rom_nb

Hi guys,

I have this issue when i start the car when the engine is cold i cannot rev it over 1500-2000 rpm until its warmed up.
Video for reference:
https://dl.dropboxusercontent.com/u/17374607/Miata%20tune/Video.mp4

I started to look everyday before i start the car on the water temp and IAT
in a day with 10* the car ran perfect
in a day with 15* i had the issue
in a day with 13* i had the issue
when i leave the car in an underground parking its around 30* and i am also having this issue.

I thought it was something with the WUE although i used the automatic option, it set the values from 30*-60* to 100 (which means its off) so i dialed in some numbers going linear from 20*-60* and still the issue persists.
I also tried to increase the number of the WUE live, i saw the temp and i increased the value of the WUE while the engine is running and still the issue is there.

I've added my tune:
https://dl.dropboxusercontent.com/u/...ne25_01_17.msq

A bad 1000-2000 rpm log:
https://dl.dropboxusercontent.com/u/...-05-59-Bad.msl

A good 1000-2000 rpm log:
https://dl.dropboxusercontent.com/u/...14-38-Good.msl

I cannot understand what can causes this behavior...
Any clue would be great!
Thanks!

Matt Cramer

Looks like it's running too rich.

rom_nb

Issue was resolved, the issue was too much fuel, but when i decreased the fuel via fuel ve table, i was too lean when hot but ok when cold, i found that the MAT air density can change the entire fuel table from rich to lean according to the intake manifold temp, so by changing it and making the afr leaner on cold (12-13) solved the issue. Thank u for the help!