Hi All,

I am looking at buying a used G35 sedan. I test drove one for the first time the other day. It was a 2006 with about 35k miles on it.

The car handled great but the main issue I had was the acceleration. When I "punched" the gas, there was about a second delay from the time the car responded. I was a bit suprised, because I though the G35 was a performance sedan. I expected the gas petal to be more responsive to the throttle. Once the car got up to speed, it moved nicely, but the lag time from when I pushed the petal until the car picked up speed was way too long for my taste.

Is this normal?


Thanks.

 

Which previous car you coming from?

A) Its not manual, so you will have a "delay"..
B) Were you in 5th gear and then floored it? Or dead stop?
C) Throttle body / accelerator cables could use a bit of grease/cleaning?

 

Thanks for the response. I floored it from both a dead stop and from cruising about 30MPH. I currenty drive a GMC Yukon, which has a larger V8 (although weights a lot more, obviously). Even though it's a truck, the throttle response is pretty good. I've driven all types of cars and never had a delay so long from the time I pushed the petal until the time the car took off.

 

these cars adapt to the way they are driven. if one is always light on the gas pedal, the vehicle will have a lazyness to it.

redline it on occasion. it will wake up.

also, install a grounding kit. they have been said to reduce shift lag.

 

the car was probably driven like a grandma (which is good). These cars are drive by wire so there can be a delay, but their are reset procedures you can take to improve things. Also you are coming from a torquey V8 truck to a V6 that gets power in higher RPMs. The good thing is the ECU will adapt to more aggressive driving styles as you drive the car.

 

Two things one like it was said there is an adaptive ecu you can try resetting the ecu with a pedal combination you can find on here i did it and it helped a little bit on the shift speed, although i did have to try about 6 times to get he pattern right. Also people have had success with grounding wires but i have no personal experience with that.

 

My car does the same thing. im thinking its the spark plug. i dont know for sure. im getting my car tune on my next oil change so i guess we will see if its that or not. plus i hearded that grounding kit is good for automatic .. i cant say its true cause i dont have one yet.

 

Go test drive another one and see if it does it. If it does, then its a G thing, if not, its that car.

I dont know what you are talking about though.

 

Um... guys, this is an AUTOMATIC. Of course there will be a "delay." There will be a delay from a manual too if you were to dump the clutch and punch it from ~1k rpms.

 

Here we are on this "ECU learns your driving style" thing again. Last time it came around, it turned out nobody could actually document it. The only documented learning that takes place is recent fuel octane, and the timing will be adjusted for that.

Yes, there are several reset procedures that can store setpoints for idle speed, full throttle position, etc; but has anyone ever found any proof of this "learning" business?

Thanks!

 

The transmission ECU (ie TCM) does in fact learn your driving style hence the term "fuzzy logic". Drive like grandpa and the tranny will shift smoothly and early. Drive like a 16 y/o and the tranny will hold gears longer and up line pressure to increase shift firmness. The ECU, on the other hand, does not "learn" the driver. The only learning it does is adjust conditions, specifically atmospheric and engine temp.

 

just and a k&n filter or simply turn the vdc off, lad will be reduced

 

We can always count on Dave to set the record straight!! You da man

 

Thank you for the clarification, Dave. I understood "ECU" in the earlier messages in this thread to mean Engine Control Unit, thus my comments about it not "learning."

I'll look deeper into the TCM issue. Can you suggest a place for me to start reading about it? Thanks again!