MembersPage/TeroKortteenpohja (2007-04-15 00:08:48)

I already have installed Genboard v3 in VW Scirocco, with 1.8 20VT engine. Lots of configuration to be done.

Previously equipped with Megasquirt v2.2 with Extra code. Continuous problems with ecu changing settings by itself. Also coil charge times were not what they should've been (difference between MT readings and reality), so fed up with melted coils.


System consists of:

Injectors wired from A to D (will add pin#s later), configured to fire 2 banks (00..01) altenating. No sequential for now, camsync not in use at the moment. I'm trying to get the car running properly first.

Ignition coils wired to Ign00(pin35) and Ign5(pin12). Pin 12 used, beacuse for some reason, couldn't get spark from Ign01(pin33). This shouldn't be a problem, should it? These all are low level outputs anyway. Coilpack has built-in IGBTs.


Here I will show my configurations for Megatune. I'll try and explain every option possible. I will update when i find answers to my own questions first. My opinion is, this Wiki is like hell to try and find something usefull. It took me more than hour to find info how to configure fuel pump output to work.

These pages are good starting points: GenBoard/Manual and MembersPage/PhatBob/UserGuide - Mattias


ign advance - configuration or measurement problem ?

Car runs fine. If advance is forced (terminal command) to 10deg, it is 10deg. But when forced 20 or 25deg, it really is 25 or 30deg.

Here's how it went:

For 15 crankdeg ignadv command change (10..25), measurement shows appr 30 crankdeg change (1..30).

Our first guess was that something misconfigured, eg. for 2 cyl. But I couldn't spot such problem. Eg. RPM constant is 3000 (12000/4, so looks good for 4 cyl):

So it is kindof likely that using wasted spark, your smart strobe light gets confused. We've seen that happening (yes: a dummy light is often better - harder to get bad readings). Consult the the timing light userguide to investigate this.

Assuming info on refcard.pdf means, mdaxx = force advance xx units, where 1 unit means 0.25deg. So 0x28 equals 10deg, 0x3c equals 15deg, 0x50 equals 20deg. => exactly. More notes:

0x50 = 5 x 16 = 80 => 80 x 0.25 = 20 deg. True. Do you have any wheel errors ? 2nd or 3rd LCD display. - Mattias

Megatune lights up a light if trigger "wheel-errors" count up to a certain number (10 or 16 or similar: might light up if engine restarted several times without ECU reboot => that is normal).

On some page was told that mlp01 takes me to the page with errors and counters, but theres just bunch of hex. W.. is the "wheel-error counter". More on [InputTrigger/TriggerLog]


basic_settings.jpg

constants.jpg

primary_trigger.jpg

injector_settings.jpg