poor throttle response

[Cockatoo]

Originally Posted by Kodename47

Reset ECU, turn car to accessory. Slowly depress the accelerator 5 times fully to the floor. Turn on car. Its just so the ECU can register 100% pedal movement. That is also why you get dead pedal for a while if you don't. Doing it with the car off is pointless as the ECU isn't powered up.

This works, 20 times is a waste of your energy!

Turn car to ACC or ON?

[unsurety]

Originally Posted by Cockatoo

Turn car to ACC or ON?

I see you have a Monogram - with foot off clutch/brake, press engine start/stop button twice. All the warning lights should be on, gauges will do their sweep thing, but engine is off. I did it at a stoplight (5x full throttle>foot off gas) and the pedal felt much more natural right away, and I think by the next day it was back to what I was used to.

By then I had already put ~90 miles since the map write, so...

[steve99]

Its possible the guys CAI has upset the MAF scaling which is causing him to run high fuel trims in closed loop, when he get on the gass pedal hard its goijg to apply these high fuel trims as corrections in open loop throwing off his afr and possibly making the car feel sluggish or hessitate.

Most intakes are going to require a maf rescale for best results and good low speed driveability. Even stock intakes can benifit from maf scale

To avoid the laggy throttle i found that after flash you just need to turn the car full on dont start, leave throttle alone, wait 15 sec or so turn off, turn on wait 15 sec then start leave to idle for a minute or untill it comes off fast idle and settles at 700 rpm. Then drive , this is first time you touch throttle, no lag :-)

Aparantly ecu runs some kind of checks on throttle and cam actuators after flash or reset just need to let it do its thing without annoying it and all will be sweet

[kiichiro]

Get a tune

[unsurety]

Originally Posted by steve99

Its possible the guys CAI has upset the MAF scaling which is causing him to run high fuel trims in closed loop, when he get on the gass pedal hard its goijg to apply these high fuel trims as corrections in open loop throwing off his afr and possibly making the car feel sluggish or hessitate.

Most intakes are going to require a maf rescale for best results and good low speed driveability. Even stock intakes can benifit from maf scale

To avoid the laggy throttle i found that after flash you just need to turn the car full on dont start, leave throttle alone, wait 15 sec or so turn off, turn on wait 15 sec then start leave to idle for a minute or untill it comes off fast idle and settles at 700 rpm. Then drive , this is first time you touch throttle, no lag :-)

Aparantly ecu runs some kind of checks on throttle and cam actuators after flash or reset just need to let it do its thing without annoying it and all will be sweet

That's even more different than the procedures above. Hmm.

I did the car on, pedal to floor and back 5 times after flashing a new map. It was better than the first time, but still laggy. I also let it idle for 3 mins before touching anything.

[steve99]

Originally Posted by unsurety

That's even more different than the procedures above. Hmm.

I did the car on, pedal to floor and back 5 times after flashing a new map. It was better than the first time, but still laggy. I also let it idle for 3 mins before touching anything.

The another thing that happens when you flash or reset ecu is the fuel trims all reset to zero and have to be learnt again, so depending on how far out your maf scaling is your fueling might be out by 8% or more if you have an aftermarket intake and not rescaled maf.
Untill the ecu relearns fuel trims it might feel a bit laggy or hessitant when you get on the throttle

Tuners will always rescale maf to suit your car and mods and generally your fuel trims will be then very low less than 2% so the ecu hardly needs to learn any fuel trims after a flash or reset.

[unsurety]

Originally Posted by steve99

The another thing that happens when you flash or reset ecu is the fuel trims all reset to zero and have to be learnt again, so depending on how far out your maf scaling is your fueling might be out by 8% or more if you have an aftermarket intake and not rescaled maf.
Untill the ecu relearns fuel trims it might feel a bit laggy or hessitant when you get on the throttle

Tuners will always rescale maf to suit your car and mods and generally your fuel trims will be then very low less than 2% so the ecu hardly needs to learn any fuel trims after a flash or reset.

Ah, okay. All I have is a K&N drop-in. I realize that affects airflow to a degree.

I notice a lot harder pulling starting right before 4k though. Feels like a slingshot compared to stock. It's like the car is egging me on

[steve99]

Originally Posted by unsurety

Ah, okay. All I have is a K&N drop-in. I realize that affects airflow to a degree.

I notice a lot harder pulling starting right before 4k though. Feels like a slingshot compared to stock. It's like the car is egging me on

Yes,

OFT tunes like others make good gains in the "torque dip " region, its not always about top end power, good increases lower in rpm range improve acceleration and drivability.