94 Arctic Cat ext 580 EFI - Snowmobile Forum: Your #1 Snowmobile Forum

kevinscof · 04-08-2008, 06:41 PM

I just bought one and it runs but it does some weird things. When you start it sometimes it will only idle (it will idle for a couple minutes then die) and if you hit the throttle it dies right away. After several restarts it runs fine. It will take off and run normal. I was wondering if there is any adjustments I can play with to try to rectify this.

**RJ Gleason** · 04-09-2008, 10:46 AM

Before you pull it over, but after you turn on the key, do you touch the throttle at all?
You are supposed to move the lever to WOT and let it snap back prior to starting it for the first time to set the TSS/TPS test in the ECU.

kevinscof · 04-09-2008, 10:54 AM

I have tried both hitting the throttle once and then start it and not touching it. It does start on the third pull almost 99% of the time. I was thinking it was a fuel issue so I pulled the fule pump and everything out of the tank. The fuel pump is coming on and pressuring up when the key is turned on. It runs for about 5-10 seconds and stops after it reaches the pressure. I have a 94 wildcat mountain cat 700 EFI. Will the EFI unit on it work on this one? If so I was thinking about swapping them and see if it is it causing the issues.

**RJ Gleason** · 04-09-2008, 11:02 AM

You will also need to change the injectors as well to match the ECU chip.

**kccats** · 04-09-2008, 11:13 AM

Great trail sled by the way! Try once it starts to hit the Kill switch, then restart it! My 95 Pantera does that too! Somehow it resets the computer!

kevinscof · 04-09-2008, 02:00 PM

The kill switch or the key? ok I will try that tonight and see what happens. Heck ya I figured it would be good for my daughter to play on. I picked it up for $500 from a kid here in town.

**kccats** · 04-10-2008, 10:42 AM

Have you driven it much? That 580 is fairly pottent! I'd say atleast 90 hp and it is capable of atleast 90mph! Be carfull turning just anyone loose with it!

kevinscof · 04-10-2008, 11:45 AM

yes I have. I have another 580 ext exactly like it except it isnt EFI. They do run very well. My girlfriend has a jag 440 that my daughter usually rides but I dont know if she will let it go and take the 580 yet. She really likes it cause it is so small and lite and easy to handle. But I figured for the price I couldnt go wrong at all.

SShooterZ · 04-10-2008, 12:06 PM

That's a nice price for sure! Well done.

kevinscof · 04-10-2008, 02:30 PM

thanx shooter, I thought so also.

**kccats** · 04-10-2008, 03:41 PM

Absolutly! I have said for years that the ZR580 EFI is the Best first sled! I just put together a 98 EXT 580 EFI and I gave $600 for it without a motor, and so far everyone that has riden it just loves it, some maybe even more than my 98 ZR 600 Mod!

kevinscof · 04-10-2008, 03:50 PM

Ya my brother has a 96 zr 580 efi and that thing flat out runs. Thats why I got the other 2 580s was cause of my brothers. We have been trying to find a wrecked or blown up sled with a long track so I can convert it and put a long track on it. Im betting it would be a monster in the powder with a good track on it.

SShooterZ · 04-10-2008, 03:58 PM

Glad to hear you guys say that as I'm in the process of adding some "features" to my '96 EXT EFI.

Sled definitely has the giddyup to get out, just needs a little "refinement".

paintballdude05 · 04-10-2008, 10:10 PM

Just to put it out there I got bassicly a whole '96 580 EFI sled in parts waiting for some buyers. If you need parts PM me. BTW kinda sounds like either a stator or a throttle safety switch.

kevinscof · 04-11-2008, 11:31 PM

well tonight I was messing with the injectors. And when I moved them it would take off and run good. SO i removed the injector assembly and the rubber seal on the one injector was gone. I will be getting a new one in the morning to see if that was the issue. Im sure it is cause it would be sucking air around the injector.

**kccats** · 04-12-2008, 09:06 AM

EEWW that wouldn't be good! So you think the injector seal where it goes into the throtel bodie (oring?) is causing it not to idle, then clears up as you gass it? I was thinking the opposite, that it was getting too much fuel? At least thats how mine feels? Keep us posted on this I may have to pull my injectors to have a look!

kevinscof · 04-12-2008, 10:02 AM

no it is acting the opposite. It will start and idle but as soon as you hit the throttle it dies. I had my brother moving them around and messing with it and when he holds it just right it will accellerate correctly. I will know here in about two hours when the sled shop opens up and I can get my new insulator.

**kccats** · 04-12-2008, 03:21 PM

Insulators? Are we talking about the electrics or the intake side of this?
I guess I'm confussed, don't laugh I'm getting old and it don't seem to take much anymore! So when you start it it idles fine, but dies when you touch the throtle. Mine starts and tries to idle but dies on it's own. If I start it and hit the kill switch and restart it it seems to be fine, and this is usualy only the first cold start. Please keep me / us posted on what you find!

kevinscof · 04-14-2008, 10:52 AM

LOL thats OK. Yes it is the insulator that goes on the injector where the injector goes into the throttle body. I put one in and now it is running top notch. It is just a little rubber gorment that seals the seat of where the injector goes in. But ya it would start up and idle for a little bit then die. It would die immediately when I touched the throttle on it. Since I put the rubber seat in it starts and runs good everytime.

StevoArticCat · 02-11-2009, 09:55 AM

i got a question about my 1996 Artic Cat 580 EXT and i thought u guys would be the ones to ask!

i donno if this has to do with the carbs or the amount of feul getting to the carbs or the plugs but everytime i start my sled from a stand still and try to grab a handfull it doesnt accelerate fast it stays at like 4500 revs and stays there until it eventually picks up. and it does this anytime i slow down also and try to speed up again. but if i gradually accelerate it hits that power band like no other!! but i cant grab handfulls whenever i want to.... what do u guys believe the problem is??