Ive been noticing that my car takes a pretty good amount of time to "catch up" and return to a normal idling state.

When I give my engine throttle, it drops and stays at around 1200 RPM for a good 10 seconds or more, and the AFR stays around 13 or lower, and eventually goes back to my normal setting of 15.6

I have messed with my ISCV tables to allow 1k idle at warm up, so could this be causing it? I have also set all my open loop tables to zero.

 

I have basically a totally different setup...yet somewhat similar problem I think.

Does it idle fine with the A/C on? off? Did you change the ISCV tables only for colder temps, or did you mess with the hotter temps too? Setting it to open loop just makes it easier to troubleshoot i think...shouldn't be causing it.

 

check you maf scaling and compensation tables in ecuflash..... even when the ecu is using feedback from the front o2 sensor to correct fueling it is still initially using the MAF to figure it out. Sounds like something isn't scaled right in the lower end. I had a similar problem when I set my MAF compensation table to all 128... the lowest cells needed 123 or 121 if I can recall. Try some different settings a report back.

 

my MAF scalings are all over the place, going from 145 for 19 all the way up to 232 for 1600.

wish I wasnt so new at this... not sure what that means

 

yes iscv will cause what you described. just work with the stepping settings more and you will get it sorted. 15.6 is a bit lean if thats the richer it goes on normal idle. it should be around 14.7

 

If you never changed mad scaling, it should be fine (unless you replaced your intake). If you messed with iscv, I'd go back to that. Just post what you have in the ac on and ac off iscv tables. Do you see thee issue regardless of ac status?