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First time mspnp2 setup

 
Old 01-02-2019, 09:40 PM
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Default First time mspnp2 setup

1999 Miata, NB2 injectors. So I changed mmy REQ from 12.7 to 11.5 (since the injectors are ~10% bigger)

Got it setup all the way to timing light verification. Set it to fixed value 10 degrees. Hooked up timing light, and it was all over the place (engine struggling to idle ~500rpm). Gave it some throttle and the engine smoothed out and timing light showed 10 degrees. Good.

Changed it back to "use table" and it can't hold idle - or it struggles at ~500 rpm. I'm currently on the recent basemap from DIY. I think I need ti restart the TS project since I chose wideband even though it's still currently narrowband. Have an aem uego going in soon. Maybe I should start there.

The next step was going to be changing the ignition map on the idle section per...
Mega Miata: REV1.1 Idle spark settings


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Old 01-02-2019, 10:04 PM
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Did you change the injector dwell time when you changed injectors, or just the required fuel?
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Old 01-02-2019, 10:10 PM
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Just the REQ
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Old 01-02-2019, 10:22 PM
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Im sure someone more knowledgable than I will chime in but granted your independent variable change you're either in some cold start enrichment, or your dead time is off, or both.

https://www.miataturbo.net/ecus-tuni...ad-time-56061/
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Old 01-03-2019, 01:03 AM
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Alright things on my todo list...

Change from Wideband to Narrowband (until the actual wideband is installed)
Change the ignition tables so that the idle zone (<1000rpm and <60kPa is set to 10 degrees with the lowest rpm column at 12 degrees). Any issue in changing the entire column to 12 degrees and 10 degrees (all the way from 0 kPa to max kPa) at the first two columns?
Look at PWM Idle duty cycle and add % to increase the idle (or to see if the idle increases).
Look at closed-loop idle valve closed/open settings.

Check to see if there are any leaks in the vacuum line to the MS.
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Old 01-03-2019, 06:56 AM
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1st add wideband.
2nd add megasquirt.

To do this in a different order doesn't make any sense.

You're changing your fueling and have no idea what your ratio is. It's like putting on a blindfold and guessing whether the traffic light is red yellow or green.
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Old 01-03-2019, 11:42 AM
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Mmmmm. Thanks for that. I thought that I could get it up and running prior to the wideband install.
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Old 01-04-2019, 03:29 PM
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Could does not mean you should, there's a lot of things you could do, many of them not recommended, or illegal, etc.
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Old 01-04-2019, 04:06 PM
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Got it. I did start a fresh basemap with narrowband and it seemed to help the start. Ignition tables were set to 14 in the idle regions. Looked at the VE table and saw where it was hovering and it highlighted the whole idle zone and kept lowering the values until the car idled nicely. After that I just changed the whole section to a static value - 34.

Car starts and idles smoothly.

The cranking RPM in the basemap was 10. After the car was warmed up...it was going no where...megamanual recommended 300. Starts up better but still meh. Anyone have a better value for this?

So far so good. Now need to install wideband.
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Old 01-05-2019, 07:53 PM
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Got the wideband installed. Idle was approximately 13...woot. Still trying ti work out a few bugs. Idle, cranking, and gas tip in.

Currently MS is sticking the AF ratio at 12.10. I hooked up the UEGO signal by extensions on the factory o2 harness. Will probably need to address the sensor factors. Only set it to wideband but haven't adjusted voltage, etc.
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Old 01-06-2019, 01:06 AM
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Disregard. #idiot. Starting here...

https://www.miataturbo.net/megasquir...g-guide-98277/

Will come back after I go through that.
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