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 [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).
- batch injection possible, but semi-sequential recommended (fire only 1 at a time, every time the next one, divider=1).
- VEMS can control ignition timing with the distributor ignition (coil-type trigger?)
- pretending this signal comes from the crank and configuring it as 2-tooth, none missing
- rather 4 tooth.
- in 1.0.x easy.
- in 1.1.x relatively new firmware needed without camsync (use 1.1.67 or 1.1.69) and set tooth width to 180 degrees, Next trigger tooth=1, reference tooth array = 0, 3, 2, 1, .. .. .. ..
--> OK, this is the trigger setup I will start with, since it's already there.
we have a vemscfg with this c004 trigger, for 1.1.70 (tested on branch) you can find here: http://www.vems.hu/files/PeterJensen/v3.3_n001212-2010.03.22-11.43.24.vemscfg
use only the trigger settings, all ohter config can be wrong
--> 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.
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.
- Possible just 3 M8 screws or similar, that [1GT101DC] sensor can sense.
- always HALL sensor recommended for low toothcount (not VR).
- make an extremely strong sensor mounting bracket (~as strong that you could lift the engine with). Otherwise vibration will likely cause problems.
Trigger testing
Files are [here]
like [Testing.txt] and [test.vemscfg]
We'll reproduce this setup.
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.
