Volvo 850 Made from 1993 to 1997, this Volvo line was available in both a wagon and a sedan, both with were graced with several trim levels.

How to test an Air Mass Sensor on a 93' 850?

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Old 06-13-2007, 01:26 PM
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Default How to test an Air Mass Sensor on a 93' 850?

Hey gang,

VIN: YV1LS5504P2086953

Build Date: 05/93

Mileage: 142857

Now I have searched and read that if the Air Mass Sensor is pulled and the car starts and runs (with revs I presume) and if the sensor is plugged back in and the car idles rough and does not rev or accelerate, the the Air Mass Sensor is bad.

Now, to test the Air Mass Sensor, do I unplug the electrical harness from the Air Mass Sensor and test, or do I unplug / take out the Air Mass Sensor and then run the test?

Thanks in advance for your advice / help!
 
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Old 06-13-2007, 11:04 PM
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Default RE: How to test an Air Mass Sensor on a 93' 850?

Hi,

The MAF sensor is noted for causing trouble, but it's actually the wiring. The sharp bend causes intermittent problems. Try wiggling the wire to see if the engine responds. If not, you may need a new sensor.


JPN
 
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Old 06-14-2007, 08:52 PM
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Default RE: How to test an Air Mass Sensor on a 93' 850?

Hi BavarianTech and Kanji,

I think you should disconnect the harness. You want to find out
how the car runs without the MAF's influence. I am not sure
whether you need to turn off the engine before disconnecting
it. As JPN mentioned check the wiring first. If that doesn't
help then disconnect the sensor from the harness. If the sensor
does appear to be bad, they can sometimes be cleaned.
Kanji, I hope you're doing ok and will get your internet connection
back soon.

Best regards, John
 
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