sprtdsgnGS

Any thoughts on this? Never happened before but this morning as I was coming to a stop and braking, the car felt as though it was accelerating... 07 gs350, 65k miles

acer0611

How cold was it this morning and had the car reached normal operating temp. It normally happens in cold weather because the RPMS are a little higher to warm up the car faster. If i were you I wouldn't worry about it.

sprtdsgnGS

Even here in Florida it was cold this morning...prob around 30 degrees..I thought the cold may have had something to do with it. Thanks for the info!

acer0611

No problem, that's what we're here for.

ta1972

iTrader: (1)

Is it a down shift clunk/jerk when coming to a complete stop? If it is, I'm having the same issues.

Lexo11

I've had this happen to me a few times already, even under warm weather conditions. How many miles do you have on the car and have you cleaned your throttle body yet?

sprtdsgnGS

No it just felt like it wanted to keep moving forward as I was braking. No hard clunking. Felt as though I had to press the brakes harder to get it to stop. Never happened before to me.

sprtdsgnGS

I have about 65k miles, and have not cleaned the throttle body. Is this something the dealer recommends at any specific mileage? Have you done it and did it help? This was a one time incident for me so far and it was much colder than usual here.

sam12345

iTrader: (1)

The brake is the pedal on the left not the one to the right

sprtdsgnGS

Thanks for taking the time to clarify, douche

sam12345

iTrader: (1)

No car on earth can accelerate when you have your foot on the brake and pushing it hard so hence my clarification.

Gotcha350

It's not recommended at any interval. This car just idles high for a long time when it's cold outside...we had temps in the low 30's last week and it was almost normal operating temp before it idled down.

Steve2424

The same thing happens to me in colder temperatures. I notice that the GS operates better in colder temperatures after letting the temp gauge get to the 4th hashmark, and the transmission doesn't have this happen. Would cleaning the throttle body also help with this as well as idle smoothness?

Lexo11

correct me if I'm wrong but these are the symptoms: Driving at slow speeds and coming to a stop slowly while your foot is on the break you begin to feel the vehicle accelerating on it's own. So you begin to push down on the break but see very little results.


I made a post about a year ago or so about the same issue. I remember the first time it happened to me. I was coming to a stop and put my foot on the break only to feel the car is accelerating on its own Afterwards, it had occurred a few more times and at this point I was more aware of the situation.

I'm assuming the throttle body maybe dirty and isn't able to open and close properly due to build up. I have not yet cleaned my throttle body and plan to do so very soon.

Some insight on this would be appreciated.

Steve2424

^^ Same here. I am going to have my mechanic clean this as well when I do a 60K service on my GS. Is there any pitfalls of this process I should tell him about?

As far as the jerkiness, it's always been in the colder temperatures, BUT only if my car has NOT reached the 4th hashmark on the temperature gauge. I always warm my cars up to good operating temperatures -- usually a hashmark or 2 past the C -- but the GS seems to require a longer warm up time. In this wonderful NY weather recently it's taken anywhere from 15-20 minutes for my car to warm up to the 4th hashmark on the temperature gauge. Once the needle reaches just past the line it drastically reduces RPM's (going from 1K to 600-650) and lets off a shudder due to the RPM decline. I normally wait another minute or 2 so it gets itself "warmer" and when driving it shifts fine and precise.

IF I begin driving after only passing the 2nd or 3rd haskmark, this downshifting/ feeling of unstoppable acceleration under braking happens and goes away (you guessed it) by the time the needle passes hashmark 4. I'm assuming this is when the transmission fluid has reached a good operating temperature. Just my 2 cents if anyone has noticed this.