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Old 05-09-2015, 10:13 PM   #1
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Default 91 Miata No spark - DIYPNP

Yes, I read the whole "92 Miata no spark", no help there.

Helping a buddy out with his 91, DIYPNP. Some strange behaviors here.

We have the exact issues described in the other thread...Kinda?

I'll attach a couple tunes. when we run the "running ish" tune, the car actually fires up and idles "fine", but it sounds like a ******* riding lawnmower when it's running.

When we try to upload any of the DIYPNP website's basemaps, the car doesn't 'see" the cam signal, I think. we get no tach signal, no pulse width, and no spark.

I believe the megasquirt isn't "seeing" the cam sensor on the tune it's supposed to.

The biggest difference between the tunes i can see is that the ignition settings one is "4G63" and the other is "basic trigger". the basic trigger one works, but I'm 90% sure 4G63 is what it's supposed to be... but as soon as we switch that, we lose spark and pulsewidth on injectors.

So:
1 why isn't the car seeing the cam sensor with the correct ignition settings?
2 is there a way to make 'basic trigger' work, or is that a really bad idea?
3 how do we get the car to give us a cam signal, and thus fuel and spark (both pretty important to make a car run...)

VR2 does trace back to pin 25 on microsquirt
Attached Files
File Type: msq MM9093_Miata_321.msq (82.2 KB, 46 views)
File Type: msq running ish.msq (110.7 KB, 61 views)
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Old 05-12-2015, 10:49 AM   #2
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First, please get a composite log of an attempted start; this will give more data about the cam and crank signals.
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Old 05-12-2015, 10:50 AM   #3
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^^^this

+ who built it?
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Old 05-12-2015, 02:06 PM   #4
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I am who built it, I have been emailing Matt back and forth some, sent him my composite log (pictures of) and my wiring set up. Hope to hear of an idea soon!
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Old 05-12-2015, 02:07 PM   #5
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did you load the latest firmware? did you not select 3. microsquirt module (includes DIYPNP)?
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Old 05-12-2015, 02:10 PM   #6
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Latest firmware is loaded. Ms2/extra. Diypnp with micosquirt
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Old 05-13-2015, 03:49 PM   #7
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I helped bruyettemr with the build, we got the issue resolved. Apparently the good folks at DIYautotune advised him to jump VR2 directly to R4 IIRC and it worked perfectly.

Tuning bro-date tonight.
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