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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 June 13th, 2018, 18:45   #1
roadruner
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Join Date: Jun 2018
Location: Greenfield park, quebec
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Default MK4 1.8t to tdi swap help

Hi everyone, I'm new in this word and I need help with my mk4 swap.
I have 2 2002 jetta's. One 1.8t automatic with clean body but broken engine and another one tdi with perfect mechanics but rusted body.
I think make this swap because a love a diesel cars. if someone has done in the past, I would like to have tips about that.
I know I need to change all the mechanics and engine harness but my first question is, I need to change all electric harness? The dashboard harness to? Please help me.
Thanks.
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Old June 19th, 2018, 14:15   #2
CasaEd
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Location: Portugal
TDI(s): VW Passat B4
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I've only ever done VP to PD swaps, but I know that when I made a
bench flashing cable I took it from a petrol engined car and I had to
rewire the main live feed and ECU earth wires because they were in
a different postion to the Diesel ECU plug, easy enough to do as with
the other wires in the plug if the are in the wrong postion. The dash
wiring is the same, but the Rev Counter won't read right as petrol and
Diesel are different
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Old June 22nd, 2018, 06:16   #3
GTiTDi
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Very easy swap. no need to change the entire harness. The TDI harness will plug into the car, minus a few moved pins.

Quote:
Originally Posted by roadruner View Post
Hi everyone, I'm new in this word and I need help with my mk4 swap.
I have 2 2002 jetta's. One 1.8t automatic with clean body but broken engine and another one tdi with perfect mechanics but rusted body.
I think make this swap because a love a diesel cars. if someone has done in the past, I would like to have tips about that.
I know I need to change all the mechanics and engine harness but my first question is, I need to change all electric harness? The dashboard harness to? Please help me.
Thanks.
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MK2 GTI build
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