Vapor canister replacement - Hemi Truck Club
 
Go Back   Hemi Truck Club > Technical Forums > General Repair Forum

Like Tree2Likes
Reply
 
Thread Tools Display Modes
 
Old 04-27-2018, 05:51 PM   #1
Senior Member
 
Sleeperhemi's Avatar
 
Join Date: Feb 2008
Location: Waldorf, Maryland
Posts: 144
Garage
Vapor canister replacement

Hi folks! Hopefully someone has some good news for me. Long story short....been fighting a P0457 code for quite a while now. So far I have replaced a gas cap, purge valve, NVLD and o-ring, every hose on top of the gas tank(clamped any without quick connects). Inspected all the plumbing all the way up to the engine as well. Had the system smoke tested and no leaks were found. The shop cleared the codes, CEL stayed off the entire day until yesterday morning.....TADA...P0457. Last thing to replace is the charcoal canister. Anyone know if that can be removed easily or is this a "bed off" or drop the tank deal? Replacing it on my 2011 Ram 1500 crew cab 4WD with the 26 gallon tank.....any info would be greatly appreciated. Thanks!

Sleeperhemi is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-27-2018, 07:58 PM   #2
2012 Truck of the Year
Engine Specialist
 
charged392's Avatar
 
Join Date: May 2011
Location: Fort pierce, FL
Posts: 17,273
Garage
Most times that code is for the NVLD switch but if that’s new then that’s not the issue. Who smoke checked it? Did they test the entire system from the purge valve upfront all the way to the rear? This system is not like the older stlyes it requires pluggin off the vent valve in the rear. If they tested it correctly the machine will show no flow on the flow table did they get a no flow condition and I mean ball steady not vibrating?
__________________
"CMR TUNER" [email protected] 1/4 with a 7.32 1/8 custom long/short bars by "Me" Turbocharged 392 on 9psi S475/96/1.32 . Running thru an A518! [email protected]
charged392 is offline   Reply With Quote
Old 04-27-2018, 09:36 PM   #3
Senior Member
 
Sleeperhemi's Avatar
 
Join Date: Feb 2008
Location: Waldorf, Maryland
Posts: 144
Garage
Thank you for your response! It was smoked at a very reputable shop in my area....rather large shop with all the latest and greatest. Been going there for years and never once had an issue, I trust them. The tech who always handles my vehicles said he smoked it front to back....then back to front and found no leaks. opened the purge via scan tool and functioned well. Didnt mention anything to me about flow conditions......not saying he didnt see that on his machine....just didnt say anything to me. They had my truck for 8 hours and couldnt find anything. Also, the nvld i replaced is the 2nd replacement. First was from a parts store......i just replaced it again with an oem dealership part including new o-ring.
Sleeperhemi is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 04-28-2018, 08:07 PM   #4
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,105
Garage
Replacement gas caps can be problematic at best. Long ago when I had leak problems I replaced the cap several times before finding one that actually sealed. You can use vaseline on the rubber seal to help seal the cap. The nvld hoses and clamps can be a problem but have smoke tested, you've replaced the nvld. This could be electrical. The plug/wiring and I remember there is a 5v monitoring circuit provided by the pcm to monitor the nvld circuit to test to see if the nvld is plugged in. Probably need a scanner to check that. Good luck..
Sleeperhemi likes this.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1956 Jeep Pickup Hemi powered "Street Rod project"

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is offline   Reply With Quote
Old 04-28-2018, 10:38 PM   #5
Senior Member
 
Sleeperhemi's Avatar
 
Join Date: Feb 2008
Location: Waldorf, Maryland
Posts: 144
Garage
And you called it right. Was underneath the truck today checking over everything again and what do I find way out of my reach? A chewed thru wire coming off the nvld connector.Conveniently I can barely see it, top side of the tank just inside the frame where another wire harness runs....took the wheel well liner out, still cant get it. Back to the shop we go.
Sleeperhemi is offline   Reply With Quote
Old 04-28-2018, 11:16 PM   #6
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,105
Garage
Time and time again I find the owner catching the problem when the shop misses it. Well done...
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1956 Jeep Pickup Hemi powered "Street Rod project"

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is offline   Reply With Quote
Old 04-29-2018, 07:27 AM   #7
2012 Truck of the Year
Engine Specialist
 
charged392's Avatar
 
Join Date: May 2011
Location: Fort pierce, FL
Posts: 17,273
Garage
It happens but they deff should have seen that with a scanner monitoring pressure during test. Emmisions tests are a real pain in the but you have to be really thorough when doing those tests as just about anything can trip that light.
__________________
"CMR TUNER" [email protected] 1/4 with a 7.32 1/8 custom long/short bars by "Me" Turbocharged 392 on 9psi S475/96/1.32 . Running thru an A518! [email protected]
charged392 is offline   Reply With Quote
Old 04-29-2018, 08:27 AM   #8
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,105
Garage
I believe a device can be plugged in to replace the nvld and trick the pcm using a resister and relay. Basically the resister would simulate the nvld internal switch (relay) and the external relay would replace the nvld sensing tank pressure. It's been years since I wrote the posting, but it's buried somewhere no doubt. If interested, go through the service manual and review the nvld wiring circuit.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1956 Jeep Pickup Hemi powered "Street Rod project"

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is offline   Reply With Quote
Old 04-29-2018, 03:31 PM   #9
2012 Truck of the Year
Engine Specialist
 
charged392's Avatar
 
Join Date: May 2011
Location: Fort pierce, FL
Posts: 17,273
Garage
That is 100% not a possibility lot the new switch is in no way a sealing device. The nvld now uses tank temp and natural gas expansion and contraction of the fluid along with a time period to test for leaks. Smoking them is to find leaks but 90% of the diag to this new system is the electrical side of things. Fix the wire and let’s hope it’s done after that.
__________________
"CMR TUNER" [email protected] 1/4 with a 7.32 1/8 custom long/short bars by "Me" Turbocharged 392 on 9psi S475/96/1.32 . Running thru an A518! [email protected]
charged392 is offline   Reply With Quote
Old 04-29-2018, 05:33 PM   #10
Greg
 
Redtruck-VA's Avatar
 
Join Date: Jan 2011
Location: Virginia
Posts: 19,105
Garage
Quote:
Originally Posted by charged392 View Post
That is 100% not a possibility lot the new switch is in no way a sealing device. The nvld now uses tank temp and natural gas expansion and contraction of the fluid along with a time period to test for leaks. Smoking them is to find leaks but 90% of the diag to this new system is the electrical side of things. Fix the wire and letís hope itís done after that.
Keith you know my knowledge base is centered around 03 model rams. This was the first year the nvld was used with rams. I deconstructed the system years ago and have no idea what the geniuses have now come up with. Off the top of my head the circuit uses natural expansion within a sealed tank. The pcm does event timed test first looking to see if the device (nvld] is plugged in and then whether (test) there is internal tank pressure needed to close a switch (nvld). The federal emssions controls usually work at two levels. 1st for the pcm to confirm the device is operating and 2nd for the emission device to detect a condition be it electrical reading, pressure , temperature or vacuum.
To categorically call bs without an explaning doesn't provide any information and is frankly rude. We are all here trying to help our hemi community.
__________________
2003 RCSB, 2wd, "Pro-Street"
6.4L/cog driven V7-Ysi/46rh trans/HTH Truckarm coilover suspension. HP Tuning...

1956 Jeep Pickup Hemi powered "Street Rod project"

1# 2017 HTC FASTEST HEMI List....
Current 1/4 mile [email protected] (2018)
Current 60' PB 1.351 (2019) mechanical issue for 1/4m

HTC 2018 TOTY

Support vehicle- 2007 QC G56 4x4 diesel
Redtruck-VA is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 Off
Pingbacks are Off
Refbacks are Off


» Premium Vendor Showcase
n2 Speed Edge InTune Edge OCPerformance Parts

All times are GMT -6. The time now is 04:13 PM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.