Correct Maf Reading 1998 F150 4.6 Liter

Testing the MAF (Mass Air Fdepression) sensor on your Ford truck or SUV or total size van is a very simple and piece of cake thing. This commodity volition walk you through the whole procedure without removing the MAF sensor from the engine. As you may already know, the MAF sensor is within the round air filter canister assembly and this article will teach you how to test it.

The MAF sensor exam/diagnostic tin can be achieved in iv easy steps using a multimeter. You don't fifty-fifty need a scan tool! Below you'll discover important pre-test info that'll speed upwards the diagnostic process.

If you lot're looking for the commodity on how to examination the Ford MAF sensor that's non within the air filter canister associates, get here: How To Exam Ford MAF Sensors Using A Multimeter.

OK, one last thing before we jump into the test, if yous're diagnosing a iv.6L or five.4L pick up or SUV, let me just make y'all aware where you can notice a complete listing of 4.6L and 5.4L 'How To Examination' articles that are located in this Web Site and at troubleshootmyvehicle.com and this list is found here: Ford 4.6L, 5.4L Index Of Articles.

You lot can discover this tutorial in Castilian here: Cómo Probar El MAF Ford (iv.2L, 4.6L, 5.4L) (at: autotecnico-online.com).

Common Symptoms Of A Bad Ford MAF Sensor

This list covers the majority of symptoms I've seen on these types of Ford mass air flow sensors:

1. MAF Codes that light up the cheque engine low-cal (CEL) on your instrument cluster.
   1. P0102: Mass Air Menses (MAF) Circuit Low Input.
   2. P0103: Mass Air Menses (MAF) Excursion High Input.
2. MAF sensor malfunction that DOES NOT light up the check engine light (CEL).
3. Lean and/or Rich code(due south).
4. Fuel Trim code(s).
5. A tremendous lack of power upon acceleration.
6. Black smoke coming from the tail-pipe.
7. Bad gas mileage.
8. Vehicle may idle rough and stall.

Is My Ford MAF Sensor Just Muddy?

MAF sensors have a tremendous trend to become dingy and cause several headaches that may include: bad gas mileage, higher emissions, and/or lack of power. For the virtually function, when i is dirty, the truck, or van or SUV seems to drive OK, but not with the same peppiness as before. And then how do I diagnose a dirty/contaminated Ford MAF sensor? Well:

1. I'll take a quick look before I start my diagnostic and see if the two hot-wires (that make upward the MAF sensor) are dirty. Past dirty I mean 'contaminated' (to employ an industry standard term). To see an instance of this: Dirty MAF Sensor Example.
2. Or, I'll examination it start following the guidelines prepare in this article, to see if information technology'southward producing a MAF signal.
3. If it is producing a signal, but the betoken's response is besides slow to changes in throttle position, then I know to look into cleaning it.

Why does it go dirty/contaminated? Well, it's usually due to an air filter non performing its chore or the round plastic canister associates, that holds the air filter, is broken or non sealing correctly. The Ford MAF sensors are some of the easiest MAF sensor to clean. To run across/read the step by step instructions on how to make clean this type of Ford MAF sensor in the circular air filter canister, click hither: Cleaning The Ford Canister Type MAF Sensor.

Air Leaks Wreaking Havoc On MAF Sensor Control

The 2nd most common problem I have encountered on most Fords (Mercurys and Lincolns) over the years is air leaks between the MAF sensor and the throttle body. Information technology is crucial, aye very critical that yous showtime check that there are no air leaks between these two. Air entering after the mass air flow sensor into the engine will negatively touch fuel injection. And volition skew the results of your tests which could event in the replacement of a good MAF (and in the procedure throwing money abroad).

How exercise y'all check for air leaks? With your optics and hands. That's right, no special tools required. Only eyeball and physically shake/motion the safety air ducts that connect the MAF sensor to the throttle body to see if it's loose or disconnected.

Circuit Descriptions Of The Ford MAF Sensor's Connector

Whether your driving a Ford, Mercury or Lincoln full size choice up (F150-F350), SUV, or full size van (E150-E350) the circuits descriptions of the wires coming out of the round air filter canister are the same. Yous'll notice that the photos (in the prototype photo in a higher place) have the MAF connectors numbered i thru' 4. I'll be using these numbers for the circuit descriptions. Here'due south the description of each excursion beneath:

1. Number 1:
   1. MAF Bespeak.
2. Number 2:
   1. Basis that the ECM provides.
3. Number iii:
   1. Ground.
4. Number iv:
   1. 12 Volts.

To test these circuits you'll demand to apply a tool to pierce the wire to exist tested. I recommend using a wire-piercing probe since it'll exist the most constructive and easiest way of getting to the signal. If you need to run across what this tool looks similar, click here: Wire-Piercing Probe. Independent of the method you use, exist careful not to damage the wire(due south). Take all safety precautions.

Another important thing to note is that the color of the wires (coming out of your Ford, Lincoln or Mercury pick upwards or SUV or van) does non affair. In other words, the circuit description/job of the wire is the same regardless of Make/Model and color of the wire.

Important: All of the tests are ON CAR TESTS, do not remove the mass air flow sensor from the vehicle or from its plumbing.

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Source: https://easyautodiagnostics.com/ford/4.6L-5.4L/maf-sensor-tests-1