Car is my friends '86 928 S with 4.7litre V8, Strosek body kit and ultra-wide Folger 18inch wheels. Engine produces 310hp stock.
This is the beast:
It has LH-Jetronic from the factory. LH is fuel only, so spark is distributed by two(!) 4cylinder dizzys!
That's going to change because I threw old engine compartment wiring off and ignition is going to utilize VW COP's.
Car has 100-1 tooth wheel on the flywheel with VR sensor.
What redline RPM are you aiming ?'
A: No more than 7000rpm
14.09.2006
Hooked a customers VEMS box to the VR sensor to get trigger config ok until cars box arrives. After some tweaking I got steady rpm signal without trigger errors.
So, one (probably the biggest) obstacle is defeated!
21.09.06
Got the new connectors for the COPs (VAG part number 036 905 715 A) and trying to figure out the pinout for them. It seems to be the same as the ones at the COP page here (pin1- +12V supply, pin2- Ground, pin3- +5V signal and pin4- Ground), but can anyone confirm this?
I measured the resistance between pins.
it's like that: Between pin 1 and 4 = 390 ohms, between pin 3 and both 1 and 4 40kOhm and betweens pins 3 and 2 16kOhms.
26.09.06
Got the wiring done and since I have two of the 8 COPs needed, i thought I'd try to get a spark on the plug. Ok, got everything hooked up correctly and I set dwell to 3ms, cranked and.....Nothing! Ok, disconnected the coil and measured the output of Genboard while cranking, it was something like 1.2-1.3 volts for a second and then dropped to 0.08-0.1 volts.
Is that normal? Shouldn't it be like pulsing 5 volts or something?
- config and tables for this car: MembersPage/PeepPaadam/Config_Tables
- Check InputTrigger/TriggerLog
- MegaTune log
- check if the right outputs are selected
- use mdn03 (mdn02, mdn01, mdn00) to fire small spark (make some sparkgap - not necesserily from sparkplug - outside the engine so you can see; make sure the total gap is sufficient, eg. end of stripped wire 1mm from block )