The MAF sensor's job is to measure the amount of air that the engine is breathing. IMPORTANT: All of the tests are ON CAR TESTS, do not remove the mass air flow sensor from the vehicle or from its plumbing. Independent of the method you use, be careful not to damage the wire(s). If you need to see what this tool looks like, click here: Wire-Piercing Probe. To test these circuits I recommend using a wire-piercing probe since it'll be the most effective and easiest way of getting to the signal. Here's the description of each circuit below: I'll be using these letters for the circuit descriptions. You'll notice that the photos (in the image viewer) have the MAF connectors lettered A thru' C (if you look closely at the MAF sensor connector, you'll see these letters on it too). Whether your driving a Buick, Olds, or Pontiac vehicle (with a 3.1L or 3.3L or 3.8L V6) the circuits descriptions of the wires coming out of the mass air flow (MAF) sensor are the same. Circuit Descriptions Of The GM MAF Sensor Connector I would also recommend using a wire-piercing probe to to test the signal of each wire (to see what this tool looks like, click here: Wire-Piercing Probe. A scan tool (Automotive Diagnostic Scanner) is not needed. The most important tool that you're gonna' need is a Digital Multimeter that can read high Hertz (Hz) Frequency (don't have a digital multimeter that can read Hertz frequency? Click here to see my recommendations: Buying A Digital Multimeter For Automotive Diagnostic Testing). A tremendous lack of power upon acceleration.MAF sensor malfunction that DOES NOT light up the check engine light (CEL).MAF Codes that light up the check engine light (CEL) on your instrument cluster.This list covers the majority of symptoms I've seen on these types of GM mass air flow sensors: You can find this tutorial in Spanish here: Cómo Probar El Sensor MAF GM 3.1L, 3.3L, 3.8L (1988-1996) (at: ).
#Mass airflow system for a 1987 oldsmobile delta 88 how to#
How To Test The GM Mass Air Flow Sensor: GMC Savana Van and Chevy Express Van 4.3L, 5.3L, 6.0L Engines (2003-2008).How To Test The GM MAF Sensor: Buick, Chevy, Olds, Pontiac 3.8L V6 Engines (1996-2005).How To Test The GM Mass Air Flow Sensor (Early Type): Buick, Chevy, Olds, Pontiac 3.1L, 3.4L, 4.3L, 5.0L, 5.7L V6 Engines (1996-2005).Now, in case this is not the article you're looking for, there are also 3 other GM MAF sensor test articles: On the column on the right, you'll find an application list of GM makes and models that use this type of MAF sensor. This section includes important information that will help you make this MAF Test a breeze. This is an ON CAR Test that's accomplished in three (3) easy test steps.
If you need to just clean the MAF sensor, you can find this article here: Cleaning The MAF Sensor (at: ). This article will show you how to test and diagnose a bad GM mass air flow (MAF) sensor on all of the early 90 thru' mid 90's Buick, Olds, Pontiac 3.1L, 3.3L and 3.8L V6 equipped cars (to be more specific: 89-96).
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