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Old 03-11-2014, 02:16 AM   #1
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Default Igniter keeps failing mspnp2

I have a 90 Miata with 96 bp. 1.6 coil pack and 1.6 cas. Running Megasquirt pnp2 i fried one igniter when i first started it. Replaced it, drove 28 miles, shut it off for an hour went to restart and fried a second igniter. Also when it was running on all four when i would open the door the idle would kick up and partly surge. I have no tach, and interior lights do not turn on until the ignition is turned forward. All grounds seem good. Can any one help.

Last edited by mckabe; 03-11-2014 at 02:32 AM.
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Old 03-11-2014, 02:54 AM   #2
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What are your dwell settings? I'm not entirely familiar with MS but does it have variable trigger voltage to potentially drive some of the Toyota coils that require a 12v trigger?

I believe the Miata ignition module is designed to operate off of a 5v signal.
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Old 03-11-2014, 03:05 AM   #3
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Attached are some pictures of my settings.
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Igniter keeps failing mspnp2-img_20140310_215033_416.jpg   Igniter keeps failing mspnp2-img_20140310_214946_222.jpg  
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Old 03-11-2014, 04:35 AM   #4
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Not a MS guy, but maybe has something to do with this, combined with a wiring problem?
https://www.miataturbo.net/megasquir...circuit-33964/



mod edit.

Last edited by Braineack; 03-11-2014 at 08:51 AM.
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Old 03-11-2014, 08:52 AM   #5
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Quote:
Originally Posted by mckabe View Post
I have a 90 Miata with 96 bp. 1.6 coil pack and 1.6 cas. Running Megasquirt pnp2 i fried one igniter when i first started it. Replaced it, drove 28 miles, shut it off for an hour went to restart and fried a second igniter. Also when it was running on all four when i would open the door the idle would kick up and partly surge. I have no tach, and interior lights do not turn on until the ignition is turned forward. All grounds seem good. Can any one help.
sounds like you have a wiring issues that's causing havok. fix your wiring issue.
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Old 03-11-2014, 11:24 AM   #6
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Spark output with an MSPNP Gen 2 needs to be set to Going High; you have it set to Going Low.
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Old 03-11-2014, 11:28 AM   #7
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So you think that is the problem? is the transistor mod for going inverted needed on the pnp 2
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Old 03-11-2014, 11:49 AM   #8
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Quote:
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So you think that is the problem? is the transistor mod for going inverted needed on the pnp 2
yes that's a problem. ( I didn't notice it before).

did you change it for any reason? Or were you randomly loading maps onto your MSPNP2?


stop reading about the transitor mod. you dont need to mod your MS, you need to correctly tune it so you dont break ****.
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Old 03-11-2014, 01:21 PM   #9
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I loaded a base map, no idea how that changed. I'll fix it tomorrow when I get my new igniter. Thanks for the help
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Old 03-11-2014, 02:13 PM   #10
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Quote:
Originally Posted by mckabe View Post
I loaded a base map, no idea how that changed. I'll fix it tomorrow when I get my new igniter. Thanks for the help
You loaded *what* base map?

Tune settings and project config appear to be from a different ECU.
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Old 03-11-2014, 04:11 PM   #11
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The 90-93 tune on the Megasquirt disk
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Old 03-11-2014, 11:17 PM   #12
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Do all the other settings look okay?
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Old 03-12-2014, 10:13 AM   #13
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Quote:
Originally Posted by mckabe View Post
The 90-93 tune on the Megasquirt disk
Negative. We've never released a basemap with those settings. I just verified the current and all previous builds of our software.

You can download the most current basemaps here:
MegaSquirtPNP by DIYAutoTune.com

It also appears that you are using a project for a MS2, not a MSPNP. So it's quite obvious you're not using the setup from the included cd.
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Old 03-13-2014, 12:15 AM   #14
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well , reloaded the base map, adjusted timing, started and drove for a bit. I stopped for gas and when i went to restart it wouldn't start. No spark.
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Old 03-13-2014, 09:43 AM   #15
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Please post a copy of the map pulled off the ECU.
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Old 03-13-2014, 09:57 AM   #16
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Quote:
Originally Posted by mckabe View Post
well , reloaded the base map, adjusted timing, started and drove for a bit. I stopped for gas and when i went to restart it wouldn't start. No spark.
did you really reload the "basemap" for someone else's ECU with the improper settings for YOUR ECU and expect it to work after it failed twice before?
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Old 03-13-2014, 05:08 PM   #17
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No, I reloaded the base map from the link posted above. Started from scratch.
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