2006 Megasquirt build

[mac1]

after 4 years of ownership, I got fed up living with COBB ots tunes as they do nothing, I dont want to upgrade components until i get the max out of what I got and what i got is stock. It feels slower then 4 years ago.

I want a few more PSI of boost and put to use whatever the stock pump/injectors can handle with an adjustable FPR currently i dropped it to 35 base pressure.
Built a MS2 for this project and so far I have piggy backed the stock ECU and went for a test and tune on my back roads.

initial plans are:
keep stock ECU controlling Idle/ETC, Spark, Fans, Tach,Cruise control (currently disabled cause i detatched the fuel pump module)
THen attatch MS to Grimmspeed 3 port solenoid,fuel pump 100% duty constant, fuel injectors <-has not triggered a Code from this

After initial tuning session last night I find idle is finicky and stalling but I believe the MAF is touching the turbo overflow alloy bottle and causing false hot IAT temps and messing with ETC parameters.

If this is not the case and the idle will not stabilize then I will be forced to go full standalone
-copy over as much of the timing table from the COBB screen
-keep the stock ECU connected to KEY On power and only leave the throttle body and pedal functions attatched (tested last night)
-this option means I fully disconnect the CKP from the stock ecu so it does not see anything running and try to control my idle
- this also means I lose cruise control
-remove the 20mm freeze plug on top of the intake and tap m20 x 1.5 threads and get a -8an adapter
- then hook this up to any PWM idle motor I can find at the scrapper, preferably a bosch 3 wire with a 35ohm 1 watt resistor on the closed side to Ground
-Use the CEL bulb as a shift light.

Ideally I would love to hack into the THrottle pedal and change it's output signals to get a full sweep of the pedal rather then 1/2 pedal=WOT (anyone know about this?)

[Hobby Racer]

It's not the cheapest route but a full standalone is the way to go. I run an MS3Pro ECU with a separate DBW controller to handle the electronic throttle. The setup works fantastic and is fully tune-able. Again not the cheapest, but you can get every last bit of performance out of your setup without hacky workarounds.

The MS2 ECU you have will not let you run COP ignition and fully sequential injection. You need an MS3 unit for that.

[mac1]

It's not the cheapest route but a full standalone is the way to go. I run an MS3Pro ECU with a separate DBW controller to handle the electronic throttle. The setup works fantastic and is fully tune-able. Again not the cheapest, but you can get every last bit of performance out of your setup without hacky workarounds.

The MS2 ECU you have will not let you run COP ignition and fully sequential injection. You need an MS3 unit for that.

Well actually MS2 can run sequential fuel on 4 cylinders as I have done it once before but Will Not run sequential spark. You can however run wasted COP.
BUt for anything sequential you need a CAM sensor so my question to you is did you have to modify your EZ33 for a CAM sensor or was it there stock?

As for the Throttle controller, I plan on fixing the overactive throttle with a voltage divider. And I have to wonder why this topic is never talked about, almost as if verify few if any have a way of readings the pedal position relative to throttle, I have compared to another '06 build and was exactly the same result.

4.10.4 Sequential injection 'mod'Not recommended for novice users!With some fairly extensive internal hardware modifications and the addition of extra drive circuits, the MS2 can
run sequential injection on four outputs giving fully sequential fuel on a 4-cyl and semi-sequential on an 8-cyl.

Then there's the question on the COP themselves, from my research they are 12v logic triggered from the ECU.

[Hobby Racer]

As you pointed out the extensive mods required to run fully sequential on an MS2 are why its not recommended. MS3 is a much better platform for that as everything you need is built-in. Plus MS2 is no longer being developed (end of life product).

As far as my EZ36, it runs ALL the factory sensors, including all four cam sensors to use variable cam timing on both the intake and exhaust cams and fully sequential injections and spark. The Subaru COP are 12V logic triggered with built-in igniters and run from the MS3 unit directly.

As for the DBW throttle, this topic has been talked about a bunch on the Megasquirt forum and its currently only supported via third party modules for safety and liability concerns.

The DBWX2 module is the only supported DBW module I am aware of (its the one I use).

[mac1]

Fast forward the last 3 months fighting battles with the FBW, RPM signal from COP adventure, open loop/closed loop from Subaru ECU. Equipped with Cobb v3 so i can view all OEM sensors. This is a 2006 engine all original parts except for WTA intercooler.

Originally attempted at fuel only then to add more boost and some meth. This was on ms2 and using 36-2-2-2 decoder but being hooked up in parallel (subby ECU controlling spark, throttle/idle,fans,etc) i had long resets from sharing the ckp and idle would stall at times. Switched to ms1 to have water injection & boost only in Open loop so I could keep the factory tune in its entirety.

-MS1 getting rpm signal from the OEM tach output wire 12v square wave ( thanks to jsmcortina)
-MS putting out a replacement tach output to the tachometer with 1k pullup (cannot share this signal btw)
-MS INJ-1 hooked to SSR and for 150psi water/meth pump
-MS boost circuit built for 3-port MAC valve (in parallel with Grimspeed 3-port valve subby controlled)
-MS prog. output for Anti-syphon normally closed valve on Meth line
-3 gph single meth nozzle b4 t.b.
-added GM IAT and sharing CLT sensor
-added Innovate Lc-1 after turbo
-MS prog. output relay switching 12v side of meth pump
-Volume knob POT hooked up as the TPS input with 3 Throttle values for boost duty target table

Being piggy backed, I learned I can only add boost and meth at open loop which for me is 4300rpm,
and being Subaru it has factory boost by gear it seems. If i give it extra boost in 3rd it will occasionally misfire and throw codes. So I almost need a scramble boost button for 4th gear application of full boost.

As of today I have gone up to 13psi and injecting 15ms @ 60% duty of meth out of Bank 1
the AFR stays at 12 - 12.5 after 4300 rpm Open loop.

I cannot post .msq file but I can share via email.

https://www.supermotors.net/getfile/...9af57053a.jpeg

Find RPM signal
https://www.youtube.com/watch?v=_EucpiV0WnQ

[mac1]