megasquirt

[SCHWARTZ]

I have bought a m-tech v3 ecu which I'm told is the same as the megasquirt v3. I have a wiring diagram a lead to plug the ecu into the pc and a short loom. I need to get the tuning software though, I have sighned up to Msefi and msextra but the sites are confusing and were no help. I tried downloading tunerstudio from diyautotune.com but that didn't want to work.
Who else is using megasquirt as I'm looking for any help and advice I can get, if someone has tuner studio or what ever I need for the ecu and firmware for it they could send me that would be even better
Thanks in advance.

[markey b]

I have bought a m-tech v3 ecu which I'm told is the same as the megasquirt v3. I have a wiring diagram a lead to plug the ecu into the pc and a short loom. I need to get the tuning software though, I have sighned up to Msefi and msextra but the sites are confusing and were no help. I tried downloading tunerstudio from diyautotune.com but that didn't want to work.
Who else is using megasquirt as I'm looking for any help and advice I can get, if someone has tuner studio or what ever I need for the ecu and firmware for it they could send me that would be even better
Thanks in advance.

TNT hammond is using megajolt iirc, which i believe is ignition only version, but should be similar

[SCHWARTZ]

cheers fella il give him a shout.

[SCHWARTZ]

also i have just checked the map sensor and it says its rated to 36psi, does this include the 14psi of atmospheric pressure so i can run up to 24psi (2bar) or that i could run nearer to 3bar (not that im going to)

[Woznaldo]

I've got a Megasquirt ECU but mine is the first version MS1 on the V2.2 board. I run Megatune software, but I'm aware that Tuner Studio is the new preference.

Try this website, they is less info so it's a little less confusing.

http://www.extraefi.co.uk/

[Woznaldo]

You can definitely get it here:

http://www.tunerstudio.com/

[SCHWARTZ]

cheers matey i think i have the ms1 v3 looking at pix i have seen on the boards, thanks for the links i will give them a go.

[SCHWARTZ]

i couldnt get that tuner studio to download properly, i have managed to get megatune though. Do i need to do anything to the ecu before i fit it, or can i just wire it up then connect the laptop to it open up megatune then set it up?

[Scoff]

If it's the same as MS v3 then tunerstudio is what you want. It won't connect until you've created a profile for the ECU. You need to go to file, new profile, and then tell the software to detect the ECU and it's firmware. It should pick it up and ask you to accept / confirm it. After that it should connect and allow you to tune it. If it doesn't detect the ECU or it's firmware then maybe there is something different about m-tech, which I have no experience of sorry.

[SCHWARTZ]

i have downloaded tuner studio from the link above several times now but every time i try and open it it says
could not find the main class. programme will exit.

[Woznaldo]

I have no experience with Tuner Studio but with Megatune the only thing you need to do is make sure that both Megatune version and the Megasquirt version are the same (software). They should then speak to each other straight away.

You may have to select the correct COM port (I use COM port 3)?

[willo3110]

hi gary you got that off me send me your email and ill send you the software didnt i put a cd in

[SCHWARTZ]

Small world there was a cd in with it all but I don't think anything was on it. Il pm you my email addy.

[SCHWARTZ]

I have no experience with Tuner Studio but with Megatune the only thing you need to do is make sure that both Megatune version and the Megasquirt version are the same (software). They should then speak to each other straight away.

You may have to select the correct COM port (I use COM port 3)?

I have megatune that will open up fine. If I plug the ecu in is there anyway I can see if they will communicate with each other without a stim? Or will I have to wire the ecu up first?

[willo3110]

gary it wont let me send them but you can get it from http://www.efianalytics.com/TunerStudio/ then go to downloads its there
when we tested it we used 12 v and earth and pluged it in it won't connect until you've created a profile for the ECU. You need to go to file, new profile, and then tell the software to detect the ECU and it's firmware. It should pick it up and ask you to accept / confirm it. After that it should connect and allow you to tune it.

[SCHWARTZ]

Ok cheers matey, I have got tuner studio now turns out I needed a few programmes on the laptop first

[willo3110]

ok mate enjoy you goin national day see you there

[Woznaldo]

Just so you know, the stim powers the ecu when it's not wired up to a car so to comunicate with meagtune, or any other tuner software, it has to be connected to one or the other.

[SCHWARTZ]

ok mate enjoy you goin national day see you there

Hopefully il be there. May leave fitting the ecu until the winter so I can still enjoy the car for the rest of the summer. Thanks for all your help.

[SCHWARTZ]

Just so you know, the stim powers the ecu when it's not wired up to a car so to comunicate with meagtune, or any other tuner software, it has to be connected to one or the other.

So can I not just connect a 12v battery just to load up the programmes?

[Scoff]

Yes, you can talk to the ECU with just 12v on the loom.

[SCHWARTZ]

cheers im going to give it a go now

[SCHWARTZ]

the ecu has power i have connected it to the pc via the cable (COM port is it) but still no joy. tuner studio cannot find the ecu. I have tried installing COM port driver software but that didnt seem to help Any ideas?

[Scoff]

com port driver software ?

are you using an old laptop with real serial port or a horrible usb adaptor ? the usb adaptors are notoriously unreliable for this sort of thing!

you're serial lead, it should be a straight-through lead, not a null-modem (cross over) with gender changer, etc. Check the lead, pins 2, 3 and 5 should be connected from end to end. Probably some others but only 2,3 and 5 are required for MS.

[SCHWARTZ]

com port driver software ?

are you using an old laptop with real serial port or a horrible usb adaptor ? the usb adaptors are notoriously unreliable for this sort of thing!

you're serial lead, it should be a straight-through lead, not a null-modem (cross over) with gender changer, etc. Check the lead, pins 2, 3 and 5 should be connected from end to end. Probably some others but only 2,3 and 5 are required for MS.

Yeah using old laptop with proper port. The lead is straight through but has two male ends and uses a gender changer to connect to the MS. Should I get a lead with one male end and one female?

[SCHWARTZ]

bought a proper lead with no gender changers etc...

[SCHWARTZ]

another question the ecu has a map sensor fitted mpx4250ap/k0822aw google says its 36psi max so it will only let me run 22psi right? is there another map sensor like this only something like 42psi? can i run an external map sensor or can i un-solder the old one and solder a better one in?

[Scoff]

Yes, they come with a 2.5bar sensor as standard, so 21/22 psi boost maximum. You could probably change the internal sensor for a 3 bar. RS sell PCB mounted 3 bar absolute sensors.

[SCHWARTZ]

I could only find places in America who sold them found 3 and 4bar sensors. Who are rs then?

[SCHWARTZ]

http://www.symtechlabs.com/catalog/s...4994848903cb96

found the same here they do a 3bar for $36 as well but was thinking of going for the big boy if it wont cause any trouble?

[Scoff]

don't put a 4 bar in it, you'll just ruin map resolution for no reason. motorola mpx3600 is the 3 bar version, but they're not very common. RS used to do them, I just had a look and they're not listing the version with a hose tail, only the open type that doesn't lend itself to accepting a pipe

[SCHWARTZ]

what about these matey? i assume this is also an open type

http://www.symtechlabs.com/catalog/s...4994848903cb96

[Scoff]

err, no that one should be fine since it says "for megasquirt" The open type has no where to push a hose on to . The proper one allows connection of a 3mm hose. I've got a couple of mpx6400 here (4 bar) but no 3 bar

[SCHWARTZ]

I was only really planning on running 2bar boost so as thats in the capabilities of the 3bar map sensor would it be more accurate as it only has to read up to 3bar within 0-5v and not 4bar
Would a 4bar really be that noticeable then?

[Woznaldo]

I've bought a few bits and pieces of these guys and they have always been very helpful. They mainly supply Megasquirt stuff but, a lot of it is generic.

Here's the 4 Bar MAP Sensor that I have fitted:

http://www.diyautotune.com/catalog/m...ion-p-117.html

I haven't had the engine up and running on Megasquirt yet so don't know how good it's going to be but, I haven't heard of negative feedback on them? Scoff's point on resolution is a reasonable assumption if you consider that you are dividing 5v across a larger range.

[SCHWARTZ]

thats what im thinking just need to decide if i will ever run more than 2bar boost I doubt it tho. I will prob go for the 3 bar in that case i could all ways up it to a 4 bar if i need to

[SCHWARTZ]

right ordered a 3bar map from symtech labs, il let you know how i get on

[SCHWARTZ]

got a new lead so now no gender changers. had to install new firmware but now megatune connects. I cant really test the ecu as i dont have a stim and its just wired to a 12v battery, but it says in the dials;
engine map 98 KPa
spark advance 10.4 deg BTDC

do these settings sound about right as a starting point?

[Scoff]

98kpa means the map sensor is working (aprox 100kpa is atmospheric pressure)

10.4 degrees is probably just the initial crank timing and sounds sensible.

[SCHWARTZ]

ok thats good to know, as i have removed that map sensor and the new one should be with me soon.

[SCHWARTZ]

New map sensor is fitted now reads 100kpa blew into the pipe and the dial goes up and down. Have now sorted tunerstudio got it to find the ecu and changed what map sensor is fitted. I will start on the loom soon.

[SCHWARTZ]

Also I remember talking to someone about tacho signal, and how they had bought loads of diodes or something to make up the part needed. Who was this as my memory is shot and I could do with making one up now

[James5]

Also I remember talking to someone about tacho signal, and how they had bought loads of diodes or something to make up the part needed. Who was this as my memory is shot and I could do with making one up now

Wasnt it markey b

[SCHWARTZ]

That's what I thought but didn't want to send him a pm and for him to think what's this nutter on about

[SCHWARTZ]

i have the v3 ecu in this link
http://www.msextra.com/doc/ms1extra/...al.htm#layout3
theres a few pins free on the loon connector so to get the options of launch control and other things would i have to solder the wire into the hole marked for what i want then solder the other end to a free pin, or is it a bit more complicated than that

[SCHWARTZ]

also a wire is soldered into js9 (n2o) and on the loom its labelled tacho is this right?