Fatvod

Hey guys. I have a 1992 miata 1.6. 550cc injectors, and a MTX-l wideband with a MS3 built by Rev. I got everything wired up recently and im trying to get the car to idle so I can set the timing. The car fires with a pop usually and idles fine for a second then the AFR starts climbing and the car starts to die. Any ideas? Heres a datalog

Fatvod

Some tables
Fuel:

Spark:

AFR:

Fatvod

And a picture of attempted idle

dieselmiata

iTrader: (3)

From the manual:


Afterstart Enrichment: If the engine tries to start, but dies right away, you need to adjust the after start enrichment. Generally this should be between 25-45% for 100 to 250 cycles,
Warmup Enrichment: If the engine starts but dies after a several seconds or minutes, then you need to adjust your warm-up enrichment. Use up to 15% greater than the defaults if that seems to help.
VE Table: Adjust the values at the idle kPa and rpm to get it to idle. You want to change the VE table entries while watching the engine MAP (in kPa) to try and lower the MAP as much as possible. Do this after the engine has warmed up. As you do this, the engine rpm will rise, and you may have to adjust the throttle stop on the throttle body to lower the rpm back to the desired idle speed. Once the idle VE are tuned, you will have to retune the afterstart and warmup enrichments.

Fatvod

Aha! I can get the car to idle now, but it jumps around and wont sit still.

dieselmiata

iTrader: (3)

Are you using autotune to tune your idle?

Fatvod

I was trying to yes, should I not?

dieselmiata

iTrader: (3)

No, you shouldn't. Never use auto tune for idle.

Fatvod

Ah okay, didnt know. Ill try tuning the idle myself.

Fatvod

Got it figured out, thanks.