Plug And Play Megasquirt - Success.

[dcg9381]

What would I need to order from DIY for a "Stockish" 85 22RE removing AFM setup and keeping stock dizzy/coil arrangment?

The same thing you'd order if you were going to use the AFM.  The difference is in the harness and software configuration.  
I believe I'm now selling megasquirt - I discount $25 off what DIY autotune charges after "customization" - that is, I sell it for $325.  I'll preprogram and configure it for free.

a) I order MS ECU from *wherever*
They send me Configured MS ECU
c) I send you the MSnS and a donor ECU + $$$.
d) You send me pretuned MSnS + Plug'n'Play harness.
e) I plug everything in, remove AFM, install Air temp sensor and MAF tubing. then drive off?

That's correct.  One change:
Removing the AFM requires that you install a jumper on the old AFM connector.
You'll have an extra set of wires for the air temp sensor relocation outside of the normal harness.


I've gotten some "comments" on me making a mint of the harness.  Please consider:
1) I buy core ECUs for these things.  They're not free.
2) The wiring I've been using is from DIY autotune, completely labelled.  That wiring costs me $75.
3) It takes me about 3 hours to make one of these.
4) Additional costs - heat shrink, solder, silicone, full insulation.
I make signficantly more money at work... This isn't a high profit deal for me.

Remember, I'll detail how to build the harness for FREE.. Just ask me!
d_ginther@hotmail.com

[SonyPete]

Don't get me wrong I def appreciate what you doing here. But I never accused you of making a killing. I was under the assumption you were using just simples colored wirting and making the whole thing from scratch. Which would save you lots of money then buying the $75 harness from DIY. But now knowing what I know that your modifying the a DIY colore coded and word printed wiring, its seems very reasonable, and look forward to maybe getting your setup.  :D  

[dcg9381]

Don't get me wrong I def appreciate what you doing here. But I never accused you of making a killing. I was under the assumption you were using just simples colored wirting and making the whole thing from scratch. Which would save you lots of money then buying the $75 harness from DIY. But now knowing what I know that your modifying the a DIY colore coded and word printed wiring, its seems very reasonable, and look forward to maybe getting your setup.  :D

I may stop doing that in the future.. most people buy this so they don't have to understand what's going on.. All the wires are hidden anyway.  I usually tag them with printed labels.. Which might be just as good.





 

[dcg9381]

Another comment, I'm getting requests from the pre-85 (I think) TCCS guys..
If you've got a vacuum advance distributor and a switch-type TPS, this system won't plug and play.  

It will work if you have a non-vac advance 22RE.

With the TCCS cars, megasquirt can work, and I can help you through getting what you need and integrating with the harness (I've got 2 TCCS 2-connector harness that were sent to me incorrectly).  I'll sell them inexpensively, but I won't support a full integration with that setup.
To make it work, you'll need to run wires to the following
1) A 3-wire standard TPS.
2) A "locked" distributor.  The one from a later 22RE is fine.  
3) A simple coil setup - no ignitor or other ignition system of your choosing (like an MSD

This means a different MS config from the 85 Celicas.
Fuel tuning will be the same.
Timing tuning will be the same.

One *other* option is to use an EDIS system (crank trigger, sold on ebay) - I hear it's very easy to setup and very well documented with megasquirt.  It's also more accurate and looks kinda groovy - plug your stock distributor hole.

Again, if I can't test it here, I can only provide advice or partial assembly.

[Ashe]

That's correct.  One change:
Removing the AFM requires that you install a jumper on the old AFM connector.
You'll have an extra set of wires for the air temp sensor relocation outside of the normal harness.

 

Couldn't I use the existing air temp wires in the AFM cable, It's not going to the AFM anymore so it could moved with the jumpered cable to the new location easy enough and not require any extra wires there.

Also How do you have the ignition setup?
Does it allow ignition timing changes through MS?
Which version of MS do you use? I believe I saw somewhere that you were running MS'n'SE but I dont believe you said anywhere in this forum.

One of the reasons I really want to get MS is the ability to set it up for what I have now, Allow room for upgrades (My next major one after my rebuild is going to be MSD Ignition) and be able to go turbo with in the future (read a few years) with out changing much more than programming.

I'm also pretty sure I can get ahold of a few ECU's for you for cheap (likely free) if it helps any.

[Teranfirbt]

On my setup I'm using the stock AFM harness for fuel control and air temp. I just used the ground in the AFM harness for the air temp ground, and the fuel pump control is just a jumper. I've got a picture:

[SonyPete]

Hey dcg9381 your getting the EFi names confused. The TCCS came in the 85' celicas and later 22RE engine cars. TCCS is the locked Distributor with hte ECU controlled igntion. Us vac distributer guys are running non-TCCS EFI's which have no control over the igntion timing.

[dcg9381]

Hey dcg9381 your getting the EFi names confused. The TCCS came in the 85' celicas and later 22RE engine cars. TCCS is the locked Distributor with hte ECU controlled igntion. Us vac distributer guys are running non-TCCS EFI's which have no control over the igntion timing.


 

Pete:
Got it.. Us truck / 4runner guys didn't have EFI until 85... We were shorted.


Teranfirbt, your fuel pump control is a jumper back to the ECU (MS control) or you're just jumpering it to have it activated when the ignition is on (main relay)?
The M2 and the 4runner are pinned out differently at the AFM.  I haven't seen the full diagram for the Celica.

Ashe, you can use those existing wires.. I just though it was "easier" to go from the ECU area to the plenum than it was to go from the AFM to the plenum.. Less to go wrong and I can make it look factory.  Also, I'm running additional wires anyway.. I'm doing a wideband and some minor control of relays....

I'm using MSnSE (Megasquirt and Spark Extra). MS-I, PCB v3.  Nothing against MS-2, but it's a little more expensive and at the time, it wasn't as fully featured as MSnSe.. MS-2 will overtake MSnSE in terms of function, long term...
One version is more than enough trouble for me - Too many things aren't compatible across versions.


I'm using 100% stock ignition and full timing control.  That is, i'm driving the stock ignitor/coil the same way the factory ECU does.  An overview of the system:

[Ashe]

Our AFM's are on the same side as the plenum so the cable will actually reach. My goal would be to have it completely P&P except the MAP sensor and adding the ATS, if I can hook my cable up like terrans then thats less work I have to do if for some reason I take the system out to go in another Chassis. Or if I decide to put the EFI back to stock and sell (Never Happen, my GTS is way too sexy, even with car leperosy)
Well I also Plan to get an Wideband anyways to make tuning easier.


Personally it doesn't matter much to me, I've always been more partial to MSnSE, I was just curious.

[Teranfirbt]

dcg: I'm having MS control the fuel pump.

[sha-d]

Hey dcg9381 your getting the EFi names confused. The TCCS came in the 85' celicas and later 22RE engine cars. TCCS is the locked Distributor with hte ECU controlled igntion. Us vac distributer guys are running non-TCCS EFI's which have no control over the igntion timing.

so this system would work in my 83 celica?

wanting to turbo it. put around 200hp to the wheels.

do i need this EDIS thing?

[dcg9381]

so this system would work in my 83 celica?

wanting to turbo it. put around 200hp to the wheels.

do i need this EDIS thing?

Megasquirt is designed to work with almost anything... The devil is in the details.
Can it drive your factory EFI?  Absolutely!  I've done this one of two ways:

1) In your car, your ignition system is stand alone. No computer control.  You can simply replace the fuel control side, which is the easiest part of the MS install.  Remove ECU, wiring in MS adapter, and program away - note I've got two 83-84 adapter harnesses not completely finished, but they have the ECU connector on them if you're interested...   You can use this system to do basic turbocharging.

2) Do both timing and ignition control.  This makes it more complicated as you have to control your coil.  You need a "locked" distributor to do this - one without mechanical advance.  These are cheap and easy to find (any EFI truck/4runner).
Doing it this way provides complete timing control, which is necessary for higher boost and more advanced turbo charging.  It's a more complicated install, but nothing guys here can't help you get through.  Doing EDIS makes things a little easier - you strip out your distributor and your factory EFI computer.  It's a well documented install that has much better ignition resolution than stock.

[thesteve42]

heated o2 doesnt apply to the 85 gts anyway

[83GTCoupe]

heated o2 doesnt apply to the 85 gts anyway

It does if you've added an LC-1 WB O2 sensor, which Teranfirbt and myself have both done.  

[thesteve42]

what would a megasquirt cost me in kit form?
I can assemble, electronics is what I do.