hole while acceleration
 

Hi everyone,

I recently powered my 2000 1,8l Miata Turbo with megasquirt PNP2 and I enjoy it. But when I'm WOTing, around 4500/5000 RMP BIG hole appear.
My AFR gague says 11:1 or movnig around 10:1 and I've try tuning ignition and fuel management... Ignition at 8° now.
Is it becose knock sensor is working??
Anyway at 6000/7000 RMP Miata is great!

Do you have any idea?

Post tune and log. What do you mean by a BIG hole?

wat

I hate it when my Miata opens a hole in the space time continuum too!

https://cimg6.ibsrv.net/gimg/www.mia...ff1135c786.gif

Got a nasty hole in the fuel map.

I think he means its like a stock BRZ/FRS

:laugh:

Ahah :D I'm a frenchy so when I said "hole in acceleration" I mean taht when I'm WOT, engine stop accelerate brutally as a stop ignition. And When I realese accelerate pedal it's ok agan. But I can rev "slowly" and take 7000rpm
I use base map in PNP2 with 8° timing an a bit more rich injection on map:

https://cimg0.ibsrv.net/gimg/www.mia...c15613817b.jpg
I've raise this map of 10 scale


https://cimg1.ibsrv.net/gimg/www.mia...3407ad6f5f.jpg
I decrease this map of 1° everywhere


https://cimg6.ibsrv.net/gimg/www.mia...6557d1e008.jpg
I've raise this map of 10 scale and select "folow AFR table" on general setting

I don't have an answer to your question but if you post a log of when this occurs, it may help these guys figure out what's happening.

Sounds to me like overboost protection. If you go into the Boost Control settings of Tunerstudio you should be able to make changes to the parameters for Overboost protection, chances are it is set too low and you're hitting that threshold at WOT. Also if I recall, you want to set it to both fuel and spark cut.

yes good idea, I'll try to do it.

Indeed, I'll check it but I guss it's unchangeable on my set up.

Anyway thanks guys It's good ideas.

In addition to posting datalogs, post your latest tune as well.