Diagnostic reference
Exhaust Restrictions
Diagnose restricted catalytic converters and exhaust systems
Overview
An exhaust restriction can prevent the engine from efficiently expelling exhaust gases and can cause severe power loss.
Common Symptoms
Possible symptoms include:
- Loss of power under load
- Poor high-RPM performance
- Excessive exhaust backpressure
- Abnormal manifold vacuum behavior
- Excessive catalytic converter temperature