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Possible MAF Sensor issue

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VRXblack
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Possible MAF Sensor issue

Postby VRXblack » Wed Jul 01, 2020 12:04 pm

Hi All
Wondering if any one has an idea on what might be happening to my car.
My issues happen when i drive for a bit and come up to a set of traffic lights, the revs drop down to around 500-530rpm and feels like the car is struggling but after a second or two it jumps back up to 600rpm and feels smooth. I plugged in my OBD2 tool and saw this happening on my phone in real time. Everything i have done to research points to the sensor possibly being the issue.

This started a few months back just after summer. First though it might have been the sudden change in weather or my car was just due for a service, which was actually done about a month ago anyways. Ended up taking my car in to Mitsi dealer to do its 90k service and mentioned it to them there and they advised that they "Cleaned air flow sensor, rechecked revs and all was ok". I did noticed after the service it was a lot better but now its popped up again.

Could my MAF sensor be the problem again? Would it be worth wild spraying it with some cleaner? Or should i be looking at something else?

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bumblebee
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Re: Possible MAF Sensor issue

Postby bumblebee » Wed Jul 01, 2020 4:27 pm

This can happen with a throttle body and it can also be in the ecu rom

Have you changed the throttle body at all?

Have you done any kind of ecu flash?

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Re: Possible MAF Sensor issue

Postby VRXblack » Wed Jul 01, 2020 4:45 pm

Nah never done anything like that at all.
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Re: Possible MAF Sensor issue

Postby bumblebee » Wed Jul 01, 2020 6:51 pm

Fuel injector or pump

Replace or upgrade any of those?

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Re: Possible MAF Sensor issue

Postby lancerdarryl » Thu Jul 02, 2020 6:47 am

Give the Maf and throttle body a clean and see how you go
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Re: Possible MAF Sensor issue

Postby VRXblack » Thu Jul 02, 2020 8:27 am

bumblebee wrote:Fuel injector or pump

Replace or upgrade any of those?

haven't replaced/upgraded those either =/
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Re: Possible MAF Sensor issue

Postby VRXblack » Thu Jul 02, 2020 8:28 am

lancerdarryl wrote:Give the Maf and throttle body a clean and see how you go

hmmm yeah might do.
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Re: Possible MAF Sensor issue

Postby bumblebee » Thu Jul 02, 2020 9:30 am

Out of interest how many kilometres do.you have on the clock

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Re: Possible MAF Sensor issue

Postby Draebor » Thu Jul 02, 2020 1:02 pm

My cj vrx did a similar thing, was hunting idle at the lights - gave the MAF sensor a clean with the proper MAF sensor cleaning spray and also cleaned the throttle body and it sorted it out in no time.

this did happen after installing a K&N filter to replace the shitty paper on i had in there, i would wager some oil from the new filter ended up on the sensor causing the problem in my case.
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VRXblack
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Re: Possible MAF Sensor issue

Postby VRXblack » Thu Jul 02, 2020 4:06 pm

bumblebee wrote:Out of interest how many kilometres do.you have on the clock

Just about to reach 88,000. As mentioned i took it in about a month ago to do my 90k servicing. Not sure if that is part of the service im assuming it aint cause i had to tell them about the issue and they just cleaned out the sensor.
Last edited by VRXblack on Thu Jul 02, 2020 4:18 pm, edited 1 time in total.
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Re: Possible MAF Sensor issue

Postby VRXblack » Thu Jul 02, 2020 4:17 pm

Draebor wrote:My cj vrx did a similar thing, was hunting idle at the lights - gave the MAF sensor a clean with the proper MAF sensor cleaning spray and also cleaned the throttle body and it sorted it out in no time.

this did happen after installing a K&N filter to replace the shitty paper on i had in there, i would wager some oil from the new filter ended up on the sensor causing the problem in my case.

Yeah everything that i have read all leads to that, but thought i would ask the question before going off and assuming on my own.
Is there a specific spray for the throttle body or is a MAF spray sufficient enough?

Hmmm interesting. i did put a K&N HiFlow air filter and RA snorkel but that was almost 2 years now. Maybe your right, maybe its just taken this amount of time to cause an issue.
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Re: Possible MAF Sensor issue

Postby lancerdarryl » Thu Jul 02, 2020 5:45 pm

Oil impregnated filters give us no end of trouble with dirty airflow meters.The OEM filter is the same one used in Ralliarts and Evos so airflow for an NA engine should not be a problem
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Re: Possible MAF Sensor issue

Postby bumblebee » Thu Jul 02, 2020 6:09 pm

Yes there is a specific throttle body spray to use
It's called throttle body cleaner
My preference is Nulon

Don't forget K&N isn't the only manufacturer of reusable filter, Aeroflow make them also

Also when recoil the filter, there is no need to drown the filter in oil either

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Re: Possible MAF Sensor issue

Postby VRXblack » Fri Jul 03, 2020 8:41 am

Awesome, thanks for all your help everyone. Much appreciated!
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bumblebee
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Re: Possible MAF Sensor issue

Postby bumblebee » Fri Jul 03, 2020 4:07 pm

Keep us posted with how you go


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