Fuel tank replaced - question

For headaches I'm not going to explain I had my entire fuel tank replaced.

The past 20 tanks I've been getting between 11 and 12.5 gallon fills, one time 12.9, and mileage has been around 480-580, depending if it's heavy city or easy open roads.

Now after replacement, I can only manage 10 gallon before the back pressure trip, , sometimes 10.5 before I get spills trying to top it off.

And I'm only getting 420-450 miles of open driving!

I'm running the gauge where's its tipping the extreme empty mark as well, and still cannot get my traditional 11gallon easily fills...

Any ideas? Google is only showing one tank size 13.something.

All I can really do to verify if the float is bent is to run it out of fuel, but that's not a good practice with an injector pump....

Besides that, it's a smaller tank..


Edit

I haven't hooked up vcds since I've gotten it back. Without digging into the ecm could there be a reset or calibration?

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Oh, well there is a vcds calibration that will move the working range in regards to fuel level.


I got angry and had to rant apparently.

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Did you code the tank calibration? if so what did you use for the security code? All the ones I found didn't work.

I have not yet. I discovered it's possible this morning, and I'll just assume this **** hole dealer didn't even look into it.

Plugged in Wire harness, hoses and called it good.

I found one I'll try later. If you beat me to it share if it didn't work, and keep looking

20103

I'll also share the loads of codes that I'm sure are stored in the ecm to share the quality of this fukuship.

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https://www.golfmk7.com/forums/showthread.php?t=28818

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Code works, but only a few random values are accepted, and I don't get consistent results with what I expect with what's entered...

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-3.8 moves me from full dot on to a fuzz over 7/8 tank.



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I guess I'm not sure if I should do this when near empty, or nozzle back pressure full, or?

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Thanks I'll see if that code works for my AT, i can't remember which one I tried.

I also hate that I can't get more than 13 gal into a 15.5 gal tank, the wife hates driving any where once the light comes on.

15? Is yiyr tank larger or replaced with other?

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Alltrack, I dream it's a TDI and hang out here, but it's still a mk7 so many of the issues you guys have are shared across the platform.

Only a handful of times have I hit 400miles on a tank, 29-30MPG sucks big time, especially when it's begging for fuel and you can only add 13 gallons.

Ha. I was associating at for automatic transmission.

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5Q0201060CK

That's what they installed.

Vcds before and after.

11.754 gallon.

Where's the 13.6 as advertised?


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Can anyone confirm that part # in regards to tank size?

Google pulls up nothing

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https://www.quirkparts.com/oem-parts/volkswagen-fuel-tank-5q0201060ck

Looks like it's the same for Golf and GSW.

Not that it lists the size, but how tight everything is with the DEF tank, and how limited a run the 2015 had, I can't imagine there being multiple part numbers listed for for the GSW.