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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: I made a cradle to install Vems under the dashboard. This is not too far from the ignition and injection ecu from where I would get the signal sensors. This picture would only see something to someone who already knows the car ;) I set the Vems under the dashboard http://www.vems.hu/files/maserati/install1.jpg '''Noise from Vems''' Next I made the harness between injection ecu Mplex and Vems following the documentation instruction concerning the "grounds"; Everything is coming from Mplex (ground, 12V etc) through and 8 poinst external connector: triggers signal is one wire shield on the Vems side Then I bench test it. * trigger errors at low speed * no trigger errors when crank trigger shield is ground on the Mplex side. * no trigger error when using flying single wires to connect Vems * 200mv 2kHz noise on any grounds of the Vems * no noise on the Mplex side * Vems noise independent of rpm. * 0 ohm between Ground 5,32,21,22 * 0.4, 0.5ohm between Ground 26 (senor groung) and the others (so GND5 and GND26 are not connected hard). To debate .. - I conclude that there is a noise radiated by the multiple ground wires coming out the genboard the more wires, the more noise) - that it is better not to shield the trigger on Vems side - besides I do not understand much the physics or the maths of the recommendation: "all 4 GND5 (power-ground) pins must be connected to GND (EC36pin26) with short wires max 40cm (1.3 feet) from EC36 connetor to avoid damage caused by GND5 voltage jumping too high above GND (when ignition transformers, injectors or other loads are driven) ..." from "GenBoard/Manual/GroundConnections . Why not make a hard connect Ground 5,32,21,22 (good section). (This will save some pins) ?? * I got from the Vems chat some answer: the Econoseal pins have a 10A current limitation, so if one has 45A to ground this needs some pins. Indeed this can occurs at high speed if one allows 7A through each coil. * I also was suggested to test the resistance of my ground wiring to explain the noise on the trigger **alright, by luck I have a power supply with adjustable current so I can get the resistance from the voltage drop. I got 18.8 10^-3 Ohm The wire is 1.5mm2 about 0.6m long and there is a connector. So its ok, the connector resistance would be about 4 10^-3 Ohm. ** In any case I shield the trigger wires on the Mplex side and I added an extra 1.5mm2 ground wire (see the picture) -> no more trigger errors at 1000rpm http://www.vems.hu/files/maserati/VemsWire2.jpg The Mplex electronics and the MPlex case are together grounded to the battery through the car hardness and to the car body through the case. '''First firing''' For the first start I kept the injection ecu of the car (IAW) and I subtitute Mplex with Vems. So set the Vems ignition to drive only 2 pins, one to fire banK A the other to fire bank B from the 2 coil through the distributor. The engine started at first try Hurrah ! There is picture wich only shows the 2 wires from Vems to the coils! Nothing spectacular ! http://www.vems.hu/files/maserati/install2.jpg It takes more about one and half turn to start, too much for may tast Q: Are there some settings to tune? Adavnce Filtering for the carnk trigger 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.