Do I really need the MS'n'S? I read that people run stock spark curves just fine and really never even have to modify them until they are running more than like 10 pounds of boost. I think I will probably add on the fan control and tach output...my ES doesn't even have a tach but I can buy an srt-4 cluster for like $40 off ebay :P

 

For an R/T its nearly a must to have the MS'n'S since the R/T PCM likes to pull spark timing and do whatever the hell it wants (she doesnt like boost apparently). But for the standard NGC PCM you probably wouldnt need to...but really why wouldnt you do it? There are already tons of spark tables that you could start off with and just work your way up from there as far as tuning...plus its not much more time/difficulty to have your MS control spark as it is for just fuel.

 

You're probably right but the fact is, I really have no idea how to install the thing. It seems that installing the MS'n'S is more difficult than just the MS. That brings up another question I had before...should I take this somewhere to install? Do you think there are specialty shops that will know what the heck megasquirt is?

 

It really depends on how proficient you are with electronics and wiring. The MS unit will be in the passenger compartment so you'll need to run the wiring harness through the firewall...then you just hook up the input/outputs which is accomplished by tapping into the main PCM plugs. Its obvioulsy more involved than that, but you get the idea...if you suck at wiring i wouldnt try the install. As for performace shops, I dont trust most of them and there are very few that actaully have experience with Neons and MS. If the shop can install an AEM standalone or anyting like that however, you should be fine.

As for your MS unit, you dont need the tach output or the fan control as far as i know. While your Neon didnt come with a tach its already wired for one, so your good to go. And the PCM is still controlling your radiator fan so your good there as well. You'll also need the GM IAT sensor, CLT sensor, and a wiring harness...

 

i didnt have issues with puttin on my afc put might struggle with my mega squart so get ready to answer alot of my questions

 

here is what you need

http://www.rs-autosport.net/catalog/...roducts_id=210




Configuration:Hall Sensor InputNeon/420A (MS-I Only) (+$35.00)

Fan Control Output:No Fan Control OutputFan
Firmware: ok here you have too e-mail them and ask for the latest ngc code since your car is 03
MAP Sensor: for this you can pick any thing you want I have 3 bar but gonna upgrade since I am planning on running more than 30psi
Tachometer Signal Output:No Tach
Upgrade to MegaSquirt II: Standard MS-I ControllerUpgraded
http://www.rs-autosport.net/catalog/...roducts_id=215
http://www.rs-autosport.net/catalog/...roducts_id=216
with these you get them with pig tails makes it little easier too solder in

http://www.rs-autosport.net/catalog/...roducts_id=229
this makes wiring really easy
you just use this wiring daigram
http://www.rs-autosport.net/catalog/...iring_420a.gif

oh yeah I highly recommend a wide band o/2 with out put signal wire it is worth itwheight in gold when tunning feul

 

Neons dont have a wideband o2 sensor?..... oy...... thats no good.... anyone know if someone has cracked the ECU on a neon yet....? im just waiting for that to happen...

 

never gonna happen

 

the neon o/2 is narrow band so no good if you wanna tune the car richer than stoich
and it aint gonna happen likespikey said.

 

blah.... ok so what would you do just replace the narrow band with a wide band? or what?