Engine only runs on cranking

[julian]

anyone had a chance to checkout my datalog, any ideas on what i should do next?

J

[grippo]

I see lots wrong with this datalog. One thing is that you are using alpha-N but the alpha_lo and _hi rpms are both 0 and implies you are using speed density above 0 rpm, but have no map. Don't know what problem that will cause. TP is all over the place, not sure if you are doing that to keep the engine running. The VE values are all 100s everywhere, even though you have a table with different values. The spark advance is 0 everywhere, but again you have a reasonable table in the msq. There are other things that also indicate to me that your code is corrupted.

I think you need to start over from scratch with the default msq and download 2.892 or higher code and just change the things you are sure of and try again.

[julian]

Ok, i'll have ago, this is a software issue, nothing broken in the megasquirt you reckon.
i'll crack on with it. cheers.

any more ideas are welcome tho!!!

[julian]

Hi, having some issues downloading 2.8 or higher megatune, the links that i can find are for files i can't seem to save? And how do i reinstall the firmware on my microsquirt controller?

I am currently using 2.25 (P3) megatune, would this cause issues?

[grippo]

There is an issue with code v3.0 and higher, which requires you to use Tuner Studio. But any 2.8x or 2.9x code should load on microsquirt. It should load exactly the same as your present code, but you need the proper ini file for the code version you are loading. To download there is a bootload wire that has to be grounded, then ungrounded when finished loading. As far as saving the file, you should be able to do this. Sometimes the options to save are confusing: (save a link, save a copy save as, etc), but one of them should work for you. I once had to open the file, highlight and copy the whole thing with ctl C and paste it in a text file which I could save. This all depends on the operating system and version and your PC setup.

[julian]

I've definitely become confused between the firmware on the ecu itself and the megatune that i want to use to tune it on my laptop.

Could you confirm which i need for both.

I'm using megatune Version 2.25 (however when it starts up with gives me a number of options, upto 2.88 this is whats confusing me.

the firmware on the ecu is how it came, and i need to reinstall the latest 2.892 or higher, by grounding the bootloader wire etc.

[grippo]

Use 2.891 code (s19 file) here : http://www.megamanual.com/ms2/code.htm
In this there is a link to the Downloader program and there is also an ini file that goes with the code.

Your MT 2.25p3 version is fine. There is a link with instructions here: http://www.megamanual.com/megatune.htm

[julian]

I've loaded S19 and INI files to the ecu and megatune respectively.
I need a base map to use on my 4 cylinder 16v on throttle bodies to try and get it to start.
The default map I uploaded was odd, the fuel pump was repeatedly priming and the rpm ready on the megatune was flicking from 0-8000 every few seconds.
Using the old map that i was trying to use early (which i found out is from a megasquirt 1 ecu) still had the old issues.

I googled microsquirt maps and not alot comes up.

Whats the next step, thanks!

[24c]

The default map I uploaded was odd, the fuel pump was repeatedly priming and the rpm ready on the megatune was flicking from 0-8000 every few seconds.

I'm pretty sure this is an error state indication and a quick search validates this...vaguely I remember this from a long time ago:lol:

Hope this helps

[grippo]

Actually what you are seeing is a good sign - it means you have loaded the code correctly. What you have to do next to stop it from flipping the rpm is set an ECUType (MSII or microsquirt). This is the only thing you can change - everything else is greyed out. So pick microsquirt and you should be good to set up your table. The way to do that is to just change those variables you understand and that are obvious. Then go from there. If you search the forums and success stories you can probably find someone who has an engine like yours, possibly with a map. But I would just do what I said, change the things you know need to be changed then try starting it and make a new datalog and compare it with the old. The things I mentioned will hopefully be gone, but if not let us know.