, 07:07 AM   #18 (permalink)
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JLC.. if your sled at one time had electric start. there is a fuseable link in the starter/solenoid circuit. Make sure this fuse is good or your battery won't charge. I ran into this problem last year. My starter was dragging and it blew the fuse and I used the recoil start. After a few times of the sled quitting on me I replaced this fuse, been working fine since!
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Old 12-24-2009, 02:24 PM   #19 (permalink)
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JLC.. if your sled at one time had electric start. there is a fuseable link in the starter/solenoid circuit. Make sure this fuse is good or your battery won't charge. I ran into this problem last year. My starter was dragging and it blew the fuse and I used the recoil start. After a few times of the sled quitting on me I replaced this fuse, been working fine since!
OK I will... but should not the sled start if its hooked directly to a charger? I could see the battery not being charged after its running..... and then the battery running low..

But if the battery is good, and there is a charger on it (a charger-booster, then if evey thing was normal, it would start right?
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Old 12-24-2009, 02:59 PM   #20 (permalink)
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OK I will... but should not the sled start if its hooked directly to a charger? I could see the battery not being charged after its running..... and then the battery running low..

But if the battery is good, and there is a charger on it (a charger-booster, then if evey thing was normal, it would start right?
Mine wouldn't I had to leave it on the charger for about 1/2 hour before it would start. I also read somewhere to disconnect the battery before connecting a charger or it could damage the ECU. There is a couple fuseable links near the battery (at least on the 93 & 94 - 550 Pantera EFI) an older style fuse (glass cylindrical with metal ends) this is the one that must be good to recharge your battery. There is another newer style (20 amp yellow blade style) in this immediate area as well. Hope some of this helps.
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