Question about 1986-1997 Nissan Pickup Side View Mirror

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Troubleshoot mass air flow sensor

The engine starts irradically and idles fast and cannot adjust it, sprayed carb cleaner in it and idles faster.

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Why do you think the MAF is the problem? More likely the throttle body is dirty and the throttle blade is not closing all the way, with the result that the Idle air control cannot do its job.

Posted on May 23, 2015

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Posted on Jan 02, 2017

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I hav a 98 Malibu Was idleing funny change the tps didnt fix it now when driveing it acts like it wants to die but when i stop it dies still acts like the idleing is still offf


There are a few things you can check for, 1. the idle air control valve for carbon and the same for the throttle plate having varnish or carbon build-up . Use spray carb. cleaner if any of these are black with carbon.2. A dirty mass air flow sensor will cause stalling and Idle problems . You can get cleaner just for mass air flow sensors ,don't use carb.clean ,or brake clean ! Or you could possibly have a vacuum leak ! check all vacuum hose , you can spray carb cleaner at intake gaskets to check for leaks , but be careful it is flammable !!!
Vacuum Leak Checking With Choke Cleaner COLD ENGINE look at this video

Dec 09, 2014 | Cars & Trucks

1 Answer

Po101 code


Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with low compress air or mass air flow sensor cleaner. Reset code and drive vehicle. Check for air leaks on or around any intake pipework using a good spraying of carb cleaner, if the engine surges then that's the leak. Check wiring to Maf and if the inside is dirty, again use carb cleaner liberally...NOTE: do not use Wd40... If the code comes back, it may be necessary to replaced the mass air flow sensor.

Jun 04, 2014 | 2000 BMW 3 Series

1 Answer

My toyota l touring has unstable engine idle speed


clean the throttle body and idle air control valve with reg carb cleaner ,do not spray the mass air flow sensor. Clean with a rag soaked in the cleaner, have someone hold the throttle down from inside car spray until clean. put back all disconnected hoses and hold throttle to floor when starting. Then quickly release and give 2 half revs and release. allow engine to idle. It should now idle smoothly. If not check for cacume hose leaks an replace any that feel spongy or soft or have splits in them.

Apr 18, 2013 | Toyota Corolla Cars & Trucks

1 Answer

My 2006 jeep grand cherokee dies when its idling sometimes


Does it idle up and down first or just die? Idle isues are tricky and are usually just a vac leak (a hole in a hose between your Mass Air Flow sensor MAF and your carborator/throttle body). 1st Visually inspect those hoses and then spray some carb cleaner on these parts too and listen for the engine to rev up a tad. If it revs when carb cleaner hits it...that's your leak. 2nd If the idle is bouncing up and down, it may be your Idle Air Control Valve IAC. Test the IAC by disconnecting the electrical connector and listen for change. If no change...replace the IAC. You can also test the Resistance of the IAC with a DMM...this will be in a chilton/Hanes guide. You can also spray MAF cleaner onto the MAF sensor within the MAF however, if the MAF goes out the car usually will not start. (Do Not spray Carb cleaner on the MAF)!!! Good Luck

May 19, 2012 | 2006 Jeep Grand Cherokee

1 Answer

After my car stalling and then starting and not staying running longer than a minute we replaced the fule filter, fuel pump, and fuel pump strainer. Now it runs and drives, but it idles high around 1.5 to...


Remove the mass air flow,and clean it with intake cleaner spray,or mass air flow cleaner spray,if this does not help,reset the system again,by removing the negative battery cable for at least 20 seconds,then put it back on,if this does not help,replace the mass air flow sensor

Oct 25, 2011 | 1995 Ford Windstar

1 Answer

When my Malibu is in park or in neutral, the RPMs run between 250 and 3. when my car is in drive or reverse the RPMs run normal. How do I adjust the high idol? where is this located?


There is no idle adjustment. That is controlled by the computer via the idle air solenoid. You can try cleaning the throttle body though. In fuel injected engines the throttle plate gets gummed up where in older cars it was kept clean by the gasoline flowing through it. Use any name brand carb cleaner that is marked "sensor safe" and spray around the perimeter of the throttle plate and also do that while running. After cleaning, it should run better. You can also clean off the cross wires inside the bore of the mass air flow sensor using a q tip and the same carb cleaner. Gunk buildup on the wires changes the way the sensor reads air flow.
Any questions about anything you don't understand, just ask.

Jun 28, 2011 | 2001 Chevrolet Malibu

1 Answer

Does a 1996 Ford Taurus 3.0 have a hot wire type mass air flow sensor or a vane type? Would spraying carb cleaner into the MAF fix the problem of hard cold engine start? Once the engine warms up does the...


TheMobilian, Yes, the Mass Air Flow is a Hot Wire type. There is a spray made for the mass called mas air flow cleaner. Regular cab cleaner is too harsh and can eat the coating inside mass air flow and it's delicate parts. Use throttle bore foam cleaner; it works like bathroom scrubbing bubbles and eats the gum and varnish. When engine warms up (closed Loop) both sensors work together giving input to ecm for output. Have someone with a live data reader read both sensors. (Let me know the readings?)


Image Mass Air Flow(MAF)Sensor

PURPOSE

The Mas s Air flow (MAT) sensor measure s the amount of air flowing into the engine.

This value is used by the Powertrain Control Module (PCM) in calculating the required

Fuel injector pulse within order to provide the desired air fuel ratio. This input can also

be used in determining Electronic Pressure Control (EPC). Shift and torque converter

clutch scheduling.

CONSTRUCTION

The MAE sensor is located directly in the airflow path between the air cleaner housing

and the throttle body. Ail air entering the intake manifold must pass through the sensor.

Located in the MAT sensor directly in the airstream are two platinum wires, a hot wire

heated by electrical current and a cold reference wire. The MAF sensor uses the air flow

across these wires to calculate its output.

OPERATION

The hot wire is maintained at 200CC (392CF) above ambient temperature as measured by

a constant cold *e. The current required to maintain the temperature of the hot wire is

proportional to the air mass flow. The MAE sensor then measures the amount of

electrical current required to maintain this temperature difference and converts this

value to an analog DC voltage. This output varies directly with the mass air flow rate.



Pay attention to the Paragraph about the torq converter.


Dec 17, 2010 | 1996 Ford Taurus

1 Answer

99 Eclipse 2.4 cid idles erratically and eventually stalls. Unplug the air flow meter and idle quality gets much better and does not stall. Does this mean I have a defective air flow meter? Engine codes...


couple of possible problems

first thing i would check is to make sure air intake hose between Mass air flow sensor and intake doesn't have any cracks holes make sure clamps are tight

secondly check for vacuum leaks carb cleaner works great for this spray around intake gaskets throttle body fuel injectors vacuum lines when spraying u notice change in idle (if idle picks up or stubles) that where your problem is example you spray around intake gasket and idle picks up you have bad intake gasket

third thing is to try and clean the mass air flow sensor they make special cleaner for this (u can use carb cleaner for this but it can leave residue on sensor and damage it so it not recomended)

my best guess for you with all three o codes is you have a vacuum leak somewhere

Nov 13, 2010 | Mitsubishi Eclipse Spyder Cars & Trucks

2 Answers

When i start my car in the mornings to warm up it idles for about 5 minutes then the starts to jump up and down from about 1500 rpms to about 2500 rpms one the car warms up more then its from 1000 to 1500...


Try unplugging the mass air flow sensor and see if it levels out.If so I would change the mass air flow sensor.If not try the same technique with the throttle position sensor.

Feb 16, 2010 | 1991 Mitsubishi Eclipse

1 Answer

2003 Ford Focus will not idle


try cleaning the MAF Mass Air Flow sensor element wire in tube with a toohtbrush and carb cleaner carefully. It gets coated with a film. It is in air inlet hose and has a wiring connector on it. Then drive for 15 minutes so it can learn the clean MAF sensor. Is check engine light on?

Removal
  1. Remove the air cleaner outlet pipe.
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  1. Disconnect the mass air flow (MAF) sensor electrical connector.
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  1. Remove the MAF sensor.
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Installation
  1. To install, reverse the removal procedure.
Otherwise, you may need to adjust idle air control (IAC).

report on results.

Mar 19, 2009 | 2003 Ford Focus

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