Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB - View Single Post - Is this normal? New CAI, rpm fluctuation when braking to a halt.

sccm · 02-07-2021, 06:13 PM

Hi,

I installed a Grimmspeed CAI on my A/T 86 the other day. Maybe this is paranoia but after paying attention more I noticed that when braking at stoplights, as my RPM decreases to a certain amount <900, it fluctuates up a little bit, maybe from 750-850 as my speed decreases and I come to an idle. No clue if this happened before the install.

I have no other issues, the car runs smoothly and my throttle response feels somewhat better. No lights on the dash, no sounds or anything abnormal I could think of. Pressing on the brakes at rest does nothing to increase RPMs.

Is this just normal for the A/T for this car or after installing a new intake in general? For the record, I still am learning a ton and just getting into working on cars, so this probably sounds stupid. The one thread I searched didn't really give me an answer. Thanks

02-07-2021, 06:13 PM	#1
sccm Junior Member Join Date: Jan 2021 Drives: 2020 Toyota 86 Location: VA Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Is this normal? New CAI, rpm fluctuation when braking to a halt. Hi, I installed a Grimmspeed CAI on my A/T 86 the other day. Maybe this is paranoia but after paying attention more I noticed that when braking at stoplights, as my RPM decreases to a certain amount <900, it fluctuates up a little bit, maybe from 750-850 as my speed decreases and I come to an idle. No clue if this happened before the install. I have no other issues, the car runs smoothly and my throttle response feels somewhat better. No lights on the dash, no sounds or anything abnormal I could think of. Pressing on the brakes at rest does nothing to increase RPMs. Is this just normal for the A/T for this car or after installing a new intake in general? For the record, I still am learning a ton and just getting into working on cars, so this probably sounds stupid. The one thread I searched didn't really give me an answer. Thanks