drgoodwrench

Looking to set up a stand alone ecm for a 91 1.6 liter. Need the following basic info:

ISCV Pulse width Frequency and duty cycle range
Power steering switch input (+12v or float to ground?)
A/C compressor switch input (+12v or float to ground?)
Clutch switch, looks like a float to ground, but is it supposed to raise or lower the idle when grounded?

Using stock 1.6 injectors. at 8PSI, what % duty cycle are the injectors running, or do I need to go bigger (system will never run morre than 10PSI boost).

THANKS!

Duckie_uk

iTrader: (1)

Search much?

drgoodwrench

Under ISCV I only find my own posts

Matt Cramer

Probably because most people have been calling it an IAC - different terminology. If your standalone is a MS, you'll find the IAC settings in the MSQ file for the MSPNP.

drgoodwrench

Thanks. From the FSM saw the IAC as a temp controlled bypass, while the ISVC is ECM controlled. I have a DIY ECM, not a MS, so I am starting from scratch. Will search under IAC, Thanks.
So people have complaints mostly they can't run their A/C properly? And no CEL so they can't pass inspections?
Any other major issues for daily drivers? I'd like to try my hand at a fix for each.

drgoodwrench

bump

The_Pipefather

iTrader: (5)

download the msq file from the mspnp website for your engine and take it from there.

http://www.megasquirtpnp.com/models/...with%20AFM.msq

And here's a 1.6L pinout which should hopefully answer your other questions:


How about posting some info on your DIY ECM? Sounds interesting. Maybe a few pictures.

drgoodwrench

Thanks for the file and the pin out, big help.Here are some quick pixs, I'll add more as I go along. I'm sure I'll have alot more questions.
Thanks again.
Here is the unit. Built inside the stock box.

drgoodwrench

and here are a few pics of the car build.

The_Pipefather

iTrader: (5)

wow, impressive. is the ECM a commercially available product? doesnt look like a prototype at all.

drgoodwrench

Potentially this will be available soon, IF I can get all the accessories and the code flash to work correctly. If not, then perhaps as a "for off-road use only" item.

jwx

Did you build that one yourself? If not, then who did?

drgoodwrench

My company builds these units for CNG powered heavy duty vehicles (buses, trucks etc). I'm just playing with this unit to see if we can get a decent result for the Miata track car. If so, I'll make some available real cheap for those willing to share their files with me!

arga

I assume based on another post that this is one of the OmniTek EM series.

This line on your web page blew my little Megasquirt world away:
"The Omnitek EMS offers self diagnostic capabilities (OBD)"
Now if you could output OBDII codes...

Is this a new model? EC44-M maybe?

BTW, it's nice to have someone w/ your racing back ground on the board. Welcome.

drgoodwrench

This is actually an EC66, capable of driving a 6 cylinder. The EC44 runs this little beauty on E85


read a bit more about it here..http://www.autoblog.com/2008/02/25/b...h-the-fun-cup/

I am working on the OBD II outputs.....

drgoodwrench

Oh and thanks for the Welcome!