Total newb here. I followed the MegaSquirt PNP Gen2 Documentation and installed the MS9697PNP2 into my stock 96 miata. The car ran great on the OEM ECU with 14 degree timing bump. I read the Tuner Studio MS New User Guide, MegaSquirt PNP Gen2 Manual and searched for similar forum posts.

My issue is that the car leans out and stumbles off idle. I can feather it, but if I blip the throttle from idle it falls on it's face. Runs and pulls pretty well throughout the rest of the rev range.

Base map for 94-97 1.8 from Megasquirt's website

Base timing has been set and verified per the installation document

MTX-L grounded at the post by the throttle body and calibrated as:
Point1: 1.0 9.7
Point2: 3.68 18.2
Reads within 0.2 of what TunerStudio sees

TPS has been calibrated

Barometric Correction total vacuum(%) and rate(%) set to 0. Barometric correction curve is set to 100%

Required Fuel is set as:
1800cc engine size
265cc injector size

Still using the MAF

Thermistor Measurements are:
2490 Ohms
-4 16150
104 1150
176 330

Here are my tables:









A tune and short log of it idling and revving attached.

I drove around with AutoTune on and it did modify over a 100 cells. Do I just need to make the cells where it stumbles richer? That makes the fuel table really odd looking. Is it a setting that I'm missing? Any help would be greatly appreciated!!

 

Follow up: I've read more similar threads, adjusted my tables further and auto tuned.







I also disabled EGO control and played with the Acell Enrichments. I set it to 50/50 split between MAP and TPS like I saw another member do with a similar issue.



The car doesn't have as noticeable off-idle stumble anymore, but the AFR still goes super lean for a moment with any throttle input from idle.

Am I moving in the right direction here? I would love to hear your feedback!

 

Looks like it just needs a little more AE.