Front or Rear Suspension Problems

Have a suspension problem on your car or truck? Read articles to help diagnose a problem.

I work for a fishing company, and we have a 1972 Chevy pickup with a 454. The rear drive shaft is turning, but the rear wheels are not getting full power if any. the front tire was spinning and buried it self, with out breaking the back ones loose on the sand. Then once the truck was axle deep and no longer moving, neither were the rear wheels.

Ride is Too Soft

Inspect for worn shocks, struts, mounts, worn incorrect or broken springs.

Ride is Too Hard

Check for incorrect shock or strut type, tire pressure too high.

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How Things Work

Air Bag (SIR) System Function and Operation

The Supplemental Inflatable Restraint (SIR) system supplements the protection offered by the driver and front passenger seat belts. The SIR system deploys an air bag from the center of the steering wheel and from the right side of the instrument panel. The knee bolsters and the steering column absorb crash energy. The driver and passenger knee bolsters are below the instrument panel.

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Common Engine Codes

Evaporative Emissions Leak Code P0440 - P0455

P0440 - P0455
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED .

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