Upgraded fuel metering valve

jetmechanic91

Member
Joined
Apr 22, 2023
Location
NC
TDI
2010 A3
Good morning. Shoutout to all the posters on here. Lots of good information. First time posting. Havnt seen much information on people upgrading their fuel metering valves. Reason I am currently in this fuel rabbit hole is I have had a 0088 (High FP) code a few times - with no metal present in the system. I know darkside and a couple other vendors are/were selling an upgraded version of our fuel metering valves. Less restrictive. Has anyone got any solid information on using GM part n 12641035 - duramax valve. 90 degree cannon plug fitting type. Ive only found a few people on facebook using it and some claim certain vendors have essentially taken this 100$ part and upsold it on their website. (dont hate the player hate the game lol)

Anyway, I was hoping for some fellow tdi owners testimonies on this valve?

Thanks
 

tjg

Veteran Member
Joined
Feb 8, 2019
Location
Ft. Hood, TX
TDI
'13 TDI A3, '14 TDI Sportwagen
You might want to take a look at a few of the threads on the MKVI sportwagen subforum. Theres tons of relevant information there.

Any reason for going with an upgrade on the CP4 metering valve and not going to like a stage 2 CP3 (darkside has upgraded ones).
 

jetmechanic91

Member
Joined
Apr 22, 2023
Location
NC
TDI
2010 A3
You might want to take a look at a few of the threads on the MKVI sportwagen subforum. Theres tons of relevant information there.

Any reason for going with an upgrade on the CP4 metering valve and not going to like a stage 2 CP3 (darkside has upgraded ones).

No metal present, def keeping a close eye on it. Car has 650 miles on it since swapping in a new fuel metering valve (stock part) with zero CEL. Just curious about the GM metering valve. Only have found one facebook thread on it so far figured I would see if anyone else has used one.
 

Mk7karl

New member
Joined
May 9, 2023
Location
Derby
TDI
Gtd
Any luck with the metering valve, I’m also looking one as I have reached the limit of the pump and just need abit more out of it, I seen the one on darkside and I can’t work out if it one they have modified or it’s just one from a different car.. so I have been looking and only one I can find that abit bigger than the cp4.1 is the cp4.2 but clearly the one they have most be bigger than that as it’s a upgrade for the cp4.2 too🤷‍♂️ so a part number would really help ?
 

jetmechanic91

Member
Joined
Apr 22, 2023
Location
NC
TDI
2010 A3
couple thousand miles later (i commute 200 miles a day 4x a week) and no faults. Hopefully I didn't just jinx it by making this post, but so far ive had success with that larger metering valve keeping away 0088 code
 

borninabus

Veteran Member
Joined
Feb 18, 2020
Location
Arizona
TDI
-2013 JSW 6MT- -2006 Jetta DSG-
any advice on the different plug?
i have in my hand the amazon link from above & both it & the darkside units have a different plug
 

jetmechanic91

Member
Joined
Apr 22, 2023
Location
NC
TDI
2010 A3
From memory - had to remove the purple clip and slightly trim the tabs. And I believe you plug it in upside down from stock.
 

Mrrogers1

Veteran Member
Joined
Jun 25, 2006
Location
Omaha NEEEBRASKA
TDI
2011 Golf TDI 6MT, 2011 Jetta TDI DSG, 2015 Golf Sportwagen S TDI DSG
What I'm wondering is if this part is one of the "upcharged" versions the OP was talking about Thoroughbred Diesel Energy Fuel system saver AND if they actually protect from a CP4 completely $hitting the bed like the 2Micro containment kit OR the newly released, 2023/24 version of it from Whitbread. :unsure:
 

borninabus

Veteran Member
Joined
Feb 18, 2020
Location
Arizona
TDI
-2013 JSW 6MT- -2006 Jetta DSG-
it does not appear to be the standard GM sensor
my OE GM sensor is doing fine after a couple months, 2k+ miles

i swear the engine seems a little more torquey down low
 
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Mrrogers1

Veteran Member
Joined
Jun 25, 2006
Location
Omaha NEEEBRASKA
TDI
2011 Golf TDI 6MT, 2011 Jetta TDI DSG, 2015 Golf Sportwagen S TDI DSG

danmin

Veteran Member
Joined
Oct 6, 2023
Location
DFW
TDI
2014 Passat 2.0 TDI @ 180k
Installed and I noticed that I blow way more black smoke… not sure how. And I can feel a little torque too, could be placebo.
 

MrCypherr

Veteran Member
Joined
Sep 3, 2012
Location
Ontario
TDI
Mk6 Wagon
If youre blowing more black smoke than you were before, then you're dumping more fuel than before. Was anything else changed besides the valve?
 

GolfSW98

Veteran Member
Joined
Feb 8, 2021
Location
Texas
TDI
2015 GSW TDI
I am interested in this part. But hearing about the black smoke makes it seem as if this metering valve will increase fueling slightly... increasing power. Is that what's happening?
 

danmin

Veteran Member
Joined
Oct 6, 2023
Location
DFW
TDI
2014 Passat 2.0 TDI @ 180k
Smoke occurred when driving regularly for a little bit and then flooring the pedal. Put out a little puff. Racing it on the highway puts out a little bit of smoke as well. Made a custom intake and it stopped smoking. Assuming the extra air let the fuel get burned. Wasn’t like I was rolling coal or anything.
 

GolfSW98

Veteran Member
Joined
Feb 8, 2021
Location
Texas
TDI
2015 GSW TDI
So it only smokes slightly when you go from a light load to a high load condition (stomping pedal), or when at max hp output and you might be a bit low on air to fuel ratio.
So it seems like this GM part is a ported version of the stock valve which lets more fuel into the rail, maintaining rail pressure more effectively. Sounds like a for sure 5hp/tq minimum bump. Thanks for the info. So the part should fit on most of the 2.0 tdis with the cp4.1?
 

danmin

Veteran Member
Joined
Oct 6, 2023
Location
DFW
TDI
2014 Passat 2.0 TDI @ 180k
So it only smokes slightly when you go from a light load to a high load condition (stomping pedal), or when at max hp output and you might be a bit low on air to fuel ratio.
So it seems like this GM part is a ported version of the stock valve which lets more fuel into the rail, maintaining rail pressure more effectively. Sounds like a for sure 5hp/tq minimum bump. Thanks for the info. So the part should fit on most of the 2.0 tdis with the cp4.1?
If you follow the instructions listed above yeah. Remove purple clip inside of GM valve. and grind down edges of GM plug. Clicks right in.
 

GolfSW98

Veteran Member
Joined
Feb 8, 2021
Location
Texas
TDI
2015 GSW TDI
Having trouble figuring out whats tabs to sand.

edit: Removed the purple insert on the car harness connector, and plugged it in upside down. Then shaved the new cp4 metering valve connector until it fit like a glove. Seems to work, maybe a minor bump in power but smoother delivery.
 
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