Dpm - Snowmobile World : Your #1 Snowmobile Forum

LinkBack Thread Tools
post #1 of 5 (permalink) Old 11-22-2002, 05:30 PM Thread Starter
Senior Member
paidncash's Avatar
Join Date: Oct 2002
Location: Chazy, NY
Posts: 677
Send a message via AIM to paidncash
I'v heard some people where i ride talking about unhooking there dpm because it slows them down. I don't understand how dpm can make there sleds slower, isn't it suposed to improve your jetting and make your sled run better. Am i missing something here or what, this doesn't make sense to me.

There is a thin line between fishing and a man standing on shore.
paidncash is offline  
Sponsored Links
post #2 of 5 (permalink) Old 11-22-2002, 07:38 PM
Senior Member
Join Date: Sep 2001
Posts: 400
I've had good success with the DPM with the round slides.

For the flats, I've heard they are very inconsistent. A good
tuner can tune the sled to be spot on (for the ski-doos
I want my EGT's to be 1225 - 1250) for the day. For DPM's,
on a given day, temp, elevation, etc. the EGT's may not
be there, even though you jetted it there the week before.

If you are dragging the sled, 1150 to 1250 makes a difference
in performance.
Gunner is offline  
post #3 of 5 (permalink) Old 11-23-2002, 07:15 PM
Senior Member
Join Date: Sep 2002
Location: WA
Posts: 720
I've pulled it off and on for various reasons. The enleanment solenoid was sticking on me, when it was stuck closed it would blubber rich and use lotsa fuel. When it stuck open it the idle would hang lean and it would run (too) crisp on top. Anyone who says it cannot fail lean doesn't know what they're talkin about. Cleaning it fixed it but I didn't trust it so I pulled it off. Later in the season I bought a new solenoid because I got tired of jetting for every trip, it's been working ever since, sealevel to 9000'. When I was manually jetting I think I was pushing a little closer to the edge and the sled usually ran a bit crisper and used less fuel. my .02
hillpounder is offline  
post #4 of 5 (permalink) Old 11-24-2002, 12:09 AM
Senior Member
Trapper's Avatar
Join Date: Nov 2002
Location: Michigan
Posts: 215
The DPM unit is very reliable. Very seldom have I seen one go bad. The original version had two solinoids, one for enrichment (presurizeing the float bowl) , and one for enleanment (pulling a negitive preasure on the float bowl). Nowdays the DPM only has one function, which is enrichment.
There is no need to fool around and disconnect the DPM unit unless your doing something like summer grass dragging.
Also, be warned that there is more to defeating the DPM than simply unplugging the sensor or pulling off the tubes.(take my word for it...this one goes in the "been there/done" that column.)
Keep in mind that the DPM system, according to ski-doo, doesn't operate in temps. above 40 degrees, in which case you'll be running fat. A sometimes quick fix instead of fooling with jets is to remove the foam pre-filter (the one behind the windshield). This is worth almost one jet size.

"Growing old is mandatory...Growing up is optional"
Trapper is offline  
post #5 of 5 (permalink) Old 11-24-2002, 06:18 AM
journeyman sled/motorhead
dooman's Avatar
Join Date: Mar 2001
Location: Indiana/Irons michigan
Posts: 4,440
Send a message via Yahoo to dooman
one function"enrichment" ,false ,dpm leans the mixture out not the other way around.

dooman is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Snowmobile World : 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:
Please enter a password for your user account. Note that passwords are case-sensitive.


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

Email Address:


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

Posting Rules  
You may not post new threads
You may not 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