MSefi.com read only forum (Jan.15,2018)

This. Check for cintinuity between any two pins. If they're connected, you have a pair; otherwise it's the other pin next to it.

The reason for the same output being doubled up on two DB37 pins is the output driver can supply more current than one pin can handle.
<ObPedantic>The drivers are ground-switching, SINKING the injector current. The power is supplied from the battery via the relays.

Sorry, but I've seen a few ...

For something like injector ports, and depending on the heat involved, something like JB Weld may be an option.

Cooper-Bussman Power Distribution Modules- IP66, and lots of sockets.

Are these Hi-Z o Lo-Z injectors?

Yes; jbperf makes a 4-channel P&H board , so the OP would need 2. No messing with resistors, no futzing with PWM current-limiting settings. "I just turn the key, and it goes!" :lol:

More info on the MS3 can be found here . Any questions, ask away over on the 'Extra forum. Come to the Dark Side ...

Comments from the peanut gallery - you don't NEED the MS3X expansion card, but it does make this sort of thing easier. You do need the MS3 processor card, with its up-to-12 injection channels.

The H1 board jumper has nothing to do with the bootloader of the MS2 card. Suggested practice on the MSExtra site is to install a 0.1uF cap in that spot, for additional smoothing of the VBat input.

Like I said, not a Big Brain, and I need to occasionally pitch out cluttery things like unused 'v' and 'i' letters taking up badly needed room ...

I'm not a Big Brain (tm), but everything I've read about tuning is in line with Kevin's comments - the ReqFuel term is a configuration value, NOT a tuning variable. Set it, forget it, then dial in your VE map using your WBO2 sensor.

THAT's what had me confused about the LC-1 - I thought they had one common ground, but it's two grounds wired to the same point. Call me crazy (so many do! :lol: ), but that seems to me to defeat the purpose of two ground wires.

My thought would be to wire it up in the tried and tested MS way ...

The fellows over on the Extra forum have a pretty diagram that explains why certain grounding arrangements are bad; it has to do with the current flow through the main ground wires causing a voltage offset. By grounding the various sensors directly (and exclusively) to the MS, the trivial current ...

I see the confusion. I don't think the OP specified what he's using for a tach signal. If he's using points or coil -ve, then no, my suggestion won't work.

kjones6039 wrote:Or did I miss the point again?

May ... be?

He's trying to power the MS with the engine off so he can do tuning / setting adjustments, but doesn't want his coil powered in case the dizzy comes to a stop with the points closed. Unless *I* missed the point ...

Wire the power to the coil through the Fuel Pump relay. That way, the coil is dead until the engine is cranking and the FP relay driver is triggered by the MS. You can now safely sit there all day with the key on / engine off with with the MS powered up but no power to the coil.

Q23 is part of the VR signal conditioner circuit; Pin 3 (C) is connected to ground, while Pin 2 (B) is connected to the wiper of R56. Now, if R56 is completely wound out such that the wiper is effectively grounded, then yes - you will get a ridiculously low resistance between the collector and base ...

A small railgun ...

kjones6039 wrote: it won't hurt to drop in a ~25 mf cap if you like.

Are you looking for noise suppression, or powering a railgun?!

I believe the EDIS caps are 25uF ...

It is extremely difficult to do any tuning with a narrow band sensor. You'd be better off using the Mark 1 Butt Dyno.

The engine wants what the engine wants. The VE cells go up to 255, and sometimes that's what is needed. That said with "Incorporate AFR" and "Multiply MAP" turned on (or their B&G ...