98 600 EFI Powder Special Boggin and Backfiring - Snowmobile Forum: Your #1 Snowmobile Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 12-30-2009, 09:49 PM Thread Starter
Registered User
 
Join Date: Dec 2009
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
98 600 EFI Powder Special Boggin and Backfiring

Hi Everyone, I hope maybe some of you have seen this problem and have some suggestions. First a bit about the sled... bone stock, motor has about 800 miles on it, new clutch last ride ... last winter. At just above an idle util about 30-35 mph ( rpm's don't seem to matter ) the sled will bogg and backfire or just flat quit for a second or so throwing you onto the windshield. Last winter everyone was convinced it was the clutch so I saved up and bought a new one and put a new belt. Everything seemed good, but it was one of those WOT days. Now they have it up in McCall and can't even ride it on the trail. I'm not sure if its a fuel issue or maybe coil.... anyone had this problem?

Thanks!

TecCrash

'98 Powder Special 600 EFI
TecCrash is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 12-31-2009, 04:07 AM
Super Moderator
 
kccats's Avatar
 
Join Date: Dec 2006
Location: Northern IL
Posts: 21,299
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 28 Post(s)
It could be as simple as a kill switch being intermitant, Or fuel presure regulator to high (will run at WOT!)
kccats is offline  
post #3 of 6 (permalink) Old 01-04-2010, 03:01 AM Thread Starter
Registered User
 
Join Date: Dec 2009
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I'm pretty sure I'm good on the kill switch, but I plan on figuring out how to check the fuel pressures and the regulator when I get back home. Any idea where I can get the specs on pressures and the dead headed pressure for the regulator?

Thanks!

TecCrash
TecCrash is offline  
post #4 of 6 (permalink) Old 01-04-2010, 03:02 AM Thread Starter
Registered User
 
Join Date: Dec 2009
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Also I would think that there is at least one fuel filter in the system, but my Cat dealer can't find it and neither can I on any of the micro fiche sites I have. Any ideas?

Thanks!

TecCrash
TecCrash is offline  
post #5 of 6 (permalink) Old 01-04-2010, 03:50 AM
Super Moderator
 
RJ Gleason's Avatar
 
Join Date: Feb 2005
Location: Groton NY
Posts: 33,371
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Fuel pressure should be 36.2psi,+/- of 5%.
The filters are included as part of parts # 27-28, Fuel pickup, front/rear.
There are no inline fuel filters.

Old Cat Rider
'93 Wildcat 700EFI
w/ Comet 108 Pro-4 clutch & 01 ZR skid

http://www.dcdrifters.net/

Past Master; F&AM Dryden Lodge# 472
http://www.masonicdryden472.org/

Rules of this forum are strictly enforced!
RJ Gleason is offline  
post #6 of 6 (permalink) Old 01-04-2010, 05:57 AM
Registered User
 
Blaine1's Avatar
 
Join Date: Sep 2009
Location: Flushing, MI
Posts: 706
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by TecCrash View Post
Hi Everyone, I hope maybe some of you have seen this problem and have some suggestions. First a bit about the sled... bone stock, motor has about 800 miles on it, new clutch last ride ... last winter. At just above an idle util about 30-35 mph ( rpm's don't seem to matter ) the sled will bogg and backfire or just flat quit for a second or so throwing you onto the windshield. Last winter everyone was convinced it was the clutch so I saved up and bought a new one and put a new belt. Everything seemed good, but it was one of those WOT days. Now they have it up in McCall and can't even ride it on the trail. I'm not sure if its a fuel issue or maybe coil.... anyone had this problem?

Thanks!

TecCrash

'98 Powder Special 600 EFI
When a sled is bogging/cutting out and back firing it is not clutch related. You either have a fuel issue or more than likely a spark issue. Watch my "Diagnosing..." and my "Testing a stator.." video in my signature. It "sounds" like a bad TSS/kill switch, maybe a bad/dirty ground, possible shorted wires somewhere or your stator is starting to puke out. Your stator testing specs are 45 ohms and 450 ohms. Could be bad reeds, sheered timing key, compression issue..ect...but not clutch related.

Wanted: Dead Stators PM me.

Testing Cat triple stators
http://www.youtube.com/watch?v=Uzz2NZiw3fk

Stator Testing ZR/ZL 1998-1999 500 & 600 Carburated
http://www.youtube.com/watch?v=XM3m9i6uqSw

Stator Testing ZR/ZL 1998-1999 500 & 600 EFI
http://www.youtube.com/watch?v=jbxhExP-2P0

Stator Testing Early 1990's 700 & 580 EFI with the triangular 3 prong connector
http://www.youtube.com/watch?v=jbxhExP-2P0

Jumper wire bypass
http://www.youtube.com/watch?v=GPpzQL8J9ik
Blaine1 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Snowmobile Forum: Your #1 Snowmobile Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome