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#4809518 - 07/09/18 06:53 PM Cleaning the mass airflow sensor on Nissan VQ35
NormanBuntz Offline


Registered: 07/27/13
Posts: 2163
Loc: 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.
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#4809523 - 07/09/18 06:59 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
28oz Offline


Registered: 04/20/17
Posts: 383
Loc: 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.
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-----------------
1990 Nissan 300zx - Castrol Edge Euro 0W-40
2004 Nissan Quest - Pennzoil Platinum Euro 0W-40
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#4809535 - 07/09/18 07:09 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
JamesBond Offline


Registered: 12/13/06
Posts: 859
Loc: 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.

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#4809547 - 07/09/18 07:19 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
slacktide_bitog Online   content


Registered: 03/20/08
Posts: 6342
Loc: USA
You'd only have to reset if the CEL is on or there are codes stored. Otherwise, it shouldn't be necessary smile

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#4809549 - 07/09/18 07:21 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
Rand Offline


Registered: 08/20/03
Posts: 12721
Loc: 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.
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#4809560 - 07/09/18 07:32 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
mclasser Offline


Registered: 04/13/13
Posts: 2256
Loc: The Northeast
I cleaned the MAF on my old Infiniti several times and never had to reset anything afterward.


Edited by mclasser (07/09/18 07:33 PM)
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#4809585 - 07/09/18 07:53 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
TinyVoices Offline


Registered: 09/12/16
Posts: 493
Loc: Vienna, VA
Don't bother. I cleaned the maf on my g35 (same engine) multiple times and it ran better without an ecu reset.
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#4809604 - 07/09/18 08:14 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
thescreensavers Offline


Registered: 12/21/09
Posts: 429
Loc: Jupiter, FL
Clean it and plug it back in, resetting the ECU just puts it back into learning mode your wife would not notice.
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#4809693 - 07/09/18 09:40 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
The Critic Offline


Registered: 08/30/04
Posts: 19875
Loc: 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.
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#4809786 - 07/10/18 01:35 AM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
FermeLaPorte Offline


Registered: 07/25/17
Posts: 499
Loc: 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
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#4809819 - 07/10/18 03:56 AM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
Lubener Offline


Registered: 01/22/11
Posts: 2604
Loc: N.Ohio
If it's not broke, why potentially open a can of worms?
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#4809914 - 07/10/18 07:50 AM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: FermeLaPorte]
NormanBuntz Offline


Registered: 07/27/13
Posts: 2163
Loc: 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, 14K
2013 Honda Accord LX, 58K
2007 Honda Ridgeline RTS, 86K
2007 Infiniti M35, 105K

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#4809925 - 07/10/18 08:05 AM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: Lubener]
hallstevenson Offline


Registered: 04/25/17
Posts: 411
Loc: 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.

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#4809931 - 07/10/18 08:08 AM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: NormanBuntz]
hallstevenson Offline


Registered: 04/25/17
Posts: 411
Loc: 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.

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#4810234 - 07/10/18 12:35 PM Re: Cleaning the mass airflow sensor on Nissan VQ35 [Re: hallstevenson]
Lubener Offline


Registered: 01/22/11
Posts: 2604
Loc: 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..
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