would this crack cause car not to go into boost?

[525gte]

Ne points are going to be unique to where you need tuning also the throttle percentage for the high map i set 74%-75% i would not touch the low map as it will mess with the closed loop the ecu will take car of this.

The ecu will take care of the low throttle. ..butwith big cams u and injectors u will have to pull fuel at a idle to get it tto go closed..
I pull 8 percent at 1k on the low to get the car to go closed loop

 

[-AR-]

Is your AFs at 13.4 to 14.7 at WOT or when it's in closed loop(part/low throttle)?

I've done some playing around with closed loop tuning on an SAFC, but only for cold starts. From dead cold starts the car idles around 10.0s to 11.0s AF, once it warms up and starts cycling my AF bounce 14.3 to 14.7 at idle/part throttle. If you dipping 10s at low throttle, I'd say replace your o2 sensor and it should clean up quite a bit. This is of course with 440cc injectors and a stock ECU.

ive got 550s.. ill try go zero on lo-throttle and see how it reacts..my idle and lo throttle is fine now but ill zero it to see if the ecu figures it out...

 

[-AR-]

Is your AFs at 13.4 to 14.7 at WOT or when it's in closed loop(part/low throttle)?

I've done some playing around with closed loop tuning on an SAFC, but only for cold starts. From dead cold starts the car idles around 10.0s to 11.0s AF, once it warms up and starts cycling my AF bounce 14.3 to 14.7 at idle/part throttle. If you dipping 10s at low throttle, I'd say replace your o2 sensor and it should clean up quite a bit. This is of course with 440cc injectors and a stock ECU.

im on 550s.. i tried running zero on lo throttle but afrs go to 11-13s... ill try a different o2 later...

 

[90-1jzsupra]

i had the same problem i covered all the cracks with grey RTV silicone solved my problem hope this helps