Rick's Free Auto Repair Advice

Posts Tagged: MAF

Transmission shifts late

Fix Ford Taurus transmission that shifts late and hard If you own a Ford Taurus and the vehicle is shifting hard into 2nd gear or the shift is occurring late, here’s how to check it out. You’ll have to raise the vehicle on a hoist and test it while running. This can be dangerous, so take safety precautions. You’ll be testing with a digital multimeter. Find the violet/orange wire at the PCM or the transmission solenoid connector on top of the transmission. The PCM provides ground on this wire to … Read More

Bad idle air control valve

Bad idle air control valve symptoms Idle speed goes up and down or high idle First off, this is a fairly common problem for all makes and models. Sometimes the problem is caused by a gummed up or sticking idle air control valve (IAC) or a dirty mass airflow sensor (MAF). But it can also be caused by a vacuum leak. How an idle air control valve works If you’re familiar with older carbureted cars you remember that you turned a screw to set the idle speed. The screw turned … Read More

P0100 trouble code

P0100 trouble code is a MAF circuit malfunction What is a P0100 trouble code A P0100 Mass Airflow (MAF) Circuit Problem relates to a problem with the circuit servicing the mass airflow sensor. Common codes are P0101, P0102, P0103 and P0104. However, a P0100 code means P0100 is the general code for a problem with the Mass Airflow (MAF) Sensor or Circuitry and the most common cause is a disconnected electrical connector or a problem with the terminals/pin in the connector or the wiring harness. However, it can also be … Read More

Clean a MAF sensor

Best way to clean a MAF sensor They say it can’t be done. But at $300 a pop for a new MAF sensor, you’ve got only $6 to lose by attempting to clean the old MAF sensor. Then locate the MAF sensor. It’s between the air filter box and the throttle body. Disconnect the sensor from the duct. Then disconnect the electrical connector. Locate the small circular opening inside the MAF sensor. That houses and protects the hot wire element and the thermistor that measures ambient air temperature. Spray 15 … Read More


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