I am after information regarding the MPI flywheel, its missing teeth and the crank angle sensor offset.
I am currently fitting an aftermarket ecu to my 99 JDM SPI Mini.
This year model uses an MPI block with the 36-4 flywheel trigger.
The ecu software has the MGF trigger system which I believe is the correct 36-4.
That MGF trigger is set at a 70 degree offset as a default.
It simply wont start on this setting.
It will fire but the ignition event is way too early as the engine struggles to turn over.
I was using static ignition advance of 10 degrees BTDC.
Retarding advance to 6 degrees didn't help.
Adjusting this offset seems to be the answer given this is the only other variable.
I believe the 36-4 pattern has it's first missing tooth at 30 degrees and it wont fire at a 30 degree trigger offset.
Increasing the offset gradually hasn't helped.
I have a MEMS document (attached) that states the first missing tooth is at 80 degrees and that the crank sensor itself is 55 degrees offset from top dead centre.
I can get it to run at a fast idle at of 1200 rpm with an 85 degree offset in the software but am worried about knock.
The ECU supplier (Haltech) has no information that assists me.
Do any members have better information that I can get my head around?