I am curious if anyone else experiences low end torque lag in their G35 sedan.

I have an AT with about 600 miles on it. The other day I floored the gas from a stoplight and the car didnt really do much for a second. Then when the tach hit about 2000 the engine seemed to come to life and the car took off from there.

Is this normal or is something wrong with my car? On another post I read some people can chirp the tires with an AT without power braking, no way my car is going to do this. Or maybe I need to do an ECU reset, I have been babying it mostly, first time I ever floored it actually.

 

First, you need to disable VDC.

Second, since you're still in the break-in period, I imagine you've been babying the car a bit. It adapts to that, unfortunately. Resetting the ECU is supposed to help. Me, I just drove mine aggressively for awhile and it perked right up.

Plus, you shouldn't push it too hard for another 600 miles.

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

Oh sorry I forgot to mention I had VDC turned off. I will try resetting the ECU after break in, and see what happens. I agree about breaking it in easy, but the other day a modded Saturn challenged me and I just could not resist. Even with the sluggish start the G35 still blew the Saturn away with ease of course

 

Of course. It would take a turbo or supercharger to make a Saturn anything but an economy car. [img]/w3timages/icons/smile.gif[/img] They have what.. 124hp 4-cyl engines?

2003.5 G35 Sedan Desert Platinum/Graphite Premium/Sport/Aero/Nav/Winter

 

my 92 camry LE can smoke that ! wait not really ! but yeah silly saturn ion ! just like those silly 03 V6 Mustangs !

 

You need to get a manual trans.

 

The AT Sedan's ECU program incorporates a drive-by-wire limiter that prevents the throttlebody's butterfly from being opened too fast. The tb’s butterfly also closes as the engine approaches stock 6600rpm redline.

The AT Sedan's stock timing map handles 87 octane gas and the air-fuel ratio richens up (detunes) as the revs increase closer to redline.

We all know the stock ECU program adapts to how the car is driven. However, the ECU still tries to put the car in the "luxury" mode.

 

Thanks for the info DaveO. If I was to reset and retrain the ECU by driving aggresively then will the tb's butterfly still open slowly or do you have to replace the stock ECU to eliminate this? All of the charts I have seen indicate the engine has a very broad power band so it would be a shame to artificially limit it. Thanks again.

 

EricJ,

The TechnoSquare ECU program upgrade fixes most of the AT Sedan's ECU performance limitations. While my car is still not a torque monster, I very happy with the results. I believe this mod was the biggest bang for the buck I've done so far.

DaveO