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Testing the MAF (Mass Air Flow) sensor on her Ford truck or SUV or complete size valve is a very straightforward and straightforward affair. This short article will go you with the whole procedure without removing the MAF sensor from the engine. Together you may currently know, the MAF sensor is within the ring air filter canister assembly and this write-up will teach you exactly how to check it.

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The MAF sensor test/diagnostic deserve to be achieved in four easy measures using a multimeter. Friend don"t even need a scan tool! below you"ll find important pre-test information that"ll rate up the diagnostic process.

If you"re in search of the post on just how to test the Ford MAF sensor that"s no inside the air filter canister assembly, walk here: just how To check Ford MAF Sensors utilizing A Multimeter.

OK, one last thing before we jump right into the test, if you"re diagnosing a 4.6L or 5.4L choose up or SUV, let me just make you aware where girlfriend can uncover a finish list of 4.6L and 5.4L ‘How come Test’ articles that are situated in this net Site and also at troubleshootmyvehicle.com and also this list is uncovered here: Ford 4.6L, 5.4L table of contents Of Articles.

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friend can discover this indict in Spanish here: Cómo Probar El MAF Ford (4.2L, 4.6L, 5.4L) (at: autotecnico-online.com).

Common symptom Of A negative Ford MAF Sensor

This perform covers the bulk of symptoms I"ve viewed on these varieties of Ford massive air flow sensors:

MAF Codes the light up the examine engine light (CEL) on her instrument cluster.P0102: massive Air flow (MAF) Circuit short Input.P0103: mass Air circulation (MAF) Circuit High Input.MAF sensor break down that DOES no light increase the inspect engine irradiate (CEL).Lean and/or rich code(s).Fuel Trim code(s).A tremendous absence of power upon acceleration.Black smoke comes from the tail-pipe.Bad gas mileage.Vehicle might idle rough and also stall.

Is my Ford MAF Sensor simply Dirty?

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MAF sensors have a tremendous propensity to gain dirty and also cause numerous headaches that may include: negative gas mileage, higher emissions, and/or lack of power. For the most part, when one is dirty, the truck, or valve or SUV seems to journey OK, however not v the same peppiness together before. So exactly how do ns diagnose a dirty/contaminated Ford MAF sensor? Well:

Or, I"ll check it first following the guidelines set in this article, to see if it"s developing a MAF signal.If the is creating a signal, however the signal"s response is too slow to changes in throttle position, climate I recognize to look right into cleaning it.

Why go it obtain dirty/contaminated? Well, it"s usually because of an wait filter no performing its project or the round plastic canister assembly, that holds the air filter, is damaged or not sealing correctly. The Ford MAF sensors are some of the simplest MAF sensor to clean. Come see/read the step by action instructions on just how to clean this kind of Ford MAF sensor in the ring air filter canister, click here: clean The Ford Canister form MAF Sensor.

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Air Leaks Wreaking destruction On MAF Sensor Control

The 2nd most usual problem I have encountered on many Fords (Mercurys and Lincolns) end the year is waiting leaks in between the MAF sensor and the throttle body. The is crucial, correct very an important that you first check that there space no air leaks between these two. Air entering after the fixed air flow sensor into the engine will certainly negatively affect fuel injection. And will skew the outcomes of your tests i m sorry could result in the instead of of a great MAF (and in the process throwing money away).


How execute you inspect for waiting leaks? through your eyes and also hands. That"s right, no special tools required. Simply eyeball and also physically shake/move the rubber wait ducts that affix the MAF sensor come the throttle body to check out if it"s loose or disconnected.

Circuit descriptions Of The Ford MAF Sensor"s Connector

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Whether your driving a Ford, Mercury or Lincoln complete size choose up (F150-F350), SUV, or full size valve (E150-E350) the circuits explanation of the wires coming the end of the ring air filter canister are the same. You"ll notification that the photos (in the picture photo above) have actually the MAF connectors numbered 1 thru" 4. I"ll be utilizing these numbers because that the circuit descriptions. Here"s the summary of every circuit below:

Number 1:MAF Signal.Number 2:Ground the the ECM provides.Number 3:Ground.Number 4:12 Volts.

To test these circuits you"ll should use a tool to pierce the cable to be tested. I recommend using a wire-piercing probe due to the fact that it"ll be the many effective and also easiest means of obtaining to the signal. If you have to see what this tool looks like, click here: Wire-Piercing Probe. Independent of the an approach you use, be careful not to damages the wire(s). Take it all security precautions.

Another important thing to note is the the color of the wires (coming out of your Ford, Lincoln or Mercury choose up or SUV or van) does no matter. In other words, the circuit description/job that the wire is the same regardless that Make/Model and also color the the wire.

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IMPORTANT: every one of the tests space ON automobile TESTS, perform not eliminate the mass air flow sensor from the automobile or indigenous its plumbing.