So I'm stuck at a gas station 100 miles from home and my car won't start. I was tuning all the way here and everything was going great until I stopped for gas and when I turned the key back on I got a config error about pin PT1. I have an iPhone and my tuning laptop so I can't upload my msq but I could take pictures of it.

I didn't change anything when I stopped for gas.

Please help, I am stranded here!

 

Open TS, find what uses pin PT1, disable that ****, drive back home like a boss.

 

How can I find a specific pin like that? And I think it's a fuel injector..... The tune I started was one from y8s somebody posted in my ms build thread if that helps.

 

Are you using the MS3X for injector outputs?

 

Yes. I found the list and disabled that one and it works now. What would cause it to randomly do that?

 

So what two things used inj1 at the same time?

 

if pt1 is injector 1 (i hate that there are different names for stuff)

and you're using a y8s-based map, then it's set up as an output for fan.

Advanced Engine
Output Port Settings
scroll down to PT1 V3 Inj 1
uncheck all the enable boxes
burn
power cycle (key off/on)

zoom.

 

I am zooming again (obviously not while typing). Y8s, might that be why my fan doesn't turn on when it's supposed to?

 

You have my pinout spreadsheet, right? Do you have your MS wired up like my MS? If you've changed any settings, you may run into conflicts depending on what you change and what I had set up.

You may want to (if you haven't) enter what you have set in the spreadsheet for your own reference and make sure all other settings are disabled or the equivalent.

 

I have my MS wired up like yours except I am using the stock coils instead of real COP. I can't figure out why the fans don't work and the AC doesn't work, and the VSS doesn't read anything, and my cruise control doesn't work. That's all I've found so far, but clearly I've done something wrong. I'm reading manuals now though to figure out what that might be. Tips appreciated.

Thank you guys for your help! I would have been stuck at that gas station for a while trying to figure out what was wrong last night without your quick help.

 

A/C and fans are both wired to the right type of circuits inside the MS? I added TIP120 transistors to the output circuits inside the box to use the INJ1 and INJ2 outputs for fans.

Same thing for a/c control output.

I used those because that's what brainy had on hand.

 

Well that is probably why mine don't work then. Is there documentation on how to do what you did?

 

It wasn't random--the config error doesn't show up until after a power cycle. If you power cycled in your driveway, it would have happened then.

*Always* power cycle your MegaSquirt when making major changes or loading in someone's random map.

 

definitely power cycle for changes to outputs or triggering.

Here is some info on the outputs.
http://www.msextra.com/doc/ms2extra/...re.htm#outputs

You can basically replace the 2N2222A with a TIP120 for more current capability.

The way I wired mine, I was able to re-use some of the existing mounting holes. I'll go look up my notes and get back to you.

 

I see, well my proto area is completely filled with the alternator circuit, so hopefully I can reuse some of those existing mounting holes you speak of and still have room for my fan and AC circuit.

And do you have any ideas why my VSS doesn't seem to register? Is that another hardware thing I didn't do right or is there a software setting I just don't have right?

 

And I'm going to guess I don't already have the right parts for this, right?

 

did you run VSS to the ms3x cam input? is the cam pullup jumper in place? it's JP7.
I didn't mess with my potentiometers so it could have been dumb luck.

and actually if you're only doing fans and a/c relay, you can use the 2n2222a just like the link above.

DIY sells a prepackaged kit to make it work but you may have to get creative to use it with the INJ1 and INJ2 outputs.

http://www.diyautotune.com/catalog/p...ans-p-126.html

 

I did run the VSS to the ms3x cam input, though I will check that after work to make sure it is wired properly. I will also check the cam pullup jumper and see if I can find some info on the pots. If I remember right, you don't need a jumper on JP7 for a hall sensor but you do for anything else, right? What does the miata have? VR?

I will buy two of those kits, though I still don't know where I am going to install them, with my proto area being full of alternator and all. Can I follow some set of instructions for the MS1? I remember making fan and AC circuits for that, though I may have put them in the proto area. That was a long time ago.

 

I didnt use the proto area. Since you've got some time while the kits come in, I'll pull out my sketches and share them. I just haven't got around to it yet.

If you use the INJ mainboard outputs, you can put the components in random places on the main board.

 

I ordered the mod kits. Any info on where to install it when it comes?