MembersPage/SVIScirocco (2010-03-16 23:55:06)

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 the ignition coil with distributor ignition.

____

IGNITION PROBLEM

I did some more tests regarding the ignition output problem

(see http://www.vems.hu/files/MembersPage/SVIScirocco/Testing.txt 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.


TRIGGER OPTIONS

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 (around the same time as missing tooth).

''' --> OK, this is the trigger setup I will start with, since

it's already there. '''

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'll reproduce this setup.

vems_primarytrigger.PNG

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