AEM FIC help

[shawnitz]

Thank you for the reply! Much appreciate the support!

I have tried various rates of acceleration change (pedal pressing rate), from smooth to fast and car always becomes undrivable when the pedal reach around 90% of travel. Pressing more does not help either. And this is true at any rpm below 4-5k rpm.

I think the issue is FIC fueling strategy. Its just slow to respond to change as fueling goes from sequential to batch fire in open loop wide open throttle. I say this because the car drove completely fine without coolant temp and O2 sensor during warmup. Due to the fault (ECU OL-Fault), it spray in batch fire the entire time. Yet it switches to sequential when the engine gets hot even without any coolant temp input!

Im not sure if Boomslang harness has the mod already.

Could you share a map you are using with 1NZ please?

[06YarisRS]

Originally Posted by shawnitz

Thank you for the reply! Much appreciate the support!

I have tried various rates of acceleration change (pedal pressing rate), from smooth to fast and car always becomes undrivable when the pedal reach around 90% of travel. Pressing more does not help either. And this is true at any rpm below 4-5k rpm.

I think the issue is FIC fueling strategy. Its just slow to respond to change as fueling goes from sequential to batch fire in open loop wide open throttle. I say this because the car drove completely fine without coolant temp and O2 sensor during warmup. Due to the fault (ECU OL-Fault), it spray in batch fire the entire time. Yet it switches to sequential when the engine gets hot even without any coolant temp input!

Im not sure if Boomslang harness has the mod already.

Could you share a map you are using with 1NZ please?

Interesting. Where did you get the info on the sequential and batch fire sequences for the 1NZ? I briefly toyed with the idea of disconnecting the wideband to see if the car would stay in open loop. Then I could just adjust my fuel map to get my desired AFRs without the ECU trying to trim out the added fuel. I guess it doesn't work that way, though. I'd be happy to share my map, but I have the 2ZR engine and 440cc injectors.