My car just accelerated by itself wtf - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stugray · 05-19-2014, 01:37 PM

I will venture a guess:
1 - you had your AC on
2 - The AC compressor was disenganged (cabin was cold & AC cycles on/off)
3 - when the ECU turns the AC compressor back on, it bumps up the throttle to keep the RPMs from dropping
4 - it happened at the only time you would really notice it (creeping into a parking space)

SSchifko · 05-19-2014, 03:07 PM

I have an AT. When the engine is cold, and I do not let it warm up for a minute, I also get the acceleration.
Say I start the car and immediately go to drive and pull forward 20 yards or so then stop the engine will rev up a bit.
I keep on the brakes and it feels like it wants to push me. If I click into neutral it revs up further then settles down pretty quick.

I thought that I saw a TSB for a ECU flash that would take care of this, but my dealer said no go. Only happens during the warmup period for me.

humfrz · 05-19-2014, 03:52 PM

Quote:

Originally Posted by sshole

Aren't you like 100 years old, though?

Well, ya ..... I'm getten up there ...... but, at least it's just a "bit" of acceleration ..... I haven't crashed through any store fronts ..... yet ....

humfrz

humfrz · 05-19-2014, 03:56 PM

Quote:

Originally Posted by Shim

I had that happen repeatedly in a 1996 Pontiac Grand Am, where it was really weird/cramped down there and my feet just didn't fit well. That seems less likely in the FRS unless OP has giant clown feet or something.

Well, now, Shim ..... I don't know about the OP ..... but, I'll have you know, I don't have giant clown feet ...... however, my house slippers are rather roomy .....

humfrz

l0aded · 05-20-2014, 06:38 PM

This sounds familiar.

http://www.nbcnews.com/business/auto...ion-f1C7659318

i kid.

sofrsnsokleen · 05-22-2014, 04:13 PM

It must've happened when it was downshifting to 1st, sounds like the most logical explanation.

05-19-2014, 03:07 PM	#16
SSchifko Owner and Operator Join Date: Sep 2012 Drives: FR-S, Yamaha R6, 1972 Camaro Location: North Chicago Posts: 41 Thanks: 9 Thanked 5 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I have an AT. When the engine is cold, and I do not let it warm up for a minute, I also get the acceleration. Say I start the car and immediately go to drive and pull forward 20 yards or so then stop the engine will rev up a bit. I keep on the brakes and it feels like it wants to push me. If I click into neutral it revs up further then settles down pretty quick. I thought that I saw a TSB for a ECU flash that would take care of this, but my dealer said no go. Only happens during the warmup period for me. __________________ -Schifko

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05-19-2014, 01:37 PM	#15
stugray Banned Join Date: Sep 2013 Drives: 2013 GBS BRZ Limited Location: Colorado Posts: 1,925 Thanks: 627 Thanked 1,445 Times in 711 Posts Mentioned: 41 Post(s) Tagged: 0 Thread(s)	I will venture a guess: 1 - you had your AC on 2 - The AC compressor was disenganged (cabin was cold & AC cycles on/off) 3 - when the ECU turns the AC compressor back on, it bumps up the throttle to keep the RPMs from dropping 4 - it happened at the only time you would really notice it (creeping into a parking space)

05-22-2014, 04:13 PM	#20
sofrsnsokleen GEARS!!??? Join Date: Aug 2012 Drives: raven black 2013 scion fr-s Location: the southeast side of san antonio, where the players play! Posts: 202 Thanks: 30 Thanked 64 Times in 36 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	It must've happened when it was downshifting to 1st, sounds like the most logical explanation.

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