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#Duramax lb7 mass air flow sensor problems how to
#Duramax lb7 mass air flow sensor problems free

Its acting like that again but not from a dead stop and the cleaning doesn't seem to make much difference. I used Mass air cleaner and it seemed to fix things. So i'm thinking maybe a MAFS? I know it got a lilttle "oiled" / dirty a while back when I installed a new S&B air filter where it was actually stumbling a bit when you first accelerated. But from a roll there is a significant lag before it takes off, then it pulls pretty hard as well.

#Duramax lb7 mass air flow sensor problems free

If there is anything that you would like to add, please feel free to leave a comment below.Just did head gaskets, injectors, opened up turbo inlet and LMM exha manifold on an 02 LB7 and the throttle seems to be a little flat from any significant roll. Replacing a bad MAF sensor can make your Silverado feel like a new vehicle. About a dozen small bursts will be all that you need.

Clean the Sensor– Now that you’ve removed your Silverado’s MAF sensor, it’s time to clean it.

Simple hand tools will be all that you need to complete the job.

Remove the Sensor- Take care not to damage the wiring harness or the connector pins that receive the harness in the MAF.

Locate the MAF Sensor– It’ll be in between the air filter and the throttle body.

It sure beats the heck out of having to buy a new sensor. It’s really cheap and available at any parts store. This is a bad idea, it can ruin the sensor. Some folks recommend using alcohol because it’s usually on hand, and can clean the sensor. Often, the mass airflow sensor really only needs cleaning when they go bad.

#Duramax lb7 mass air flow sensor problems how to

Here’s a fantastic video on how to diagnose a bad MAF sensor using a multimeter from Ratchets and Wrenches on YouTube. There are other codes related to the mass air flow sensor as well, but these are the most common ones. Chevy Silverado P0102: MAF Sensor Circuit Low.Chevy Silverado P0101 Diagnosis: MAF Sensor.The two most common trouble codes in relation to the MAF sensor are: This is great because it helps you narrow down the problem. If the MAF sensor has gone bad, it’ll trigger the check engine light and provide an OBDII trouble code. Here a couple of common MAF sensor styles Decreased Fuel Mileage– Fuel mileage can suffer without the proper air/fuel mixture.Also, jerking can be caused by bad spark plugs or coil packs. It’s bad for your motor mounts when this happens.

Jerking– As you go down the road, you’ll feel your Silverado really jerk and hesitate as the engine speed changes erratically.

And when it does, it doesn’t usually run very well.

Hard to Start– Without knowing the proper amount of air entering into the intake, it can be really difficult for the engine to start.

The exhaust color usually doesn’t change. A lean condition is when there is too much air relative to fuel in the air fuel mixture. The exhaust color is usually darker when running rich. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture.

Idle Issues– Your Silverado may run rich or lean when idling, or it may also idle erratically.

Here are the most common symptoms of a bad or failing MAF sensor: When the mass airflow sensor has gone bad, you’ll definitely feel it. And, most of the time they are right by the air box and easy to replace.įaulty Mass Airflow Sensor Symptoms: Chevy Silverado

If you do determine that you need a new mass airflow sensor, they aren’t too expensive. The ECU uses this information along with other sensor data to control the amount of fuel that enters the combustion chamber. It passes this information onto your Silverado’s ECU. A bad mass airflow sensor can leave your Chevy Silverado’s engine running rough, or even inoperable.Ī MAF sensor measures the density of the air entering the intake manifold. The mass airflow sensor (commonly abbreviated to MAF) is one of the most important engine management sensors.