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

How Does the Catalytic Converter Work

A 3-way catalytic (TWC) converter is used on most newer cars and trucks in order to control the exhaust emissions of hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx). The catalyst within the converter promotes a chemical reaction which oxidizes the HC and the CO that is present in the exhaust gas. This process will convert the HC and the CO into a water vapor and CO, and will reduce the NOx, converting the NOx into nitrogen.

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Common Engine Codes

Idle Air Control Valve Engine Light Codes

P0506 - P0507
The idle air control (IAC) valve is located in the throttle body of the SFI systems. The IAC consists of a movable pintle, driven by a gear attached to an electric motor called a stepper motor. The IAC valve motor is a two phase bi-polar permanent magnet stepper motor that is capable of highly accurate rotation, or movement, every time the polarity of a winding is changed.

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