No fuel at decel
 

Hi guys, another weird one for you.

Right now, Fuel Cut is turned off.
I let ve analyze loose on my tune and it is adding crazy amouts of fuel on low kpa's (decel)

With the numbers below, my afr is reading about 17 AFR at 1.5k rpm on decel.

Why is this happening?
I'm pretty sure I don't have an exhaust leak.
https://cimg7.ibsrv.net/gimg/www.mia...45a673001d.png

Thank you and kind regards,

You should lock autotune out of that bottom row.

https://www.miataturbo.net/megasquir...-tricks-93271/

Ok guys, I found my problem. My Injectors don't like to inject any fuel below 1.5 ms pulsewith.
This is also the reason why i'm having some troubles idling.

This can be fixed by playing with the dead times, right?

There's no "playing" with dead times. Either the dead time is right or its not. If it's wrong your whole ve map will have to be retuned. If you have decent injectors there will be posted dead times available. If you have not great injectors you have some work to do to figure it out.

Hi guys,

After months, I finally found the solution to my problem.
Because I have an 1990 1.6 engine, it was running batch/semi sequential injection by default.
Wiring up fully sequential injection (have an MS3) instantly allowed me to idle at 14 afr without surging.
Problem at decel is also resolved.

Once you go bigger injectors (i have 560cc), sequential is a must it seems.

Kind regards,