MAF Sensor cleaning - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

MJones_RB · 04-17-2023, 01:44 PM

My FR-S is nearing 60k and the idle is a little rough at times. Decided it's time to clean the MAF sensor and reset the ECU. Picked up this stuff (there's really only a couple different brands that offer MAF cleaner). Has anyone else done this with any positive results? Thanks

tomm.brz · 04-17-2023, 02:58 PM

do it)

Grady · 04-17-2023, 06:56 PM

If you use 4 cans you could get another 40 horse power!

Bonburner · 04-17-2023, 08:44 PM

I'd never done it in 11 years, so I figured I'd try it.

Made no difference.

Saw some people also get a throttle body cleaner ... I intend on doing. ... When I'm not feeling like a lazy mut.

Ultramaroon · 04-17-2023, 09:34 PM

It can only help if the MAF sensor really was dirty. The only reason I can think would be from oil coming off of one of those reusable elements.

Kaotic Lazagna · 04-17-2023, 10:12 PM

Have you changed your spark plugs? iirc, they're due to a change at 60k. Unless you are using an overly oiled air filter, my guess is your idle hiccups are from the plugs.

Ultramaroon · 04-17-2023, 10:22 PM

Quote:

Originally Posted by Kaotic Lazagna

Have you changed your spark plugs? iirc, they're due to a change at 60k. Unless you are using an overly oiled air filter, my guess is your idle hiccups are from the plugs.

My gut says MAF before plugs. I'd check LTFT at idle before cleaning MAF and also would watch STFT immediately afterward. @tomm.brz, amirite?

EndlessAzure · 04-17-2023, 10:56 PM

I use CRC MAF Cleaner. I don't have any specific issues, and haven't run into any issues (with the car or the product). Just part of regular maintenance every other oil change since I have an oiled filter

130k miles on ODO. Spark plugs every 60k miles, got "new" old coil packs at 120k

tomm.brz · 04-18-2023, 01:47 AM

Quote:

Originally Posted by Ultramaroon

My gut says MAF before plugs. I'd check LTFT at idle before cleaning MAF and also would watch STFT immediately afterward. @tomm.brz, amirite?

no real need to look at stft unless it is like pegged hard to either too negative or too positive values.. in that case it will shortly transfer it to ltft anyway
Cleaning a maf is never a bad idea, specialy if you have the specific cleaner that is safe to use on it

Muskoka800 · 04-18-2023, 08:38 AM

Quote:

Originally Posted by MJones_RB

My FR-S is nearing 60k and the idle is a little rough at times. Decided it's time to clean the MAF sensor and reset the ECU. Picked up this stuff (there's really only a couple different brands that offer MAF cleaner). Has anyone else done this with any positive results? Thanks

Just spray the element. Do not touch it.
I’ve always run oiled K&N drop-in filters since 1988 and periodic (annual) sensor cleansing has been part of my maintenance routine.

wbradley · 04-18-2023, 10:29 AM

I need to clean the MAF sensor at least once per season with using an HKS mushroom intake. At some point it has sucked in some oil and it took me a while to discover that a dirty MAF was THE reason my car wasn't running as it should. It is best to remove the intake section with the sensor and spray it really good outdoors in a well ventilated area.

Bonburner · 04-18-2023, 01:13 PM

Quote:

Originally Posted by EndlessAzure

I use CRC MAF Cleaner. I don't have any specific issues, and haven't run into any issues (with the car or the product). Just part of regular maintenance every other oil change since I have an oiled filter

130k miles on ODO. Spark plugs every 60k miles, got "new" old coil packs at 120k

Coil packs are a big one, the front passenger one tends to go out because its so close to the header.

I also found my car to be smoother with a newer battery .. but that was when the batteries were on their last leg (+5 years of use)

MJones_RB · 04-18-2023, 01:42 PM

Quote:

Originally Posted by Kaotic Lazagna

Have you changed your spark plugs? iirc, they're due to a change at 60k. Unless you are using an overly oiled air filter, my guess is your idle hiccups are from the plugs.

I haven't yet. I know they are due at 60k but some say they should be good for 120k. Thanks!

Teseo · 04-19-2023, 08:02 PM

Quote:

Originally Posted by Ultramaroon

It can only help if the MAF sensor really was dirty. The only reason I can think would be from oil coming off of one of those reusable elements.

Its called High flow performance air filter. Worth the extra 3HP. I would rather replace pcv than touch any electrical stuff

04-17-2023, 09:34 PM	#5
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,871 Thanks: 52,137 Thanked 36,521 Times in 18,922 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	It can only help if the MAF sensor really was dirty. The only reason I can think would be from oil coming off of one of those reusable elements. __________________ service manuals

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2) Help	Johnders2586	Issues \| Warranty \| Recalls / TSB	9	04-04-2023 03:32 PM
Greddy informeter, boost sensor, boost sensor harness, info touch sensor apaptor	Supra2k	Audio/Visual, Electronics, Infotainment, NAV	1	02-26-2014 08:11 PM
Stock FA20 Crankshaft Angle Sensor - Anyone know what type of sensor and output?	Acree	Engine, Exhaust, Transmission	2	08-26-2013 06:39 PM

04-17-2023, 02:58 PM	#2
tomm.brz Senior Member Join Date: Jan 2017 Drives: brz 2017 hksv2 Location: italy Posts: 2,196 Thanks: 500 Thanked 1,067 Times in 775 Posts Mentioned: 65 Post(s) Tagged: 0 Thread(s)	do it)

04-17-2023, 10:12 PM	#6
Kaotic Lazagna Senior Member Join Date: Apr 2014 Drives: GR Corolla Location: Lathrop, CA Posts: 4,926 Thanks: 3,087 Thanked 3,017 Times in 1,859 Posts Mentioned: 40 Post(s) Tagged: 2 Thread(s)	Have you changed your spark plugs? iirc, they're due to a change at 60k. Unless you are using an overly oiled air filter, my guess is your idle hiccups are from the plugs.

User Name		Remember Me?
Password