Tuesday, May 13, 2014
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Replacing the mass air flow sensor on your 2000 Buick 3.8-liter engine is relatively straightforward. The MAF sensor sits on top of the throttle body just above the air intake. The MAF sensor is a flat, plastic piece held in place with several screws and has an electrical connector attached to its left side. Replacement OE MAF sensors are available through the dealer and aftermarket replacements are available from most auto-parts stores.
Instructions
1 Open the hood of your Buick and locate the throttle body on the front of the engine. The air intake hose attaches to the front of the throttle body, making it easy to identify.
2 Disconnect the electrical connector from the end of the sensor by lifting the locking tab on the connector, then pulling it straight off the sensor. Locate the two screws on the top of the sensor--they are at opposite corners--and remove them with a Torx screwdriver.
3 Lift the MAF sensor straight up and away from the throttle body. Discard it and position a new MAF sensor on the throttle body, aligning the screw holes in the sensor with the threaded holes on the throttle body.
4 Install the two Torx-head retaining screws through the MAF sensor and into the throttle body. Tighten them with a Torx screwdriver, then push the electrical connector onto the end of the new sensor, making sure the locking tab snaps in place.
Thursday, May 8, 2014
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Cars need to breathe. Too much or too little air will cause big problems for your engine. Make sure you know what a remanufactured air flow sensor is, how it helps your vehicle breathe and when you may need one.
The air flow sensor (AFS) measures how much air enters the engine on vehicles that have an electronic fuel-injection system. The sensor allows the vehicle to let more or less air into the engine, which controls idle speed and acceleration.
A remanufactured part is different from a rebuilt part. When you rebuild a part, you only replace the broken pieces. When something is remanufactured, the entire piece, called the core, is taken apart. All pieces are then cleaned, repaired or replaced.
If your vehicle begins to stall, misfire or accelerate slowly or not at all, you might need to replace your AFS. In this case, a remanufactured sensor will cost less than a new one. Have your vehicle checked by a certified mechanic before buying or trying to replace it yourself.
Tuesday, October 15, 2013
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A cars engine depends on a balanced ratio of fuel and air for proper combustion and sufficient horsepower. A faulty exhaust gas recirculation (EGR) valve affects the functioning of the mass air flow (MAF) sensor for an engines air flow.
The EGR valve allows a small quantity of exhaust gas from the combustion chamber into the engines intake manifold, resulting in a cooling of combustion fumes. The MAF sensor, also known as the air flow meter, calculates the amount of air entering the engine for balancing with the fuel.
Typically, a faulty EGR valve leaks more gas into the engines intake manifold, which has a direct effect on the MAFs functioning. The MAF detects more gas or air within the system and automatically adds more fuel to the mixture to balance the fuel-to-air ratio.
A faulty EGR valve requires immediate replacement. Aside from wasting excess fuel from an improper fuel-to-air ratio, a faulty EGR valve releases harmful emissions into the atmosphere.
