water methanol issue on deceleration - Chevy and GMC Duramax Diesel Forum
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post #1 of 2 (permalink) Old 02-17-2016, 02:13 AM Thread Starter
 
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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.
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2015 3500 Denali, Deleted, EFI Tuning, Lift/leveled, 20" BMF Novakane, 33"duratracs, Edge Insight, pyro, Turbo timer, Snow Pro Water Meth, Amp Boards
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post #2 of 2 (permalink) Old 02-17-2016, 05:01 PM
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Location: Frankfort, Kentucky
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Move your solenoid as close as you can to the nozzle you are using. Inches away is preferable.
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