MASS AIR FLOW SENSOR?

Tiny
AMARIE1121
  • MEMBER
  • 1997 FORD TAURUS
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
How do I remove the MASS AIR FLOW SENSOR? There is a star shaped screw on bottom right and a small black knob looking thing in the upper left. Removed the screw, how do I remove the other?
Saturday, October 2nd, 2010 AT 8:09 PM

12 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hi AMARIE1121,Welcome to 2carpros and TY for the donation.

Service and Repair

Mass Air Flow (MAF) Sensor


https://www.2carpros.com/forum/automotive_pictures/12900_m_3.jpg



REMOVAL:

CAUTION: The Mass Air Flow (MAF) sensor is a calibrated unit. Service hot wire engine element and housing as a complete assembly.

1.Disconnect battery ground cable.

NOTE: When the battery has been disconnected and reconnected, some abnormal drive symptoms may occur while the Powertrain Control Module (PCM) relearns its adaptive strategy. The vehicle may need to be driven 10 miles or more to relearn the strategy.

2.Remove air cleaner outlet tube.
3.Disconnect engine control sensor wiring connector from MAF sensor.
4.Remove four retaining nuts from air cleaner cover.
5.Carefully remove MAF sensor. Discard gasket.

INSTALLATION:
1.Position MAF sensor with new gasket onto air cleaner cover.
2.Install four retaining nuts. Tighten to 8-12 Nm (71-106 lb in) .
3.Install air cleaner outlet tube.
4.Connect engine control sensor wiring connector to MAF sensor.
5.Connect battery ground cable.
6.Start engine and check for vacuum leaks.

https://www.2carpros.com/kpages/auto_repair_manuals_alldata.htm
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Thursday, October 22nd, 2020 AT 10:08 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Mass Air Flow (MAF) Sensor
CAUTION: The mass air flow sensor (MAF sensor) (12B579) is a calibrated unit. Service hot wire engine element and housing as a complete assembly.

Removal

Disconnect battery ground cable
Remove air cleaner outlet tube

Disconnect engine control sensor wiring connector from mass air flow sensor.

Remove four retaining nuts from air cleaner cover.

Carefully remove mass air flow sensor. Discard gasket.

Installation

Position mass air flow sensor with new gasket onto air cleaner cover.

Install four retaining nuts. Tighten to 8-12 Nm (71-106 lb-in).

Install air cleaner outlet tube.
Connect engine control sensor wiring connector to mass air flow sensor.

Connect battery ground cable.

Start engine and check for vacuum leaks.


https://www.2carpros.com/forum/automotive_pictures/99387_Capture_22.jpg

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Thursday, October 22nd, 2020 AT 10:08 AM
Tiny
AMARIE1121
  • MEMBER
  • 2 POSTS
So, this is one whole unit? You can't remove the sensor from the meter?
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Thursday, October 22nd, 2020 AT 10:08 AM
Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
It can be done, but its not recommended
notice caution above

Sorry rasmataz
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Thursday, October 22nd, 2020 AT 10:08 AM
Tiny
MUSTANGQWERTY
  • MEMBER
  • 1 POST
  • 1997 FORD TAURUS
Engine Performance problem
1997 Ford Taurus 4 cyl Front Wheel Drive Automatic

I am having trouble locating the MAF sensor on my '97 Taurus-I would appreciate any help you can provide.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,749 POSTS
Its located right in the air filter housing on the air intake
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You sure its 4cylinder-For a 97 Ford Taurus they all showing for a V6 engine which has a MAF sensor-
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
TABICAKES79
  • MEMBER
  • 3 POSTS
  • 1995 FORD TAURUS
  • 3.0L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 85,000 MILES
After I drive for about 5 minutes or so, the car smells a lot like the catalytic converter. The check engine light comes on, the car loses power on acceleration, and sometimes sputters and backfires. There is black smoke coming out of the tailpipe. The diagnostics wouldn't return engine codes, only that the mass air flow was malfunctioning. I am at a loss, its not the pcv valve either.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
Sputtering is a sign of a misfire. The unburned fuel will burn in the catalytic converter and overheat it. The black smoke from the tail pipe is proof of too much fuel going into the exhaust system. If the catalytic converter isn't damaged already, it will be if you continue trying to drive like this. Once the catalyst melts, it will block the exhaust system. That can lead to what sounds like a backfire, but if the engine is otherwise running properly, the clue to a plugged catalytic converter is a smooth and steady hiss from the tail pipe instead of the normal "putt putt".

If there's no diagnostic fault code, how did you determine the mass air flow sensor is "malfunctioning"? What exactly do you mean by that? That sensor is the main one for determining fuel metering calculations, so if it's reporting a wrong value, you're going to get the wrong amount of fuel.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
TABICAKES79
  • MEMBER
  • 3 POSTS
I am only repeating what the man who ran the diagnostics said. Someone else said I need an obd1 reader for a Ford. The muffler shop said there would not be black smoke coming out if it is the catalytic converter. I think I am being BS'd because the car is so old and nobody wants to do the work. Unless they are just as much at a loss as I am. I still think it is the catalytic converter. It smells like eggs very strong when it warms up and starts acting up. It also has a strong fuel smell when this happens. We just had a tune up, also.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
TABICAKES79
  • MEMBER
  • 3 POSTS
The man that ran diagnostics said that the MAF sensor needs to be replaced or cleaned. Idk.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)
Tiny
CARADIODOC
  • MECHANIC
  • 33,723 POSTS
The gas smell and sputtering proves there's a spark-related misfire and too much unburned gas is going into the exhaust system where it will burn in the catalytic converter and overheat it. The egg smell proves the catalyst material is being destroyed by continuing to drive the car.

Most likely the catalytic converter will need to be replaced, but you have to diagnose and fix the problem that caused it to fail. Catalytic converters don't fail without a cause.
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Thursday, October 22nd, 2020 AT 10:11 AM (Merged)

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