water methanol issue on deceleration - Chevy and GMC Duramax Diesel Forum
Propane/Nitrous/Meth Discuss all your propane/nitrous/meth stuff here.

LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 02-17-2016, 03:13 AM Thread Starter
Tonka911's Avatar
Join Date: Jan 2015
Location: Van Island, B.C, Canada
Posts: 9
water methanol issue on deceleration

Ok, so i have a snow performance max mpg set up in my 2015 lml.... its only ever used on tow mode, for towing the gooseneck. works awesome as far as getting more power and keeping EGTs down.
Only issue I'm having is after pulling a hill or other high boost scenario where its dumping lots of water/meth.... If i back right off the throttle after getting to the top of hill, engine starts to rattle/knock for a few seconds and then goes away.... if i ease off the throttle over say 5-10 seconds then there is no issue.

Two possible causes that come to mind are that,
A: as my boost sensing line for the controller is located after the injection ports in the inlet pipe, it is causing a delay or false boost reading to the controller, thus delaying the stop of injection.

B: My main water/meth solenoid valve is located further back on truck by the fuel tank and water/meth pump. when the controller shuts solenoid valve, water/meth continues to flow out of injection nozzle as the 6+ feet on line still has residual pressure. ...... my secondary solenoid valve for max injection is located in engine bay with short amount of hose.

Any thoughts on this would be greatly appreciated.
Attached Images
File Type: jpg IMG_1898.jpg (73.0 KB, 21 views)

2015 3500 Denali, Deleted, EFI Tuning, Lift/leveled, 20" BMF Novakane, 33"duratracs, Edge Insight, pyro, Turbo timer, Snow Pro Water Meth, Amp Boards
Tonka911 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 02-17-2016, 06:01 PM
Junior Member
Join Date: Nov 2010
Location: Frankfort, Kentucky
Posts: 163
Send a message via Skype™ to dust
Move your solenoid as close as you can to the nozzle you are using. Inches away is preferable.
dust is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Chevy and GMC Duramax Diesel 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:


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