Hummer H2 Air Compressor Troubleshooting

Hummer H2 Air Compressor Troubleshooting

The 2008 Hummer H2 is a big, off-road-ready SUV that doesn't shy away from its macho truck heritage.hummer h2 air compressor The biggest changes to this year's model come under the hood where a larger 6.0-liter V8 cranks out 325 horsepower and 365 pound-feet of torque. This new powerplant improves fuel economy and raises towing capacity from a stout 6,400 pounds to an even more impressive 8,000 pounds. The rest of the H2 is unchanged. It still has the kind of off-road capability that can drive through 20 inches of water or climb over boulder size pavement chunks.

Most models come with an air suspension that raises and lowers the rear of the vehicle.hummer h2 air compressor The most obvious sign of suspension trouble is a loss of three to five inches of ride height in the rear of your Hummer. This happens when tiny cracks form in the rubber air springs. These leaks force the onboard air compressor to work overtime trying to keep the system inflated. By the time these cracks and leaks get out of hand, the compressor overheats and shuts off.

A replacement compressor can cost hundreds of dollars or more.hummer h2 air compressor A less expensive fix is to install a new air pressure sensor in the vehicle. This is a small metal tube filled with gas-charged hydraulic fluid that controls the bouncing motion and dampens vibration caused by traveling on rough road surfaces. If the air pressure sensor starts to wear out, you'll be able to tell by the fact that your Hummer will only run at part-time, as it's no longer able to raise the rear of your vehicle when you hit a bump or dip.

Another possible cause of your Hummer's poor performance is a bad suspension control module.hummer h2 air compressor The control module is located under the hood and is responsible for reading signals sent from each of the suspension height sensors. These sensors are small linkages that are constantly measuring the ground clearance of your vehicle and reporting this information to the control module. When the sensors wear out, they stop sending accurate data to the control module.

A simple way to check the air pressure in your Hummer's rear air suspension is to simply raise it to its Extended Ride Height using the ERH button on the dash. A properly working system should rise up about three inches. If you notice that your Hummer only rises about one inch, the sensor or the compressor is having a problem and needs to be replaced. This could also indicate a clogged inlet filter, a worn compressor, or an overworked air pump. If the rear air pump tries to fill your tires but fails, this indicates that you have a leaking air suspension sensor or a damaged or overheated compressor. The inlet air filter is located under the driver's side fender well and may need to be cleaned or replaced. This is a cheap and easy repair. The filter can be purchased at your local auto parts store.

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