What is a normal reading for a mass air flow sensor?
With the engine at idle, the MAF’s PID value should read anywhere from 2 to 7 grams/second (g/s) at idle and rise to between 15 to 25 g/s at 2500 rpm, depending on engine size. Most manufacturers provide specifications for air flow at idle; some will provide specifications at several engine speeds.
Can you Ohm a mass air flow sensor?
Testing the MAF sensor’s hot wire: Turn the ignition switch to the Off position. Unplug the MAF sensor’s electrical connector. Set your DMM to the Ohms scale. If the sensor’s hot wire is damaged, your meter will register infinite resistance.
How do you know if your mass airflow is bad?
Here are some of the most common symptoms of a faulty mass airflow sensor: The engine is very hard to start or turn over. The engine hesitates or drags while under load or idle. Hesitation and jerking during acceleration.
How to test the MAF sensor in 1.8L Toyota Corolla?
TEST 1: Checking The MAF Sensor Power Circuit. TEST 2: Checking The MAF Sensor Ground Circuit. TEST 3: Checking The MAF Sensor Signal. You can find this tutorial in Spanish here: Cómo Probar El Sensor MAF (1.8L Toyota Corolla) (at: autotecnico-online.com ).
What happens if you clean the mass air flow sensor?
According to some Toyota forums, cleaning Mass Air Flow (MAF) Sensor can fix low idling. At about 85,000 miles my Corolla’s idle speed decreased from 700 to about 500rpm and felt like it was going to stall sometimes after the AC compressor kicked off.
What does the MAF sensor output at idle?
Here’s what it looks like on a multimeter: At an idle under 1000 RPM’s the MAF sensor outputs about 1.1 Volts DC. At about 1500 RPM’s the math signal output is about 1.2 Volts DC. Ask about 3000 RPM’s the MAF signal output is about 1.7 Volts DC.
What to do if your corolla has low idle?
[update 5/7/14] – Corolla now has 147k miles and the low idle issue returned worse than ever. This time cleaning the MAF sensor didn’t help, so I removed and cleaned the throttle body which was pretty dirty and that fixed the problem. Cleaning the Throttle Body: