This guide is currently in development and can people pm me any picture's, info etc that i have missed....and will be updated very shortly!
This is a guide to remapping/chipping the mk3... Each engine code comes with it’s own specific ecu and a performance chip should be specific to the ecu for best performance. Another thing to remember is post 95 car's also have the immobiliser built into the ecu, and a new ecu is £££ (so you really don't want to fry it!! as it's not as simple as buying a new ecu from ebay etc)
The guide is taken from various sources and hopefully is correct?
The common ecu number's (this list may not be 100% accurate)
8 Valve (2E) 92 on Bosch Digifant :5WP 4 064 :::::::::::037 906 024 B
: 5WP 4 122 ::::::::::037 906 024 D
93 on : 5WP 4 151 ::::::::::037 906 024 AG
ADY 94 Siemens : 5WP4 160 ::::::::::037 906 025 A/E/
AGG 95 on Siemens : 5WP4 204 :::::::::::037 906 025 H
: 5WP4 256 :::::::::::037 906 025 R
16 Valve ABF 91-94 Bosch KE Motronic : 0 261 000 852/3:::::8A0 907 404
92 on Siemens Digifant : 5WP 4 066 :::::::::::037 906 024 G
Bosch Digifant : 5WP 4 133::::::::::::037 906 024 AB
95 on Siemens Digifant : 5WP 4 237 ::::::::::::037 906 024 AE
: 5WP 4 304 ::::::::::::037 906 024 BE
VR6 2.8 (AAA) 91 Bosch Motronic 2.7 :0 261 200 495/496:::::021 906 258 A
92 on Bosch Motronic 2.7 :0 261 200 491/492:::::021 906 258 CB
: 0 261 203 568/568:;::021 906 258 CH
92 on Bosch Motronic 2.9 : 0 261 203 116/117::::021 906 258 AF
94 on Bosch Motronic 2.91 :0 261 203 222/223 ::::021 906 258 BM
95 on Bosch Motronic 3.8 :0 261 203 968/969:::: 021 906 256
The big problem with chipping the mk3 ecu is how the chip is fitted, some are simple push fit, some are soldered to the board and others have a metal protective plate. And there dosen't seem to be a definate answer on what year's, what engine's etc have what type of chip (and looking at the number of ecu's I'm not surprised!)
The 2 type's of chips are listed below.....
PLCCSome ECUs have a 44pin "PLCC" chip. These are always in sockets.
This is very hard to install without the correct tools. The PLCC chips need hot air on all four sides to get it out safe with out ripping the pads off the ecu.
DIPOther ECUs use 28pin push fit "DIP" chips. Some DIP chips are socketed, some are soldered directly to the board.
But even some socketed chips can be covered with a metal cover plate with 4 sides. This clipped into upright pieces joined onto the circuit board by clips that you need to prise apart.
RS components do the DIP socket holder to make the chip a push fit, Hot air or an iron with built in vac sucker is needed to get a 28pin dip clean out, you will be there all day with a basic 50w iron and braid.
Fitting information.very good guide
http://www.ross-tech.com/g-chip/install1.htm8 Valve upto 95
http://www.powerchips-technology.com/Guides/2LGTIChipGuide.pdf8 Valve 95 on
http://www.powerchips-technology.com/Guides/2LGTIChipGuide2.pdf16 Valve
http://www.powerchips-technology.com/Guides/2L16VGTIChipGuide.pdfVR6
http://www.powerchips-technology.com/Guides/VR6ChipGuide.pdfOr the sites own Nick from R-Techs guideThis shows a PLCC chip being installed
To get the new remapped file on to the ECU we need to open it up and remove chip, in this case it was a square PLCC44 pin chip which requires a lot if skill. We then read the information from chip so we can compare with our tuned file and make sure the checksumms and software is correct for the ecu and engine set up. We will then write the new tuned file to a brand new flash chip and resolder in to the ecu.
the map software will need to match your current software version, so it is a bit of guess work?? If the software is wrong you will have issues and the chip will need to come back out again
We then open and locate the chip with the map information
Then with years of skill the chip is lifted with hot air and a vacuum pump.
The Chip is then read
Then the read information is check against the remap file
The new chip taking the new remapped file
The chip is re-mounted in to the ecu and tested
Nick@Rteck
BuyingR-Tech 01455 619 854
http://www.golfgtiforum.co.uk/index.php?board=74.0 telephone:
Powerchips technology (as seen on ebay)
http://www.powerchips-technology.com/Guides/