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mk1 tdi in limp

Started by andymondeo, December 30, 2014, 01:02:01 AM

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December 30, 2014, 01:02:01 AM
i have recently puchaced a mk1 tdi110 galaxy done 175000 miles with an auto box unfortunately the auto box was slipping i have fitted a new solid flywheel clutch and slave cyl  the car has went into limp mode i have checked the brake light switch and its fine symtoms are low power when accelerating like no boost idles fine the glow plug light flashes the engine was fine before gearbox swap is ecu same on both manual and auto ?
December 30, 2014, 10:32:49 AM #1
Ecu is physically the same but programmed very differently, flashing glowplug light means a fault code is active.
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December 30, 2014, 12:40:39 PM #2
Did you research this auto to manual change? apart from the box clutch and flywheel there are many differences in the way the engine ECU will react, the auto box has it's own ECU which works together with the engine ECU and other components like heater and aircon and central electrics unit.

There could also be issues with the VSS vehicle speed sensor.
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With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
December 30, 2014, 06:57:21 PM #3
yes chrispb i have done a conversion a few years back to a mk1 clio it had a gearbox ecu i have been looking at the wiring diagram for the galaxy looks straight forward to do if i have to i will find a manual ecu and loom if i cant get it done with the auto loom in place i have a vag code reader on way hopefully its just some connector thats at fault
December 30, 2014, 08:19:54 PM #4
Have you reconfigured the ECU to suit a manual transmission? If you've made no mods to the electrical/ module configuration side of things then that's where you need to start IMO.
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December 30, 2014, 10:26:56 PM #5
as far as im aware theres only 4 extra wires that come out of the ecu compared to manual i will double check what i have done after the new year
December 31, 2014, 11:57:39 AM #6
It's not just the wiring differences though is it, it's the signals passing in and out of the PCM- is the auto gearbox control module still fitted or have you removed it? Either way, the engine management is looking for input signals from the gearbox module and the gearbox module is looking for input signals from the auto gearbox sensors which are now absent, this will therefore cause problems.
Always learning..... Often by mistakes!
December 31, 2014, 05:45:00 PM #7 Last Edit: December 31, 2014, 05:49:44 PM by andymondeo
one code has popped up 17655 needle lift sensor
December 31, 2014, 08:51:33 PM #8
Needle lift sensor is part of number 3 injector.
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2023 VW Transporter T6.1 SE In Silver 2.9TDI 150PS. 7 Speed DSG Wheelchair accessible day vehicle.


With VCDS lite (full version) need a code clearing or want to scan for faults in the north kent area, PM me. All for a pint of Strongbow.
December 31, 2014, 10:18:44 PM #9
thats not bad ive got a spare one sitting
January 02, 2015, 04:33:16 PM #10
got 2 connections mixed up injector 3 and inlet charge cooler sensor lol thats what i get for doing electrics in the dark
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