Megasquirt Project, .....IT RUNS ! Options

[Michelj13]

Hi,

Although I have been a member for a while (since I purchased my 914), I have not posted much. I still love my 914 and it's is interesting how this car drives like an absolute go-cart.

Anyway, my engine is a carbed 2270 that I built up with the help of many including Jake, and I am now embarking on a Megasquirt project. As many know, megasquirt is relatively inexpensive for a programmable FI system. I find, however, that there is too much information out there that it is nothing short of confusing. I want to share my progress so that at the end of the day, some may learn and may become less intimidated. Hopefully I will be successful....we'll see.

I have so many questions that I will post, along with some things that I have already learned. ANY and ALL comments appreciated.

I made a youtube video of my progress up to date. Enjoy!

http://www.youtube.com/watch?v=RoJfMZ9YgQc

Michel (IMG:style_emoticons/default/smile.gif)

[Michelj13]

James,

Step 1: I have checked that all cylinders are firing. However, when I pulled coil connections, there is more of a change when pulling 3 and 1 than 2 and 4. I will need to recheck this. I have a friend that has a compression checker that I need to invite over. I was thinking this may have something to do with injector pairing?

Step 2: I tried to do this, see photo, but my idle advance may be too high. All sensors read what I think they should including TPS.

Step 3: “Tune idle for max vacuum.” and “ Play with the fueling” . Those are new concepts for me. I need to keep this in mind. Thanks for pointing this out.

Step 4 and 5: Current AFR and VE tables attached. “IGNORE EVERYTHING you have read in MS documents” Wow, as I have said in my videos, I have often found it very difficult to get exactly the info I needed to get this Megasquirt project up and rolling. Everyone’s configuration is different and the info on the internet spans a long period of time where many things keep changing for many reasons. James, you have given me a lot to chew on here 

I could not attach is my current MSQ (not sure why as I have see some posted?). I can email it to you. Feel free to modify, comment or suggest anything. I also want to learn how to use the logger.

Thank you for your input, (IMG:style_emoticons/default/smile.gif)

Michel

[JamesM]

(IMG:style_emoticons/default/agree.gif) x2, getting the engine started the first time is one of the hardest parts, and yeah there is a lot of sorting out to do here with those tables. I am guessing this may be a result of trying to import other peoples tables from different code versions (lower resolution) into yours.


As for #1 I am guessing that you have cyl 1 and 3 wired on the same injection bank. If this is indeed the case then 2 things come to my mind as a potential source of that problem either A. Wiring issue or B. some versions of the MS code allow you to fuel each injector bank using different tables, if you had this enabled with different tables for each bank then the fueling differences would account for why one bank has more of an effect then the other.

#2 good chance that it is, a copy of your MSQ and some data logs would help, ill PM you my email address

#3, Yup as was stated by others, at idle try adjusting your fuel up or down to achieve the lowest manifold pressure (highest vacuum)

#4 Aside from the wacky RPM bins your AFR target numbers don't look to bad though for an NA motor you probably don't need to go any richer then 12.5:1 at full load. Should be good enough to get you driving with autotune anyways.


From what you have shown so far I would say the first thing you need to do is fix your RPM bins on all your tables. They should go from low to high and be no duplicate bins. Also you probably dont need the sort of resolution down low that having bins at 400, 500, 700 and 900 would provide. Honestly you could make it run well on 1/4 the resolution that table provides, but we will work with what you have.

I will have to get out my laptop and start searching for settings that might give you greef, its been a while since I have been in Tunerstudio and dont remember everything off the top of my head.