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02-07-2021, 05:13 PM | #1 |
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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 |
02-07-2021, 06:03 PM | #2 |
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you have nt retuned and rescaled the maf against the new intake
this is what you get |
The Following User Says Thank You to tomm.brz For This Useful Post: | x808drifter (02-07-2021) |
02-07-2021, 07:52 PM | #3 |
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Sell/Return intake.
Put stock one back on. Get better filter for the stock system. Problem solved, money saved. |
02-07-2021, 08:04 PM | #4 |
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Ok.
So since I'm keeping it on, should I let the ECU adjust itself over time, reset it, or just open-flash tune it |
02-07-2021, 09:04 PM | #5 |
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Does OFT have a tune for that intake?
If yes, do that. If no. Custom tune. |
02-07-2021, 09:47 PM | #6 |
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That's not much fluctuation. I wouldn't worry about it.
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02-08-2021, 01:27 AM | #7 |
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Normal
Grimmspeed doesn’t need MAF scaling it’s designed to mimic OEM. It can be optimized with a tune but by no means necessary. Don’t worry about it. |
The Following User Says Thank You to 86TOYO2k17 For This Useful Post: | tomm.brz (02-08-2021) |
02-14-2021, 10:48 PM | #8 |
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Let the ECU learn. Were you running the AC or Heater? I notice the car will dip sometimes with heat and alot with A/C...
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2013 Series 10 FRS #553
RCE T2's, SPC LCAs -4/2.6 camber JDL 4-2-1 EL, FP and OP, Tuned by Zach@CSG on e85 RR Wilwood Front/Rear Sport BBK, Motul 600 Fluid ARC-8 17x9 SX2 GTs 245s/Koing 17x8 v730's 225's |
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