Hello everyone! I am a long time guest, first time poster.
I own a 1.6 1990 Eunos Roadster (imported from Japan into Ireland sometime in 1997). It has been my daily for 2 years and the hardest thing I've done prior to this was a TB change.
A few month ago I took the car off the road to start a turbo conversion.
I got a new, pre-assembled MS2 V3.0 with an added ignition board (it includes Spark A, B and C wired to D14, D16 and D15 respectively). The ignition board brings the spark outputs to a second 37 pin, female D-sub. So far so good (see below).
My guess is that this circuit is a variation of the one shown in the "MS2V3.0 Hardware Manual" (Section 22.214.171.124). The only thing that seemed to be missing is the R43 / jumper (I have added the jumper since).
There are a few jumpers present at the bottom of the board (purple and red, photo below). My guess is that these are used to supply 12V to the ignition board for an aftermarket tachometer (TACH_IN/OUT above in the photo).
Since my car is a 1990 and has the Mitsubishi type CAS, I followed the manual and modified the board to get the 2nd CAS (CMP) signal in. I followed section 126.96.36.199 of the MS2V3.0 manual.
I did the following:
1) OptoIn ---> SPR3
2) OptoOut ---> JS10
3) Jumper XG1 ---> XG2
4) Installed 470 Ohm (1/4 W) resistor in proto area connected to 5V, then
5) 470 Ohm in proto area ---> OptoIn
6) Removed C30 (also checked R12, it was 390 Ohm, as required)
All seemed well until I hooked the ECU to the car and tried to start it.
First problem is that I am not getting any spark. I tested the coil connector resistances between the red-black and white-black and I'm getting 1.1 Ohm. The optimal values here should be between 0.75-0.94 Ohm. So I think the coil may be in a bad way. More worrying the the intermittent RPM signal.
During cranking I can also hear the fuel pump relay switch on and off in sync with the intermittent RPM signal.
So here is an open ended question, what am I missing? Is this a wiring issue, or a settings issue? Is the CAS bad? The lost Sync reason is #39, which just states 4G63.
The tune and .msl files are attached. Any help would be appreciated!