Yep, that's what I was trying to say back in post 2...

 

Yes Coleroad, I agree. One would think that a car like the SC430 that is supposed to be sporty would not have grandma programming in it. But it is what it is...

 

Harold, you are so correct in what you were saying!!!

 

...we have to remember, who this car was targeted for when it was introduced...lol

 

If only they had asked us first!

 

thank you to everyone who has responded. I will get to work asap on all the suggestions. And report back...James

 

So, The answer to the lag is reset your ECU? Anyone know an aftermarket ECU that could work and be replaced with this ECU? Sorry, I'm new to the car game.

 

Glad that was it. Just drive it like you stole it more often. Lol

 

I'm not aware of any nor do I remember anyone writing about it on the forum.

 

Understood...

 

I concur with Harold's recommendations. I brought up the same question a while ago and Harold recommended the door/key/pedal sequence to me and it did help. For a while at least.

I am planning to do the transmission valve pressure mod this spring/summer and I have been trying hard to study what I can to figure out if it is possible to just turn off this silly learning feature. It saves on gas, definitely, but it is a bit embarrassing when you try to go and the car just lags.

 

Yes, unfortunately, after the reset the ECU starts over its granny adjustments.

If you could find a way to put that de-acceleration beast beast to rest, you'd be enshrined in the SC430 Hall of Fame just on that one accomplishment! The first time I experienced it, I realized that it is not only annoying but dangerous. If I have to accelerate out of a bad situation on the highway or street and the ECU decides otherwise, it could easily become crunch time, if you know what I mean.

 

Wouldn't an ECU replacement fix this issue?

EDIT: Considering, if you could find a suitable replacement.

 

The problem is that "if" in your statement. No one has found a suitable replacement yet.

 

The new ECU would do the same thing. The ECU learns how you drive the optimizes shift points, downshift points. It just seems as though the sc430 takes this to a bit more of an extreme. Like I had said, I have seen and heard this on other cars. I wouldn't have explained it as bogging down. More as lazy, not down shifting till wide open throttle. Shifting early, so as causing slower acceleration. A new ECU will just do the same leaning process. The only answer is yo reset it if it becomes this way, or drive it harder sometimes to change the learning process. Hence my half joking comment about needing to drive it like you stole it more often.