Artic Cat 1994 EXT 580 EFI Trouble

Artic Cat 1994 EXT 580 EFI Trouble

Post by Andrew Hah » Mon, 12 Jan 1998 04:00:00


I own an 1994 Artic Cat EXT 580 EFI and have been having plenty of trouble
with it lately.

What happens is it will be running great, and then suddenly it will start
running on only 1 cylinder.  At that point you only have a few seconds until
it totally dies.  No matter how many attempts at starting it up it just will
not run.  In attempting to get it to run again we have tried replacing
plugs, checking for loose wire, and even replacing the battery.

Anyway, the problem is strange because after letting it set for a week or
two and going back and trying it it works fine.  Starts on the second pull
or so and goes to work.

The stupid thing just decides to quit working for a while; after a few days
it's happy and works fine.

Anyone have any ideas as to what the problem is?

    Any help is appreciated...

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by David Chomi » Mon, 12 Jan 1998 04:00:00

Quote:

>I own an 1994 Artic Cat EXT 580 EFI and have been having plenty of trouble
>with it lately.

>What happens is it will be running great, and then suddenly it will start
>running on only 1 cylinder.  At that point you only have a few seconds
until
>it totally dies.  No matter how many attempts at starting it up it just
will
>not run.

  snip

Have you checked the error codes on the ECM when this problem occurs?  There
is a little window that has a small LED located on the right side of the
ECM.  When you turn the key on, count the number of flashes and check your
service manual (if you have one) or call your dealer.  If there is just a
single flash, the ECM is reporting everything is fine.  If you get a single
flash when this problem occurs, I would think that the EFI system is fine
and to look else where.  Hope this helps.

(remove the "!.nospam" for e-mail)

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by Andrew Hah » Mon, 12 Jan 1998 04:00:00

I own an 1994 Artic Cat EXT 580 EFI and have been having plenty of trouble
with it lately.

What happens is it will be running great, and then suddenly it will start
running on only 1 cylinder.  At that point you only have a few seconds until
it totally dies.  No matter how many attempts at starting it up it just will
not run.  In attempting to get it to run again we have tried replacing
plugs, checking for loose wire, and even replacing the battery.

Anyway, the problem is strange because after letting it set for a week or
two and going back and trying it it works fine.  Starts on the second pull
or so and goes to work.

The stupid thing just decides to quit working for a while; after a few days
it's happy and works fine.

Anyone have any ideas as to what the problem is?

    Any help is appreciated...

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by Jeff Bart » Tue, 13 Jan 1998 04:00:00

Quote:

> I own an 1994 Artic Cat EXT 580 EFI and have been having plenty of trouble
> with it lately.

> What happens is it will be running great, and then suddenly it will start
> running on only 1 cylinder.  At that point you only have a few seconds until
> it totally dies.  No matter how many attempts at starting it up it just will
> not run.  In attempting to get it to run again we have tried replacing
> plugs, checking for loose wire, and even replacing the battery.

> Anyway, the problem is strange because after letting it set for a week or
> two and going back and trying it it works fine.  Starts on the second pull
> or so and goes to work.

> The stupid thing just decides to quit working for a while; after a few days
> it's happy and works fine.

> Anyone have any ideas as to what the problem is?

>     Any help is appreciated...

 Get a dealer to check the error codes on the computer. I'd bet you have a bad
injector. It sounds just like my '96 when I had a bad injector.

-jeff b.

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by Evbo » Tue, 13 Jan 1998 04:00:00

I dropped my '94 EXT in a lake some years back and found my dealer totally
incompetent at troubleshooting the EFI system, so I bought a manual, diagnostic
harness, and meter and did it myself, ran better than it did before it went in
the lake.  if your in SE michigan I suppose you could persuade me to diagnose
it.
Evan B.  SE MI
'93 Indy 500 EFI SKS
'94 580 EFI mountain cat
'98 powder special EFI
bunch of old sleds VSCA member

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by westo » Thu, 15 Jan 1998 04:00:00

Quote:

> > I own an 1994 Artic Cat EXT 580 EFI and have been having plenty of trouble
> > with it lately.

> > What happens is it will be running great, and then suddenly it will start
> > running on only 1 cylinder.  At that point you only have a few seconds until
> > it totally dies.  No matter how many attempts at starting it up it just will
> > not run.  In attempting to get it to run again we have tried

Jeff-

My buddy owns a Polaris 500 EFI that was doing the exact same thing and
it turns out that he had sqeaked a piston.  You might want to check the
compression on it to see if this might be your case. It would run
allright until it got warm and then quit and not start.

Good luck
Weston

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by DirtSnoH » Fri, 16 Jan 1998 04:00:00

I had a problem like this once.  It was a bad ignition switch.  If you don't
find anything else, you might try replacing this.
-Don

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by DirtSnoH » Fri, 16 Jan 1998 04:00:00

I had a problem like this once.  It was a bad ignition switch.  If you don't
find anything else, you might try replacing this.
-Don

 
 
 

Artic Cat 1994 EXT 580 EFI Trouble

Post by Craigbr » Fri, 16 Jan 1998 04:00:00

Evan,
I too have a 98 Powder Sp EFI.  It sound like you played around with the tuning
of Cats EFI.  I hope you can help me; I'm interested  in the specs/setup
procedure for the Throttle Position Sensor on my EFI.  I checked the resistance
from the TPS with it connected  to the computer(used small pins through the
wires), engine off.  It read 770 ohms at idle, up to 1700 at about 3/4
throttle, and gradually back down to 1550 ohms at full throttle(this seemed odd
to me).  I didn't disconnect the wire because I was afraid that might put an
error into the computer, than I would have to go to a dealer to get it
cleared.(the dealer told me once an error is in the computer, it can only be
cleared with the analysis box that dealers have).  I think the TPS is the key
to milage and good throttle response.  If the factory didn't make this setting
as carefully as they should have, it could be the reason some sleds are "rich
pigs", some ok, and some burning up???

Thanks,
Craig