NefMoto > Technical > Diagnostics > A4 1.8t B6 Fueling Issues ; Fuel Pump Suggestions
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Author Topic: A4 1.8t B6 Fueling Issues ; Fuel Pump Suggestions  (Read 7673 times)
BlkSerialKilla
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That's Just The Nature Of The Beast...
« on: November 21, 2017, 09:07:22 AM »
Alright I've been working out problems getting my setup tuned with recent GTRS turbo install going and I thought I had fueling setup and well on, however I noticed that once I had increased requested load that my lambda control reaches 125% and AFR creeps up linear as pictured and attached in log. I have bosch 550cc injectors and had done the fuel filter last year and few months ago as regular maintenance so I'm suspecting that my fuel pump is not up to task or is getting lazy. Is this something anyone else has ran into? The fuel pump was done by PO at dealer around 90-100k miles and car currently has 198k.

If it is the fuel pump I was thinking of getting the DW65V but are there other solutions that would work that are better as far as cost and performance factored in?

http://www.deatschwerks.com/blog/dw65v-now-available-awd-audivw-applications
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KasperH
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« Reply #1 on: November 21, 2017, 10:41:43 AM »
DW65v should be able to supply enough fuel flow.
Another option would be an inline fuel pump (Bosch-044/Walbro 255)

Guides for doing these installs are all over the internet.
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vwaudiguy
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« Reply #2 on: November 21, 2017, 02:57:35 PM »
Consider converting to a return system?
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
BlkSerialKilla
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That's Just The Nature Of The Beast...
« Reply #3 on: November 21, 2017, 03:42:09 PM »
Quote from: vwaudiguy on November 21, 2017, 02:57:35 PM
Consider converting to a return system?

I probably would consider it if the fuel pump is ok up to task and this is a limitation specific to having a returnless fuel system instead. I would be able to head to my local junk yard and find a few 1.8t MK4s or 1.8t B5 A4s I can get components from if they would work  Smiley

Is this a returnless fuel system limitation?
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_nameless
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« Reply #4 on: November 21, 2017, 04:19:53 PM »
Quote from: vwaudiguy on November 21, 2017, 02:57:35 PM
Consider converting to a return system?

This
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Giving your mom a tuneup
KasperH
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« Reply #5 on: November 21, 2017, 10:11:36 PM »
Forgot to consider that you had a longitudinally mounted engine.
My bad Smiley

Yeah, return fuel system would be first on the list.
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BlkSerialKilla
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That's Just The Nature Of The Beast...
« Reply #6 on: November 22, 2017, 02:35:14 PM »
Well I went ahead and bought AEB fuel rail with fuel pressure regulator now to get MK4 fuel filter and fuel lines  Grin
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vwaudiguy
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« Reply #7 on: November 22, 2017, 04:37:42 PM »
Quote from: BlkSerialKilla on November 22, 2017, 02:35:14 PM
Well I went ahead and bought AEB fuel rail with fuel pressure regulator now to get MK4 fuel filter and fuel lines  Grin

Yay. Remember, you'll need to make changes to the fueling strategy after you're done.
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"If you have a chinese turbo, that you are worried is going to blow up when you floor it, then LOL."
BlkSerialKilla
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That's Just The Nature Of The Beast...
« Reply #8 on: November 22, 2017, 05:40:23 PM »
Quote from: vwaudiguy on November 22, 2017, 04:37:42 PM
Yay. Remember, you'll need to make changes to the fueling strategy after you're done.

I had found this earlier today http://nefariousmotorsports.com/forum/index.php?topic=460.0

Setting codeword CWPKAPP  and adjusting FRLFSDP ,and having flattened FKKVS is the way to go perhaps on initial read.
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_nameless
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« Reply #9 on: November 23, 2017, 06:02:49 AM »
the passat awm with return fueling software 018dn is the same offset as 518ak. compare between the 2 using the same map pack
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Giving your mom a tuneup
BlkSerialKilla
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That's Just The Nature Of The Beast...
« Reply #10 on: November 23, 2017, 04:13:07 PM »
Quote from: Marty on November 23, 2017, 06:02:49 AM
the passat awm with return fueling software 018dn is the same offset as 518ak. compare between the 2 using the same map pack

Awesome, Thanks!  Grin
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EuroXs4
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« Reply #11 on: January 01, 2018, 07:56:00 AM »
Quote from: BlkSerialKilla on November 23, 2017, 04:13:07 PM
Awesome, Thanks!  
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