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Cleaning the mass airflow sensor on Nissan VQ35 #4809518
07/09/18 06:53 PM
07/09/18 06:53 PM
Joined: Jul 2013
Posts: 2,207
Outer Banks, NC
NormanBuntz Offline OP
NormanBuntz  Offline OP
Joined: Jul 2013
Posts: 2,207
Outer Banks, NC
Bought some CRC Mass Airflow Cleaner to douche out the sensor on the wife's car. 106K miles and it's never been cleaned.

Question: after cleaning must I perform an ECU reset? I know the procedure, but is it necessary?. I've seen conflicting information.


2017 Honda Odyssey SE, 15K
2013 Honda Accord LX, 58K
2007 Honda Ridgeline RTS, 87K
2007 Infiniti M35, 106K
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809523
07/09/18 06:59 PM
07/09/18 06:59 PM
Joined: Apr 2017
Posts: 420
Utah, USA
28oz Offline
28oz  Offline
Joined: Apr 2017
Posts: 420
Utah, USA
I don't know about necessary, but it wouldn't hurt and is easy to do. There is also an idle relearn procedure out there that you could do...........again, I don't know how necessary, but wouldn't hurt.


-----------------
1990 Nissan 300zx - Castrol Edge Euro 0W-40
2004 Nissan Quest - Pennzoil Platinum Euro 0W-40
2003 Ford Excursion 7.3 PSD - Mobil 1 TDT 5w-40
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809535
07/09/18 07:09 PM
07/09/18 07:09 PM
Joined: Dec 2006
Posts: 911
midwest
JamesBond Offline
JamesBond  Offline
Joined: Dec 2006
Posts: 911
midwest
I've not cleaned the maf on a Nissan but on other makes I don't do any sort of procedure and it always seems fine.

Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809547
07/09/18 07:19 PM
07/09/18 07:19 PM
Joined: Mar 2008
Posts: 6,792
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,792
USA
You'd only have to reset if the CEL is on or there are codes stored. Otherwise, it shouldn't be necessary smile

Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809549
07/09/18 07:21 PM
07/09/18 07:21 PM
Joined: Aug 2003
Posts: 12,892
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,892
NE,Ohio
I'd probably just disconnect the battery and do the idle relearn.. any added bonus such as the trans shifting better is just that.. a bonus.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809560
07/09/18 07:32 PM
07/09/18 07:32 PM
Joined: Apr 2013
Posts: 2,326
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,326
The Northeast
I cleaned the MAF on my old Infiniti several times and never had to reset anything afterward.

Last edited by mclasser; 07/09/18 07:33 PM.

2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809585
07/09/18 07:53 PM
07/09/18 07:53 PM
Joined: Sep 2016
Posts: 513
Vienna, VA
TinyVoices Offline
TinyVoices  Offline
Joined: Sep 2016
Posts: 513
Vienna, VA
Don't bother. I cleaned the maf on my g35 (same engine) multiple times and it ran better without an ecu reset.


1993 Toyota MR2 Hardtop N/A - 160k miles - Valvoline Max Life 5w30
2006 Toyota Matrix XR AWD (Fiancee) - 130k miles - Valvoline Max Life 5w30
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809604
07/09/18 08:14 PM
07/09/18 08:14 PM
Joined: Dec 2009
Posts: 459
Jupiter, FL
thescreensavers Offline
thescreensavers  Offline
Joined: Dec 2009
Posts: 459
Jupiter, FL
Clean it and plug it back in, resetting the ECU just puts it back into learning mode your wife would not notice.


2017 Camaro SS 1LE (Motul 8100 X-clean 5W40)
1997 Jeep XJ 4x4 (15W40 HDEO Maxlife)
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809693
07/09/18 09:40 PM
07/09/18 09:40 PM
Joined: Aug 2004
Posts: 19,988
CA
The Critic Online crying
The Critic  Online Crying
Joined: Aug 2004
Posts: 19,988
CA
MAF cleaning will not require any relearns.

On the other hand, cleaning the throttle body tends to open up a can of worms. The relearn procedure has a low success rate, especially on the older VQ35s. We've had to reflash ECU's, disconnect injectors, stuff rags in the intake, etc in order to get the relearn to complete. Sometimes, replacing both the throttle body and the ECM is needed. If you decide to clean the throttle body, only do so if you understand the potential consequences.


2011 Toyota Prius - 173k - Various 0W-20 (Brew)
2007 Honda Accord 2.4 - 131K - Mobil 1 EP HM 5W-30
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809786
07/10/18 01:35 AM
07/10/18 01:35 AM
Joined: Jul 2017
Posts: 542
Texas (south)
FermeLaPorte Offline
FermeLaPorte  Offline
Joined: Jul 2017
Posts: 542
Texas (south)
I've cleaned the MAF on my nissan. As long as you disconnect it from the battery and wait till it dries up, you are fine


Always Mobil 1
2014 1.6L Nissan Versa Sedan, 5 spd, 5k OCI.
2011 3.5L Chevrolet Impala, Automatic, 5k OCI.
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809819
07/10/18 03:56 AM
07/10/18 03:56 AM
Joined: Jan 2011
Posts: 2,711
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,711
N.Ohio
If it's not broke, why potentially open a can of worms?


The "thinking" man's friend.
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: FermeLaPorte] #4809914
07/10/18 07:50 AM
07/10/18 07:50 AM
Joined: Jul 2013
Posts: 2,207
Outer Banks, NC
NormanBuntz Offline OP
NormanBuntz  Offline OP
Joined: Jul 2013
Posts: 2,207
Outer Banks, NC
Originally Posted By: FermeLaPorte
I've cleaned the MAF on my nissan. As long as you disconnect it from the battery and wait till it dries up, you are fine


By disconnect, is unplugging the wire connector on the sensor sufficient, or do I have to disconnect the negative battery cable?

And, Critic, thanks for that helpful advice.


2017 Honda Odyssey SE, 15K
2013 Honda Accord LX, 58K
2007 Honda Ridgeline RTS, 87K
2007 Infiniti M35, 106K
Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: Lubener] #4809925
07/10/18 08:05 AM
07/10/18 08:05 AM
Joined: Apr 2017
Posts: 622
Ohio
hallstevenson Online content
hallstevenson  Online Content
Joined: Apr 2017
Posts: 622
Ohio
Originally Posted By: Lubener
If it's not broke, why potentially open a can of worms?


Do you replace filters ? If so, why ? Presumably because they get dirty. The MAF gets dirty as well.

Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz] #4809931
07/10/18 08:08 AM
07/10/18 08:08 AM
Joined: Apr 2017
Posts: 622
Ohio
hallstevenson Online content
hallstevenson  Online Content
Joined: Apr 2017
Posts: 622
Ohio
Originally Posted By: NormanBuntz
By disconnect, is unplugging the wire connector on the sensor sufficient, or do I have to disconnect the negative battery cable?


Yes, that's sufficient. You want to remove them anyway just to make cleaning them easier. I put them on a work surface with a towel under them, sprayed them extensively (from a distance of about 12-15"), and let them dry for 15+ minutes. I was doing other things so I just let them sit.

I have the VQ35HR engine and as others have indicated, no relearning was necessary.

Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: hallstevenson] #4810234
07/10/18 12:35 PM
07/10/18 12:35 PM
Joined: Jan 2011
Posts: 2,711
N.Ohio
Lubener Offline
Lubener  Offline
Joined: Jan 2011
Posts: 2,711
N.Ohio
Originally Posted By: hallstevenson
Originally Posted By: Lubener
If it's not broke, why potentially open a can of worms?


Do you replace filters ? If so, why ? Presumably because they get dirty. The MAF gets dirty as well.

Funny, I don't remember seeing anything ever listed in any manual stating MAF cleaning as a maintenance item..


The "thinking" man's friend.
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