Question about 1999 Subaru Impreza

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My subaru wont start with mass air flow sensor connected, when disconnected it starts up, but at 3500 rpm's bogs out.

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  • apinkoski24 Sep 25, 2009

    we went and got one out of a suby at pick a part and it still seems to be doin this? could it be something else we are missing??

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  • Master
  • 490 Answers

Sounds like you need a new mass air flow

Posted on Sep 25, 2009

Testimonial: "Thanks for your input. We did however go and get one out of a suby at Pick A Part...she is still doin it???"

  • Jeff Adkisson
    Jeff Adkisson Sep 25, 2009

    anything is possible
    but I personally would never buy used junk yard electrical parts
    did you get a check engine light?? when the problem started??


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It stutters or cuts off at 3500 rpm ? If so is the mass air flow sensor

Aug 27, 2014 | Cars & Trucks

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Mass air flow sensor issue?


may be it was not the MAF sensor but bad connections in the wires. Have a technician check the voltage in the wires and connectors to determine if that was the fault to start with

Jul 28, 2013 | 1990 Ford Aerostar

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I have a 2000 excursion and sometimes wen I accelerate it starts chocking out at 2000 rpm and won't go any higher


Mostly your MAF MASS AIR FLOW SENSOR needs cleaning.
1st Disconnect the battery ground cable
then open the engine air cleaner.
  • Disconnect the MAF sensor electrical connector.
  • Release the air cleaner clamp.
  • Separate the inlet side from the outlet side of the air cleaner.
  • Remove the MAF assembly.
  • Disconnect the MAF sensor electrical connector.
  • Remove the nuts and separate the MAF sensor from the MAF sensor plate.
As shown

5_2_2012_12_14_19_pm.jpg
then follow the steps in the video.
HOW TO CLEAN A MASS AIR FLOW SENSOR

if that did not clear your engine chocking then make sure there is no Vacume leak.
hope that helps

May 01, 2012 | 2000 Ford Excursion

1 Answer

My saab 93 showed error code P0100. I renewed the mass flow sensor but the error code and the poor performance is still there. the revs are limited to approx 3500.


P0100 OBD-II Trouble Code

Technical Description

Mass Air Flow (MAF) Circuit Malfunction

Basically this means that there's a problem with the Mass Air Flow (MAF) sensor or circuit.

You will likely not notice any serious driving problems, but there may be symptoms like a general decrease in power or sluggishness.
Causes

A code P0100 may mean one or more of the following:

* The MAF may be disconnected, or a wiring connection may be bad.
* The MAF sensor may be faulty.

Possible Solutions

Use an OBD II Reader (or go tou your local parts store and they will for free) and reset the code and see if it comes back.
Then start with the cheapest, easiest repair procedures:

* Check the Mass Air Flow Sensor wiring/harness is connected properly and that there are no broken / frayed wires.
* Unplug and reconnect the MAF wiring harness a few times to clear the contacts.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information).
* Replace the MAF sensor.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.
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Sep 23, 2010 | 2001 Saab 9-3

1 Answer

Start car is fine but once hits idle speed the engine hesitates and then dies. I disconnected the mass air flow sensor and car ran better, then hooked it back up and the engine died instantly. Is this a...


i would agree with your diagnosis. i had a similar problem with a crown victoria. disconnecting the maf sensor made it run better. i replaed the sensor and have had no problem since

May 08, 2010 | 1999 Subaru Forester

1 Answer

Eng starts to sputter when the engine gets around 2k rpm mass air flow disconnected


You shouldn't run with the mass airflow sensor disconnected. That's probably the problem. Is it bad or shy is the mass airflow sensor disconnected?

Dec 13, 2009 | 1998 Chevrolet Tahoe

1 Answer

2003 Sprinter 3500 2.7. Mass air code still after


P0100 OBD-II Trouble Code

Technical Description

Mass Air Flow (MAF) Circuit Malfunction

Basically this means that there's a problem with the Mass Air Flow (MAF) sensor or circuit.

You will likely not notice any serious driving problems, but there may be symptoms like a general decrease in power or sluggishness.
Causes

A code P0100 may mean one or more of the following:

* The MAF may be disconnected, or a wiring connection may be bad.
* The MAF sensor may be faulty.

Possible Solutions

Use an OBD II Reader (or go tou your local parts store and they will for free) and reset the code and see if it comes back.
Then start with the cheapest, easiest repair procedures:

* Check the Mass Air Flow Sensor wiring/harness is connected properly and that there are no broken / frayed wires.
* Unplug and reconnect the MAF wiring harness a few times to clear the contacts.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information).
* Replace the MAF sensor.

Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.
!!!!

Oct 02, 2009 | 2003 Dodge Sprinter

1 Answer

Uneven acceleration just at the begining when starting forward.


If I am to understand correctly you are referring to the MAF, Mass Air Flow sensor. If so, it is a very simple job without the use of special tools. Disconnect wire connection from sensor. Remove air cleaner assembly From the air intake duct. Remove nut ( 10mm If i remember correctly) and lift from air cleaner. Then just reverse to reassemble. Hope this helps.

Nov 22, 2008 | 1997 Subaru Outback

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