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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old December 29th, 2017, 10:59   #1
leon10tagg
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Default C Sensor wiring diagram

Would anyone have a wiring diagram for the 3 bar MAP C Sensor. I'm looking to compare it to a 3.5bar sensor to fool the ecu into providing a little bit more boost.
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Old January 19th, 2018, 22:38   #2
leon10tagg
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Just reposting in the hope that someone has the info....
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01 Golf Tdi, FMIC, CR1756 turbo, PD intake, Newman cam, EGR delete, BV, modified intake, 80mm MAF, turbo back 2.5" Milltek, 11mm IP, R520s, 3bar MAP, TD tuning box, PD130 O/C,Spax adj's, Eibach A/R bars, powerflex bushings, 312mm discs, top and bottom strut braces
05 & 04 Passat AWX, 98 Impreza turbo, 97 A4 1.8T sport
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Old January 22nd, 2018, 06:00   #3
nikolay_ss
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Are you sure it won't go into limp mode, if you fool the ecu?
I suggest you better spend some money on 4 bar sensor 03k 906 051, find someone to change your software(map linearisation, boost limit, boost target).
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Old January 25th, 2018, 21:14   #4
Fix_Until_Broke
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A part number would help a lot...not all the sensor use the same pinouts. you can swap 2.5 bar to 3.0 bar OEM ones with no issues, but without knowing what you're starting with and going to, it's hard to tell.

I did the OEM pinout here (posts 66 & 67)
http://forums.tdiclub.com/showthread...89#post5365589

From this and a spec sheet from whatever sensor you have, you should be able to figure it out.

You will likely encounter limp mode without a re-tune, but depending on the tuner, once it's running and you clear limp mode (scangauge or scan tool) it will make more boost - not necessarily more power - because the ECU has no idea that there's more air going in, or if it sees it, it will open the vanes and match fueling to the airflow. The ECU just thinks "hmm, the engine does not need as much boost today, ok..."

Modifications like this are at your own risk - have the gauges in place to monitor things until you know how the tune will react.
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