Can't figure out how I buggered up this nice board

http://jbperf.com/quad_ign_inj/index.html

Can't figure out how I buggered up this nice board

Postby 4Strings » Thu May 26, 2016 11:29 pm

Hi All,

I built a DIY MS2e to run my '94 Miata. It was working great with wasted spark and batch fire. I had to go and "make it better" with sequential injection.

I got the board, modded the MS2, assembled with no improvisation, and now I get no spark and no squirt.

Followed the instructions.

Daughterboard mods:
Image

components removed: R21,C20,C21,R22,R23,Y1,C24,C25

Image



INJ 1 take off location: Left side, R32
INJ 2 take off location: Left side, R36
INJ 3 take off location: Left side, R22
INJ 4 take off location: Left side, R23

Spark 1: D14
Spark 2: D16

Image

Tune changed:
Squirts per cycle, 1
Injector Staging, Simultaneous
Sequential injection, Sequential/Semi-sequential
Injector drivers, additional

CurrentTune.msq
Sorry it's named CurrentTune
(112.41 KiB) Downloaded 103 times


Please let me know what additional information would be helpful and thank you for any help you can give.
4Strings
 
Posts: 5
Joined: Wed May 25, 2016 10:23 am

Re: Can't figure out how I buggered up this nice board

Postby 4Strings » Fri May 27, 2016 9:10 pm

I was a bit confused with the ground for the ignition and for the injection seconds of the board. Think any issues will arise if I tied both ground together at the same ground location?

~ Chris
4Strings
 
Posts: 5
Joined: Wed May 25, 2016 10:23 am

Re: Can't figure out how I buggered up this nice board

Postby 4Strings » Mon May 30, 2016 11:34 pm

I took power from S5 and grounded to SG. While the schematics show them to be "Sanctioned 5v" and "Sanctioned Ground". I realize I never actually checked. Unfortunately, I'm moving and the MS2 is all packed, but hopefully soon after the 1st, I'll be able to dig it back out and at least check that it is getting 5V to the Quad board. I'll post back when I check.
4Strings
 
Posts: 5
Joined: Wed May 25, 2016 10:23 am

Re: Can't figure out how I buggered up this nice board

Postby 4Strings » Wed Jun 08, 2016 8:47 pm

Well, like most things, the problem lies with the dummy behind the soldering iron.

Turns out that 3/4 injectors were hooked up and those that were, were firing the wrong injector.
Neither of the 2 ignition signals were hooked up right.

No wonder! Everything seems good to go now that I fixed all of my goofs.
4Strings
 
Posts: 5
Joined: Wed May 25, 2016 10:23 am


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