OK I have been decent with mechanics, but more the bonehead wrenching stuff rather than engines (brakes, exhaust, repairs). I have been spending the last year or two getting to know the Miata pretty well, and took the plunge with a turbo install project. I bought used stuff based on a Begi-S with a FM intercooler added. With advice from Reverent and Braineack I should have what I need.

Dimitris was kind enough to create a MS2v3 for me, which I have plugged in, and I have put in RX-7 460cc injectors. I have other things on deck, ready to go in. I had a little trouble getting the stock precat O2 sensor to budge so my thought is to leave that in for now, and put in the LC1 with the new downpipe.

I downloaded Megatune and have the laptop poised and ready to turn it on. The coil is disconnected and I guess I am ready to talk to the megasquirt. Wish me luck!

 

use TunerStudio instead

 

MegaTune won't work with this ECU. Use TunerStudio instead.

 

Argh! Foiled before I began! Thanks for the tip, I didn't see that, but I had been reading about Tuner Studio and its excellent reviews. OK, back to the drawing board. Hopefully this will not be a comedy of errors.

 

I'm not sure what I am missing now. I installed tunerstudio, set the parameters for the 460cc injectors, told it that it was narrowband, 1839cc displacement, etc. etc. The car does not start up when cranking though. The gauge panel in the TS interface does not show anything for the air/fuel ratio. Is that because I have not yet installed the wideband? Or is it going to be like this with the narrowband in place? Or is it something else entirely and I have missed a key step?

So far I have not yet attached DB15 plug to anything.

 

The wideband signal is brought in through the DB-15. Specifically, on the grey wire. Lookup the .xls I sent you a while ago. Do you have an RPM reading in TS while cranking?

 

Yes I have rpm, its like 240 or so. I understand the issue about the DB-15 wideband signal, but I have not put that monitor in yet, and the wire is not hooked up to anything so far. Is that the problem?

 

Probably fueling. Can you take a datalog?

 

I will figure out how!

 

This is some data from today. I am not sure which program opens it exactly.

 

That file is completely empty. When online in TunerStudio, click Start datalogging, name the file, and then start your attempts to start the car. Give it a few tries, then click stop datalogging and post the file here.

The file opens with MegaLogViewer.

 

OK I downloaded megalogviewer. This one does not seem to be empty.

 

It is not empty, but I don't see any attempts to start the car inside the log - RPM is always zero, the MAP sensor signal is roughly the same at all points. Btw calibrate your TPS.

 

Odd. I tried to start it 3-4 times during that log period.

 

TPS is calibrated.

 

Use this one. I understand now how this works. I hear a little stumbling and smell some gas. Probably ignition.

 

Have you changed anything in the basemap that came with the unit? If you did, post your new map here (File -> Save tune as)

 

I certainly may have changed things, I've been fumbling around trying to get the car to start.

 

Yoy had effectively disabled sequential inejction by turning "bank 2 specific settings" to "off" and in sequential settings from "additional drivers" to "standard drivers".

Try the attached msq.

 

Thanks. Actually I had just done that yesterday afternoon after mucking around unsuccessfully trying different things. I will try this set-up. If it doesn't work, I will reconnect the old ECU to see if it runs then; maybe I inadvertantly created a mechanical problem.