direct coil control

[turbopinto]

I have a wilson racing ms2 that was built and ran with the direct coil control mod, wire #36 removed from TFI and ran directly to neg side of coil. Are there any corresponding mods done internally that allow this to happen?

I recently received it back from a repair to injector drivers and have lost spark as far as I can tell. A firmware update was completed as well. I have gone over my tuner studio settings and they are the same as before.

I have succesfully tested fuel pump, injectors and iac with the new test features but can not get spark out of the coil. Coil and tfi are known good and ran in january.

[Stinger]

I believe he does modify it internally for direct coil control but I can't say for sure.

You'll need to contact him about it losing spark and send it back so he can repair it again. Make sure he doesn't charge you or convince you that you need any upgrades to fund the repairs. Also don't allow him to charge you for firmware updating since it can be done in TunerStudio by you very simply in just a few minutes, you just follow the onscreen prompts.

[turbopinto]

It was not repaired by him. I prefer not to name 3rd party yet. They are claiming no changes were made and that there needs to be additional parts to make coil control work.

When I received this ms2 originally I had a mSD box I had to remove.

Could a firmware update from beta 3.2.1 change how coil control works?

[wesk]

Not how it works, but if a firmware update was performed and all settings have not been reviewed then it is possible lots of things are wrong.

[turbopinto]

I have reviewed all settings I know to check. The difference report from pre to post only shows fixed timing to be different and I can't find it to change it. Not an issue as I am using the table. old firmware was beta 3.2.1
No start
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Running
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I took the squirt out of the car, opened the case and verified pin 36, which is direct to neg on coil, goes to Q16 on board. There is a resistor covered in hot glue I can not identify the stripes.  Are there any DVOM tests I can attempt?

I have been told the same hardware is used if the TFI is used as stock or direct coil control. Is this correct

[wesk]

Your current file is set to use D14 for the spark output. Typically if using the "standard" megasquirt high current ignition driver board location and q16, JS10 is used. JS10 can be found close to the big 40 pin socket where the processor is, under the board. Do you see a jumper wire going from close to that Q16, to a pad labeled JS10?

To test, you can use test mode and a multimeter. First you need to come up with some type of resisor, and solder some wire legs on each side. Any value over 500 ohms is fine. Solder some lengths of wire to it, and head shrink it. This will be your pullup resistor.

Connect one side of the resistor to 12v positive, and the other side to you positive meter probe. Connect your negative meter probe to ground.

Connect the positve side of your meter probe (with resistor) to the wire you are using for coil control. Using test mode (enable test mode, turn coil testing to "on") test different amounts of dwell. Using a 10ms output interval, 1 MS of dwell should be close to 12v, and 10ms of dwell should be very close to 0 volts. Obviously if you don't connect it at all, it will read 12v as it is pulled up through our resistor.

[wesk]

Also, not that it will keep it from running if it did before, but there are a LOT of settings there set nonsensically.

[turbopinto]

I made contact with the repair man and he responded with the following :

I think we want to install an igniter transistor and retest.



I’ll be happy to do that at NC if you’re willing to send back


I am pleased to say the least.
My question now is when does this stop being a wilson unicorn and become a run of the mill ms2?

I ask because everyone who has seen my timing table thinks it is ridiculous. I think I shared it with stinger and the response was along the lines of that's how wilson does it.

That is an area that I am unprepared to tune. When I started this build with a bamafuel ms1, I was given a proven timing table that made 300+hp with my camshaft and iron head.

[Stinger]

That's good that the repair person is working to resolve the issue, I suspected they would.

As far as the unicorn question, unless someone goes through it and builds it "by the book" and removes anything that Scott does that isn't as it should be according to the MS manual, it will always be a unicorn from a hardware standpoint. The other part is his tune is a unicorn since he doesn't use standard tuning practices (though I've noticed over the years his timing tables have went from "wtf" to something much closer to what we provide). If you had a timing table you liked before from your Bamafuel days, you can very simply export that bamafuel table (if you still have the tune) and import it into your current tune.

[turbopinto]

I received my squirt back again. He did not have to install an igniter as there was one there! The ground for it had come loose and had to be re-attached to ecu pin 40.

The car starts again but it will not stay running. Wes mentioned that while going over my .msq file that it is not setup very well. I have attempted to turn off or reduce all fuel delivery assistance. I am essentially going through initial startup and just attempting to get an idle leaner than 10.0.

I have attached a short log of 3 starts. As well as the current settings. Any info would be appreciated.

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[Stinger]

Now that you have a seemingly functional ECU, we need to review all of the basic settings in the tune. To do that we need to know your setup:

Engine size:
Injector size, type, brand, etc. (the more info the better):
Fuel Pressure with vac line pulled from regulator:
Cam:
Wideband brand and type/part number:

[turbopinto]

Setup specs:
Still 2.3L
Ford racing a237 cam
94 mustang TB
Custom log onto online intake
85 lb/h injectors low z unknown brand
FP should be at least 40, hits 40 every time key is cycled
Wideband is brand new aem x series, 4.9 o2

[turbopinto]

Is there something I missed?

[wesk]

PW is tiny. Start by reducing # of squirts per cycle from 2 to 1.

[wesk]

In the log there isn't enough fuel for the engine to run beyond what is injected on startup. Also, A VE value of "10" is not reasonable anytime, anywhere.