Megasquirt suomeksi vuodesta 2005
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rautalankaa, kiitos..Eli XG1 ei kytketä hyppylangalla XG2 niinkuin normaalisti vaan XG1->X11(tai joku muu vapaa nasta Dsub-liittimellä). Tämän jälkeen Dsub-liittimeltä sama nasta kytketään johtosarjassa omaa paluureittiä esim moottorin runkoon tai tukevaan maahan, ei megan johtosarjan maahan suoraan. Tällöin optinen sytkäpulssin erottelu toimii paremmin vaikeissa oloissa (kuten esim kärjellisen jakajan kanssa mutta sullahan tosin ei ole kärjellistä, ellei tosi vanha bimmeri kyseestä).54. Now, it is choice time again, this time regarding the opto-isolator installed at U4. The LED inside of the opto-isolator is fired by a signal provided by the ignition system. The pulses existing on an ignition, especially when pulled directly off of the coil primary, can spike to very high voltages. The return path of the LED is terminated to jumper pad XG1. This return path can either go directly to the board ground (by placing a jumper from XG1 to XG2), or, the return can be brought out of one of the jumper slots on the DB-37 connector (like X11), and then grounded with a separate wire on the DB-37 connector, thus isolating the ground. Note: for the ECU to work on the stimulator, then the XG1 terminal needs to be hooked to XG2, and right now we are doing stimulator testing, so install a jumper from XG1 to XG2. Now, when you install the ECU, if you need isolation because the tach signal is resetting the ECU (for those installs tapping right off of the ignition coil (-) terminal), then you can remove this jumper and connect XG1 to X11, and ground this pin (#25 for X11) with a separate return wire. Note: if you are using a tach output from an aftermarket or many OEM setups, the tach signal is a nice +12V pulse - these will work fine with the XG1 terminal jumpered to XG2 in the install. Again: for testing right with the stimulator, hook XG1 to XG2. Later, after you install this on your vehicle, if you have reset problems, then remove this jumper and jumper XG1 to X11, and bring out a separate return ground wire.
Note: Do not mistake XG1 and XG2 for X1or X2. XG1 and XG2 are near R10.
Erityisesti tää "Dave" konkka kannattaa asentaa lisäksi laudalle.Some installations have reported problems with low rpm “spikes”. Typically this sees the reported rpm at 1100 rpm jump to 5000+ rpm for short periods. This can make idle and off-idle tuning difficult. To fix this, install the “Dave” capacitor. This is a 0.22µF, cap across the junction of D5/R10 to XG1. (See the ignition triggering section of the Sensor and Wiring section of this manual for details).
Eli jos sulla on todnäk toi 0.001u tuossa mikä normaalisti asennetaan niin vaihtamalla konkka arvoon 0.01u voisi auttaa.51. Install and solder C12, the Ed capacitor (399-1818-1-ND, 0.001µF, 102 marking). The value of this capacitor may need to be increased if there are noise problems with the tach signal - values up to 0.1uf will work. The 0.001uf value is a good starting point.