Weird Fuel Enrichment
 

There is this weird enrichment that is happening when I clutch in, or stop at a set of lights. The A/F will suddenly go very rich (around 11:1) for around a second, and then go back to 14.7.

It only does it at low speed and low rpm. For example, if you clutch in whilst moving, the A/F goes instantly lean as it should.

Has anyone found out what table controls this enrichment behaviour?
I ask because it is making my car want to stall every time I come up to a set of lights! I have raised my idle and increased timing at idle to help, but on occasion the car will still stall.

Thanks for your help in advance!

I have been trying to find this table for a looong time now - no luck so far.

What are your mods? Are you running a stock rom or a tephra rom? Are you on speed density? I was having issues with stalling when I would leave from a light, my wideband would go to around 9.8 and I would have to punch the gas to get it to lean out. It just turned out I had my MapVe table set way to high(speed density).

Sorry should have posted this info before, I'm running Tephramod v7 96530706.
I'm still using a MAF.

have you tried zeroing out the decel tables?

there u go thats ur problem... using 9653

i had a lot of issues, read a lot of threads changed soo many values in tables increase idle sensitivity etc with 9653 on my jdm8mr... moved back to 9626 and they sorted with the default values.

i think its either to do with one or two sensors being in different ADC channels than the 9653 rom requires or the lack of EGR system causing issues.

Car ran like a champ with stock injectors/turbo, it's just playing up with FIC1050s.
Mind you, the car did still enrich at low speed/rpm, but it wasn't as bad, and didn't make the car come close to stalling.

ahh yeah i had fic1050s too... maybe its the injector size. causing issues. as i said with AC on the car will stall at any traffic light... test it out mate :)

EDIT: if u fix all the issues let me know... would love to be back onto V7

ziad, have you tried comparing values for all of the ISCV tables (I mean all of them that mrfred found and that I found for 9653 and 9694)? 9653 has very different values than other ROMs and I'm guessing that all of your problems go back to those tables. Those decel tables, as mrfred metioned, are actually ISCV tables. I'm guessing they aren't defined for your ROM, but if need be I can give it a go if you can't find them. It's a pain in the ass, but I can help.

Anyway, I'm running 9653 (was originally on 9694) and the only thing I ever did was adjust the biss because at that time, these tables weren't defined. I've never had any stalling issues on this ROM. Injector scaling and latencies can also have an effect, of course.