Car runs rich between shifts. BOV is recirc. Help

[Clutch450]

Ok so after reading this thread:
http://www.dsmtuners.com/forums/newbie-forum/352863-bov-doesnt-blow-off-when-revving.html

I read that a vented BOV will cause your car to run rich between shifts. Well my Greddy Type S is recirc and everytime I shift or let off gas and coast my wideband goes from reading 14.7-15.5 down to 11-12.5. Meaning its running pretty rich between shifts. I'm asking why this would be. If my BOV is recirc already?

 

[viperlp01]

Well when you recirc you will still run rich on shifts.. Your ecu is reading an x amount of air that is alot higher than when you let off the throttle. So the ecu cannot compensate fast enough to keep the a/f lean.. When you vent the a/f will slam closer to 10.0 and will hurt performance because the ecu is trying to equal out the a/f but the air is nolonger there.... It is normal.. I run a gm maf and when i shit it goes to 12.0-11.5ish..

 

[Clutch450]

Alright thank you. Just needed to be a little more informed on it. Thanks again

 

[92nolatist]

Sorry about bringing this thread back, but I know there are a hundred more about rich shifts so I didnt want to make another one.

I have this same problem and my gas mileage isnt what it should be. I run a gm maf in blow through setup and Im also running Link, is there a way to tune it leaner in between shifts??

 

[jtmcinder]

I run a gm maf and when i shit it goes to 12.0-11.5ish..

Verrry interesting. Vut other things about your car make you think of bowel moments? Or, maybe, ve talk some more about your mother, yes?

- Sigmund Freud

 

[ALBurgundy]

I have this same problem and my gas mileage isnt what it should be. I run a gm maf in blow through setup and Im also running Link, is there a way to tune it leaner in between shifts??

Aligning your maf comp better will help this.

 

[92nolatist]

How would I go about doing this? Im still kind of new to Link, does that mean using the global scalar button?

 

[ALBurgundy]

After you watch all the demos on link a few times do what they say

Set your base injector settings
Then get your airflowperrev and get your combined ft in line.

Then do a rough maf comp and do this a few times DSMlink MAS/MAF Calibration Page
mix that with adding fuel where you need/adjusting timing when you need.


That is a very broad and basic explanation of how to go about the tune.

 

[92nolatist]

Ive already done the base setting and gotten my airflow and fueltrims in order. The problem is when im in boost, theres a really bad fluttering goin on (have another thread about this), so I cant do the wot calibration. But other than that, I have a general understanding of link; I thought there was something else that could be done to lean out the fuel between shifts. I guess I just need to mess around with it some more. Thanks.