1. What is MegaSquirt?

MS is a full standalone fuel and spark controller. MS can completely replace your stock PCM, however you will need additional relays and wiring etc. to power all of your accessories. For this reason most people used the stock PCM to power all the accessories and sensors, while MS takes over engine control.

2. Where can I get one?

A list of all current vendors can be found here: http://www.megamanual.com/v22manual/mintro.htm#group. You can buy the MS unit prebuilt, or get an unassembled kit and do it yourself. It is not hard to assemble the MS, even if you have not had much experience with electronics. If you are patient, not afraid to learn, and willing to do a little (or a lot ) research, then you have what it takes to build and install a MegaSquirt system.

3. Ok great. Where do I start?

First things first. Read the FAQ on MSefi.com found here: http://www.megamanual.com/

Then read through the MegaManual. This contains all the details of how the MS works, assembly instructions, setup and install guidlines, tuning, wiring... it's all here: http://www.megamanual.com/v22manual/mtabcon.htm

Since most of us 2gners will be using the MSnS-E "extra" code (the only code that will run fuel and spark on Neons), the MSextra manual will also be very informative: http://www.msextra.com/manuals/MS_Ex...nual_Index.htm

4. Specifically, what do I need to run MS on my Neon?

Option A: Unassembled kit (recommend diyautotune.com)

- MS1 v3.0 pcb
- Two VB921 high current ignition coil drivers (most kits come with one VB921 included, so you may just need to get one additional transistor)
- GM IAT and CLT sensors
- Wiring harness
- Stimulator (for powering and testing your MS before hooking it up to your car)

Option B: Prebuilt unit (recommend rs-autosport.com)

- When ordering the ECU from rs-autosport specify the follow options:

Configuration: Neon/420A
Fan control output: No (assuming stock ECM still controlls radiator fan)
Firmware: Latest stable release of MSnS-E
Map sensor: Your preference
Tachometer signal output: No (assuming no additional tach signal is needed. i.e. you're not adding any other hardware that requires a tach signal).
Upgrade to MegaSquirt II: Standard MS-1 controller

You will still need:

- GM IAT and CLT sensors
- Wiring Harness
- Stimulator (optional)

5. Firmware

The latest version of MSnS-E firmware can be downloaded here: http://megasquirt.sf.net/extra/ by clicking "download latest". This link also cantains all the info about the features of the "Extra" code and info about the Neon Crank Decoder, as well as hardware modifications required to control the coilpack. (the site says for pre-NGC Neons only, but MS will work on NGC cars and read the NGC crank trigger wheel)

The NGC code can be downloaded here:
http://megasquirt.texasneons.org/029v_ngc3.zip

FAQ Created by "turbodudey"

 

Whats average install time on megasquirt....DIY???

 

It all depends on your skill level with electronics and wiring really...the entire install could easily be done in a day at a steady pace. The actual assembly of the MS unit will also depend on how skilled you are with electronics.

 

I'm guessing the best way to start is by buying a fully assembled unit from...
http://www.rs-autosport.net/catalog/index.php

I myself would need help from someone to even install that [>:]

 

03neonRT,
i read on the megasquirt website that you can run up to 20 lbs of boost... on the regular megasquirt 1. and that you can only run the spark code with ms1 not ms2... does that mean that i couldnt run 25 lbs of boost in my car with the ms1?

 

if you get the 4 bar map sensor you can run over 50 ( i believe 58) or maybe im making that up but deff more than 20 and yes get teh ms1 ms2 sucks ***** because its a pain to work with neons

 

You would be correct good sir...on both accounts. MS2 = Gay...at least for the moment .

 

okay, is this all im going to need to get going on this megasquirt project? besides obviously the solder materials...





1x
MegaSquirt Stimulator v2.2 - UnAssembled Kit

1x
12' MegaSquirt Wiring Harness (MS1 / MS2 Ready)

1x
GM Open Element IAT Sensor with Pigtail

1x
GM Closed Element CLT / IAT Sensor with Pigtail

1x
VB921 Ignition Coil Driver

1x
MegaSquirt-I Programmable EFI System PCB3.0 - UnAssembled Kit

1x
MegaSquirt Tuning Cable (DB9 Straight Thru)

also, my engine is not boosted right now, but it will be in the future... would it be okay to use the open element sensor in the intake of my NA engine right now so that i dont have to buy an extra sensor when the turbo is ready?

also, the stim is v2.2, and im using the v3.0 pcb, do these conflict or what?

 

I dont think it matters what MegaStim version your using, and the only thing I see missing for the actual MS unit is you'll need a second VB921 Ignition Coil Driver. As for the intake sensor, you should be fine with the open element, but I'm not 100% sure...

 

i believe the pcb3.0 kit comes with one already like you said in the first post of this thread... so i just added one more to the cart thinking that one already came with the kit.