MembersPage/SVIScirocco (2010-03-23 21:30:30)

Car is a MK2 1982 VW Scirocco, 1600cc 8-valve K-JET engine with a BLT turbokit installed probably somewhere in the late eighties.

Engine has already been prepared for EFI by replacing

the K-JET injectors with EFI injectors using custom injector seats and BBM fuel rail.

Next step is to get VEMS control the injectors and ignition.

ECU serialnr ?


Fill in the details: EC36/xx pin and wire color for each, and other detail as necessary

Ignition outputs - firing order 1,3,4,2. The ignition coil is used with distributor ignition, so only one output: EC36/24

Injector outputs

Other outputs


IGNITION PROBLEM

I did some more tests regarding the ignition output problem

(see [Testing.txt])

I think I have something seriously toasted in the board, as;

- P259 ch0 outputs +12volts static, measured with DVM towards

ground, regardless if the MiscOutput it is assigned to is

active or not.

- P259 ch4 outputs +2volts static, regardless if the MiscOutput

it is assigned to is active or not.

- Ignition outputs give static ~0.2volts measured towards +12v.

Are these logiclevel or power-IGBT outputs ?


TRIGGER Setup

Option 1.

Stock distributor is fitted with an optical sensor, giving one pulse per firing, approx. 90degress BTDC for each cylinder.

Vacuum hose is removed from dizzy to prevent vacuum-based adjustment of ignition advance (trigger position).

Without camsync it needs distributer for ignition of course.

This was the first trigger pattern first implemented for 1.0.x firmware (around the same time as missing tooth).

--> OK, this is the trigger setup I will start with, since it's already there.

We tested http://www.vems.hu/files/PeterJensen/v3.3_n001212-2010.03.22-11.43.24.vemscfg with c004 trigger on bench (with 1.1.70 firmware).

Use only the trigger settings, other config does not match your setup.

--> Updated to firmware 1.1.70 and vemstune-2010-03-08, tested with this config, just changed ignition outputs to reflect my wirings (pin 24). Still no life on the ignition outputs, injector leds flash nicely when spinning the distributor with drill (max about 1200rpm). The ignition "test" functionality in "Ignition Outputs (visual)" -dialog also does not light up any of the ignition leds.

You might want to post your actual .vemscfg config AND .vemslog, so we can see what can be the problem in your case (and we could help). If you don't post your .vemscfg, noone will be able to help. The above definitely works with c004 trigger, so we could spot the difference (below you have very wrong configs, so if you use those instead of what we showed, you'll get nowhere).


Alternative trigger OPTIONS - not used at the moment, just keep in mind

Option 2.

Mount a 60-2 trigger wheel on the crank pulley and fabricate hall sensor brackets..

Yes, this option would allow wastedspark DIS ignition.

Option 3:

4-1 on crank (3 pulses, 2 of them are appr 60-90 BTDC; pattern is 90,90,180 crankdegrees). This is the simplest, smallest toothcount pattern that allows DIS.


Trigger testing

Files are [here]

like [Testing.txt] and [test.vemscfg]

We reproduced this setup and come up with a working - see c004 above. This is all wrong, noone should copy it !

vems_primarytrigger.PNG

nr of tooth=2 is wrong. Good value:4

vems_miscoutput.PNG

NOTE THAT YOU HAVE AN OUTPUT COLLISION ! Ign/6 used for 2 functions. It is NOT GOOD ! (validate in vemstune does not warn about this ???)

--> No, I'm using VemsTune-Install-2009-10-02.

vems_ignoutputs.PNG

ALSO very WRONG!!! Use 0..3, even if all are the same output !!!. The config we showed you has it correctly.