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Old 06-05-2011, 11:11 PM   #1
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Default Ms2 (Starts now, just trying to make it run right.)

Car 1999 miata
Megasquirt2 from brain


Spliced in the 5/32" vaccum line to the back of tb, ran to ms, plugged into old ecu and tried to start car. As I understand(or maybe I don't) the ait sensor isn't crucial for me to just start the car, correct?

Car cranks and cranks but won't start. Will installing the ait fix this? Also, how in the hell do I secure the ait in my 99? Do I lop off the old one, wire the diy up and shove it into the rubber grommet?

Any help greatly appreciated.

John

Last edited by angrytoaster; 06-09-2011 at 09:08 PM. Reason: Figured it out...mildly
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Old 06-06-2011, 09:41 AM   #2
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Have you attached it to your laptop and checked all the gauge readings within the software? it is important to make sure the MS is reading the cam/crank sensors, so you know it's doing its job. Then we can figure out why it's not running with it.

If you're not going to be using the GM AIT at the moment, the AIT calibration shoul dbe set to that of the stock AIT sensor...directions are in my install sheet.
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Old 06-06-2011, 12:22 PM   #3
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Quote:
Originally Posted by Braineack View Post
Have you attached it to your laptop and checked all the gauge readings within the software? it is important to make sure the MS is reading the cam/crank sensors, so you know it's doing its job. Then we can figure out why it's not running with it.

If you're not going to be using the GM AIT at the moment, the AIT calibration shoul dbe set to that of the stock AIT sensor...directions are in my install sheet.
I'm looking at the install .PDF from boosted miata that you sent me but it only includes the gm iat configuration, what am I missing?
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Old 06-06-2011, 12:36 PM   #4
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Nvm I found it. If anybody else encounters this here's the numbers




"for the stock iat, use e following table with a bias resistor setting of 2490 ohms"

Temp. F/c. Resistance in ohms

-4/-20. 16150
104/40. 1150
176/80. 330


Sorry for being a pain.

John
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Old 06-06-2011, 01:31 PM   #5
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Update : ait deal configured and software installed. Car will start under throttle , run rough and idle out. Does this mean I have to dick with my afr table and timing? Borrowing a timing light as we speak.
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Old 06-06-2011, 01:42 PM   #6
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yeah might need to add in fuel., sounds like its not enough to keep it running.

definitely need a timing light once you can get a stable idle.
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Old 06-06-2011, 02:26 PM   #7
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So, I dont know if this is something that would help but I figured I might try to post this anyway. This is my AFR and FUEL table pre-messing with it. I tried to up them all by 5-10 as suggested by the pdf file. Is it just me or are these absolutely crazy compared to what is posted on the pdf, or maybe I am just not grasping the concept.


tl;dr what can I do to this table to get the thing to idle correctly.

Lets do this, I have the next four days off and a world of patience(I hope)
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Old 06-06-2011, 02:43 PM   #8
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that's how the map looks right now? that's not right. I can resend a map to load when I get home.

double check the spark map looks normal.

right now you can download and export the fuel map from diyautotune.com's diypnp 99-00 basemap and load that into yours (don't load the entire msq). and see how that treats you. Idle cells should be in the 30s like that random 100Kpa row...it looks like maybe your map was vicitm of bad copy and pasting?

http://www.diyautotune.com/diypnp/ap...00-18bp-mt.zip
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Old 06-06-2011, 03:06 PM   #9
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excuse my msq ignorance, but how does one just load the basemap without loading the entire msq? I downloaded it and see a lot of files but am not sure how to go about just loading the afr or fuel tables. Could you clarify that a bit if possible?
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Old 06-06-2011, 03:26 PM   #10
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you open that msq in TS in offline mode. open up the VE table and click the first green arrow, should be export table. This will sk you to save a file to your desktop and allow it.


then close TS and reopen it and connect back to your MS. (if you failed to go to offline mode it will ask it you want to send changes from your project to controller, say no). then open your VE fuel table and click the second green arrow, this will prompt you to import a file, choose the one you just saved.
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Old 06-06-2011, 03:37 PM   #11
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Thank you! I just did the first half and see what you're getting out. Going down to the car in a couple of minutes and will let you know how it turns out.


John
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Old 06-06-2011, 04:28 PM   #12
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Just loaded it. Still no go. I took a basemap off of DIYautotunes website for the 99-00 miata and when I tried to up it I received this error message
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Old 06-06-2011, 04:30 PM   #13
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that's fine, but you didn't follow direction like I asked. I didn't want you to burn the entire basemap, only take from it the fuel map.


This isn't a huge deal, but the main cooling fan will not operate because I wire it to WLED instead of PAO like that basemap uses.
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Old 06-06-2011, 04:36 PM   #14
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Quote:
Originally Posted by Braineack View Post
that's fine, but you didn't follow direction like I asked. I didn't want you to burn the entire basemap, only take from it the fuel map.


This isn't a huge deal, but the main cooling fan will not operate because I wire it to WLED instead of PAO like that basemap uses.
.

I first tried just burning the fuel map from what you linked me to, however that did not really change much. It even sputtered less than from the basemap that you had originally loaded. What i am posting a screencap of was my second try
. Any ideas?

EDIT: So I loaded the one you linked above that you said will not run the cooling fan and the car idled terribly at about 700rpm. Now my questions is, how do I recover the base map that was loaded onto here and try to apply the settings of DIY's to my map that will run the cooling fan and go from there.

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Old 06-06-2011, 11:21 PM   #15
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UPDATE: Dicked with it some more. Slowly becoming a little more comfortable with the software.

I adjusted the timing. One question though- my pulley has two notches, which do I use? I used the one on the right as the left seemed less prominant. Regardless after that the car ran a little bit better.


My problem currently is that after anything over 2k rpms the car droops to a 500 idle and stays there. Ideas?
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Old 06-07-2011, 02:58 AM   #16
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anytime you mess with it log all sessions.
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Old 06-07-2011, 02:58 AM   #17
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So I went out to mess with it a little more and see if I could get any more good news out of it.


It overheated. But Im hoping this is just because im not using the basemap that brain is going to send me that will run the main fans. So, I have a question

- my AFR guage, when i turned it on was reading crazy like, 16.9+ under any sort of load, all the way into red numbers, is this possibly another cause of my overheating?

I wish there were some literature I could get my hands on that would explain some of these things functionality. Hopefully one of you guys will post here.

My main concern is the overheating. My temp guage went crazy and I shut it down to let it cool off. Do you guys think this is only because I was not using brains base map, or is there something else stupid that I am potentially doing? What information about my map could I post to assist somebody in diagnosing whats wrong?

Any help at all is appreciated. I have til thursday to crack on this thing and then its back to work.
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Old 06-07-2011, 03:00 AM   #18
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Quote:
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anytime you mess with it log all sessions.
How do I log a session? Diagnostics > start? It cant be as easy as that...can it?
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Old 06-07-2011, 03:08 AM   #19
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data logging > start
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Old 06-07-2011, 03:16 AM   #20
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Quote:
Originally Posted by Techsalvager View Post
data logging > start


Much appreciated. This logs my entire session? I am assuming I can just post this up and then get feedback on my inputs correct?

I cant wait to dick around with this thing more tomorrow. Even though Ive been failboating it all day it was nice to actually make the car run and idle.


John
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