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Hi, My projectcar is a 205 GTI with a 1.9 litre 8 valve engine. I turbocharged it some time ago and am now fully rebuilding/upgrading the engine to suit high boost. Have a look at my project webpage http://www.205turbo.nl specs in a nutshell: alloy 1905 CC wetliner engine 16 valve cyl head Mitsu td05 16g turbo ---- '''Tachometer output''' I wired the tachometer to EC-18 pin 12 (SPECFET 0) and set the folowing parameters in megatune: Tachometer channel: SPECFET Tachometer channel: 0 Tachometer divider: 0 in the help it says: Most GenBoard outputs is only pulling the output low (0 volts) If your tachometer wants 12V or 5V signals, wire up a (say, 1kOhm to +12V or +5V) external pullup resistor. Configure Tachometer Divider if you want a lower frequency to your tachometer. Check out the latest MegaTune release package (mt-r27), it has 1.0.19 firmware which has the tach output working. > Ok, I have the mt-r27 formware working now, but still no tach output. The strange thing is: I would expect a led to work here. I wired a lef parallel with the pullup resitor but it didn't do anything. Is my logic flawed? Probably I so not really know how my tachomater works. It used to be connected to the coil (-). But I use a different coil now. (wasted spark) perhaps I'd just hook it up the old fashioned way with diodes? * Wired it up '''the oldfashioned way with diodes and works like a charm...''' ** so your tachometer needs high voltage to trigger. *** One option is the "inductive pullup" as described on [http://shop.vems.hu/catalog/product_info.php?products_id=102 inductor] *** but if the diode trick worked, no reason to change it. ---- '''Staging''' I added 4 injectors to my engine. So I now have 4 injectors aiming at the valves and 4 upstream. The secondary injectors are 305 cc and the primary injectors 240 cc. '''Configuration:''' I configured VEMS to do injector staging. * rate to calculated pulsewidth (inj_stage2_rate) to 200 * TPS position to 0% * MAP value to 130 kpa. Changed the firmware so the secondaries can be larger than the primaries. I changed the VE table so all values above 130 kpa are devided by 2. Still have to test. Will come back on this later ---- OLD / solved issues for reference by other users perhaps experiencing simmilar problems Megatune showed wrong voltage: * Only problem is the volt meter in Megatune. It gives 20 volt readings while battery voltage is 13 v. ** You probably missed to calibrate it, adjust battery calibration. Default batt_cal=0xBC (decimal 188) or so *** thanks for that! ---- Ignition problems. Fuel worked but no sprak. * Publish full config, saved by mcd command. * Try to compare your ignition related parameters with a working config, such as MembersPage/MarcellGal/EngineSwap . * As the last chance, start again from the working config, only change what is necessary. * check again if you missed something from GenBoard/UnderDevelopment/FirmwareChanges * Eg. make sure secondary_trigger=02 is used ? Thanks for the feedback! It turned out to be the secondary trigger indeed. ---- Took it for a drive this day. But the engine ran verry lean (afr 1:16) and it appeared all the tables are ampty somehow in megatune. I had this problem with a more recent firware before. Ans switched to a bit older one that seemed to work fine. But now the tables are empty again. Does anybode have any idea how this could be fixed? A: There was a ini update on the magatune page. http://www.vems.hu/wiki/index.php?page=MegaTune <<This package has bug in ini file causing settings lost when updating to ECU, here is [fixed ini file]>> ---- The engine didn't start -> no fuel injection. the pulse width megatune displays is 0 though the crancking pulsewidth is set. And the the req_fuel is set(and all tables are filled with the right values) A: somehow the decel fuel cut rpm was set to 0 rpm after a firmware update. I set is back to 2500 rpm and it started again.
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