What gauges should a low vacuum read?

There are three groups of vacuum gauges based on the method of operation, mechanical, thermal conductivity, and ionization….These include:

Absolute pressure gauges;
Medium vacuum gauges – useful down to around 0.001 mbar (1 micron);
High vacuum gauges for use below 0.001 mbar (1 micron).

What is low vacuum range?

Low vacuum is around 10^-4 times the atmosphere. High vacuum is 10^-8 atmospheres. There is even Ultra-High vacuum that is around 10^-12 atmospheres. So when you say something has higher vacuum, it’s the same as saying that there is less air inside.

What is mass airflow sensor on Chevy Impala?

Since P0102 has to do with the Mass Airflow Sensor, which is a huge part of the Impala’s engine combustion process metering, it is going to cause noticeable symptoms. Usually, one or more of these symptoms will occur, but it’s not uncommon to have no symptoms other than the check engine light.

What kind of a / C system does Chevy Impala have?

The A/C system in your Impala consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling.

What does a low vacuum reading mean on a car?

Steady low between 10-15 “hg vacuum: This reading indicates late valve timing. There is a good chance the vehicle has jumped timing. Check the timing belt or chain, depending on the application. Steady low between 15-18 “hg vacuum: This just low reading indicates retarded ignition timing.

How can I add refrigerant to my Chevy Impala?

Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant. The A/C system in your Impala consists of a compressor that is belt-driven, an evaporator and freon.

How to clean the MAF sensor on a Chevy Impala?

Remove the Sensor- Take care not to damage the wiring harness or the connector pins that receive the harness in the MAF. Simple hand tools will be all that you need to complete the job. Clean the Sensor – Now that you’ve removed your Impala’s MAF sensor, it’s time to clean it.

What causes a Chevy Impala to run rich?

Idle Issues – Your Impala may run rich or lean when idling, or it may also idle erratically. A rich condition is when there is not enough air relative to the fuel in the air/fuel mixture. The exhaust color is usually darker when running rich.

Where is the owner manual for a 2012 Chevy Impala?

Chevrolet Impala Owner Manual – 2012 Black plate (4,1) iv Introduction Using this Manual To quickly locate information about the vehicle, use the Index in the back of the manual. It is an alphabetical list of what is in the manual and the page number where it can be found. Danger, Warnings, and Cautions