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TDI Conversions Discussions on converting non TDIs into TDIS. More general items can be answered better in other sections. This is ideal for issues that don't have an overlap and are very special to swaping engines.

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Old May 8th, 2019, 13:52   #1
nezhinskyt1
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Default 2.0l cr(cjaa) tdi swap into 2008 audi a4 b7 questions??

I have a 2011 vw golf wagon with a cjaa 2.0l cr tdi and i would like to put it into my 2008 audi a4 b7 quattro 2.0 tfsi.


My question is how do i mate the two wiring harness and get the cjaa ecu to communicate with the Audi, and the stock gauge cluster.
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Old May 8th, 2019, 14:09   #2
Owain@malonetuning
 
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VW's main tech website will have all the wiring diagrams you'll need, could log on for a day and download the lot.

https://erwin.vw.com/

You might be best off purchasing a month subscription to use the iwire feature rather than just downloading all the PDFs, but either way will want to pull some spreadsheets from the data for all your pinouts since the way the factory lays it out will have you sifting between pages to trace wires.
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Old May 8th, 2019, 20:54   #3
jetta ,97
 
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Quote:
Originally Posted by nezhinskyt1 View Post
I have a 2011 vw golf wagon with a cjaa 2.0l cr tdi and i would like to put it into my 2008 audi a4 b7 quattro 2.0 tfsi.


My question is how do i mate the two wiring harness and get the cjaa ecu to communicate with the Audi, and the stock gauge cluster.
What you trying to do is almost impossible bacuse you have k-line car vs CAN ECU. ECU in VW communicate with separate CAN Gateway module, You Audi ECU communicate via Cluster.
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Old May 9th, 2019, 14:03   #4
nezhinskyt1
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So what your saying is that there is no way for me to mate the systems to work together
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Old May 9th, 2019, 15:50   #5
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Quote:
Originally Posted by nezhinskyt1 View Post
So what your saying is that there is no way for me to mate the systems to work together
I do not believe it is possible either. The natural choice for a B7 would be a PD engine. A bhw will bolt in with minor wiring changes and the use of a European ECU and engine harness. I have done several of them.

If you want to swap the CJAA into an audi, a B8 would be a better choice. You will still need a European ECU, engine wiring harness, injectors and glow plugs, but euro common rail diesel electronics can be made to work with the B8.
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Old May 9th, 2019, 16:03   #6
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BHW would be a much better option.
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Old May 12th, 2019, 23:27   #7
nezhinskyt1
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Okay thanks appreciate it, so if I go with a BHW engine what else would I need
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Old May 13th, 2019, 07:11   #8
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Quote:
Originally Posted by nezhinskyt1 View Post
Okay thanks appreciate it, so if I go with a BHW engine what else would I need
Wiring harness and ECU from BPW or similar engine (make sure ECU is Quattro, part number ending in KM or KN). Flywheel and clutch, dual mass setup is highly recommended. You'll also need a starter to go with the dual mass setup. An accessory bracket from a BPW will be needed as well as the belt tensioner. You'll need a tune to get rid of the DPF function in the ECU and you might want to add some power anyway.
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