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IMPORTANT: enter the case-INsensitive alphabetic (no numbers) code AND WRITE SOME SHORT summary of changes (below) if you are saving changes. (not required for previewing changes). Wiki-spamming is not tolerated, will be removed, so it does NOT even show up in history. Spammers go away now. Visit Preferences to set your user name Summary of change: Hi everybody, I am looking for a configuration for 3B engine or for the change that must be performed on the configuration attached below. What are the precise modifications for the conversion from motronic55 v3 vems from Audi ADU, ABY or AAN engine to 3B Audi engine. I suppose this is only the ignition output that shall be only one channel rather than 5 channels for the ADU, ABY and AAN engine ? Many thanks in advance. All the best. * actually, the engine is almost the same but the '''harness differs''' (and the number of ign transformers of course) * the 3B and AAN harness has several annoying differences (even where they should really be identical, like trigger inputs) * if you kept the 3B harness, just want distributerless ignition with 3 channels (1, 2-5, 3-4 wasted spark) or 5 ignchannels, you don't need to "convert", just use the pins on the extra EC10 conn (or SSC6 in older models). * you can find some related pinouts in http://vems.hu/download/v3/Motronic55/Audi/ , although useful for verification , it's not suitable for building or rebuilding a device * if you really swapped harness from 3B to AAN, maybe it's best to sell the 3B ECU and purchase an AAN type (or an econoseal ECU and a v3*harness). Lolo http://www.vems.hu/filethingie.php/files/loloquattro%20config%20to%20convert%20to%203B/files/loloquattro%20config%20to%20convert%20to%203B/files/loloquattro%20config%20to%20convert%20to%203B/files/files/v3.3_Audi_config_to_convert_for_3B_engine_1.1.96.vemscfg?subdir=lolo_quattro_config_file_for_3B_conversion Thanks for your very detailled explanation, I am sorry for the bad interpretation, in fact I do not intend to modify the harness, I already have a 3B motronic55 vems ECU connected on the car. I was looking for the data change in vems.cfg using vemstune to convert a Audi 5 coils vems.cfg that I have to 1 coils for the 3B as it use only one output for the ignition and I did not know which one among the 8 ignitions output. I had the information to set for the 5 ingnitions output the EC18 pin11. Optional: Add document to category: Wiki formatting: * is Bullet list ** Bullet list subentry ... '''Bold''', ---- is horizontal ruler, <code> preformatted text... </code> See wiki editing HELP for tables and other formatting tips and tricks.