wiring IGN 1A coils

[Noslin]

looking for some input on where to put letter "B", Logic ground. Im taking it ignition signal is A1-4 ( 4 cyl). would "B" go to A10 or A11 or could it connect to batter negative, same as "D"?

Here is the connector pinout:
A - Ignition signal from ECU
B - Logic ground, connect to ECU ground
C - Spark wire ground, connect to cylinder head
D - Power ground, connect to battery negative
E - 12 volt power

ty
dean

[PQatPIT]

I connect A10 and A11 with separate wires to cylinder head or block.

If IGN 1A or similar coils are used then I connect B terminal to this point also, with its own separate wire. Do not connect any other wires to this grounding point. Ignition ground ie. C terminal goes to cylinder head, again no other wires to this grounding point.

Never had any grounding or ignition related problems when done it this way.

[Noslin]

i ended up taking "B" back to the ecu ground as i figured it would need to see it if you were to create a map for the coil dwell???

ty for your reply
dean

[Scott@FP]

'B' is for 0veng or 0vaux. For dwell table to have validity, your 12v source at 'E' to the coils needs to read the same as what the ECU sees, just like injector batt comp. Might be wise to feed B+ to ECU, coils and injectors from the same relay output to make all the voltage compensations proper.