Question about 1990 Ford Aerostar

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Mass air flow sensor issue?

When I plug in the mass air flow sensor the engine bogs down. When I unplug it the engine idles fine. I have gotten another sensor and I am still having the same issue.

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  • Ford Master
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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

Posted on Jul 28, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Repalced O2 sensors, mass air flow sensor, and plugs error messag

dpfe velve

small emissions valve with one electrical connnector and three to four vacume lines located near your egr valve. this is a comon fault on fords emmissions system.

Posted on Aug 15, 2009

autodr
  • 260 Answers

SOURCE: Cleaning the Mass Air Flow Sensor

i will try to help. 171/174 indicates lean condition in engine. the mass air flow sensor is located in the rubber tube going to throttlebody. you can try to clean it. using mild carb cleaner safe for sensors, remove sensor from tube. spray clean the tiny wires located in the cylinder. do not touch them, they are very delicate. these engines are also notorious for leaking intake gaskets and faulty pcv valves. these will all set these 2 codes. feel free with anymore questions.

Posted on Nov 15, 2008

Molson02536
  • 3854 Answers

SOURCE: 2001 ford explorer sport,6 cylinder,rough idle and

If there is a Auto Zone around your area, have them scan the Explorer for any DTC codes since it's fee of charge. But in the mean time buy a can of MAF cleaner and follow the instructions and also buy a can of Trottle body cleaner and follow the instructions on the can. Clean the MAF and the Throttle body, also try to get the Idle Air Control falve cleaned too which is on the throttle body. So use up the whole can of Throttle body cleaner and it would not hurt to use two cans. Once everything is cleaned that should fix the problem, the other thing to that would cause your poor idle and stalling is a bad or dirty EGR valve which can be cleaned with Carburetor cleaner since it's stronger then the Throttle body cleaner, just remove the EGR and spray the Carbon build away and place back in place. Note: the Carb cleaner is to strong for the gaskets used on the throttle body so don't use it on the throttle body. Good luck and this should help get your Explorer running 100% soon.

Posted on Jul 09, 2009

blueextc3221
  • 15935 Answers

SOURCE: location of mass air flow sensor

The sensor is mounted on the throttle body between the air cleaner assembly and the air cleaner outlet tube.

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Posted on Sep 04, 2009

  • 1 Answer

SOURCE: 98 ford ranger 4.0L runs very rough when mass air

When Driving my 98 ranger in the hills it miss fires, what would cause this

Posted on Nov 27, 2009

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My 1992 nissan sentra backfires and has a loss of power.


A possible problem with the mass air flow sensor. Make sure they hooked up the air filter duct work to the throttle and the air filter box itself is closed tight. There is a fine wire inside the sensor, and this may have gotten disturbed when the master and slave were installed. Check the wiring right to it and make sure it's plugged in tight. This is the sensor that is on the air filter box in the duct work to the throttle. This can cause plenty of running issues and never turn the check engine light on. If you do need to replace your mass air flow sensor this site looks like it has cheap prices, free shipping and great reviews http://www.buyautoparts.com/mass-air-flow-meter.html

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CAR BOGS DOWN COULD BE FAULTY TPS SENSOR, CLOGGED FUEL INJECTORS AND CLOGGED FUEL FILTER, STOPPED UP AIR FILTER, FAULTY MASS AIR FLOW SENSOR.BEST BET IS TO HAVE CAR CODE SCAN MANY THINGS WILL CAUSE ENGINE BOG DOWN.HAVE VECHICLE CODE SCAN AND SEE IF YOU HAVE ANY FAULT CODES.MAKE CHECK TRANSMISSION FLUID LEVEL.ENGINE NEED TRANSMISSION TO FOR TORQUE AND POWER TO PUT CAR IN MOTION IF TRANSMISSION NOT WORKING OKAY IT WILL PULL DOWN ENGINE POWER.

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If it idles up and down real high, its the throttle body sensor. If it's a low up and down idle and runs rough it is mass air flow meter. If you unplug the mass airflow meter and it will just low idle (no up & down) then the mass air flow meter is bad.

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this vehicle most likely has a mass air flow sensor it may have got accidently unplugged or the air tube from mass airflow to engine is not connected well or it could be that you have indeed a bad mass air flow sensor they do make a special cleaner that you may want to try before purchasing a mass air flow sensor or purchasing one from salvage yard the symptoms you describe would be created by a bad massair flowsensor

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2002 chec blazer V6 4.3 Engine idles good. On accleration engine bogs down. Scan tool says Code 101- MAF/Vat. Will this cause that and where is the location of the MAF


Along the duct from the air filter is Mass Air Flow sensor. the plug has a 3 wire plug going to it. The best test to determine if it is the problem is to unplug it and drive it. If it runs fine, the sensor is bad. Keep in mind if this works and it runs better, don't just leave it unplugged. It costs a good chunk of money, but leaving it unplugged will cost you MPG.

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check air flow meter . when car is at idel disconect wires and if tone changes with engine then its fine but if no change then it needs replaced hope this helps?

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Car will not start when Mass Air Flow sensor is plugged in; when it is unplugged the car will idle and gradually idle up if you give it very little fuel at a time. Installed a used Mass Air Flow sensor...


hi there, when air flow unplugged, ecu goes into limp home mode ,a back up if something dies whilst driving. it sounds as if your used mass air flow sensor is faulty , they are more fragile than they look, one knock and these early fine wire models are gone. i replaced many when i worked at a volvo dealership a few years ago. hope this helps, and good luck.

Aug 11, 2008 | 1989 Volvo 240

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