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DIAGNOSIS AND TESTING EXHAUST SYSTEM DIAGNOSIS CONDITION POSSIBLE CAUSES CORRECTION EXCESSIVE EXHAUST 1. Exhaust manifold cracked or 1. Replace manifold. 2. Manifold to cylinder head leak. 2. Tighten manifold and/or replace gasket. 3. Exhaust flex joint to manifold leak. 3.Tighten fasteners or replace gasket. 4. Exhaust flex joint. 4. Replace catalytic converter assembly. 5. Pipe and shell noise from front 5. Characteristic of single wall pipes. EXCESSIVE EXHAUST 1. Leaks at pipe joints. 1. Tighten or replace clamps at leaking 2. Burned, blown, or rusted out 2. Replace muffler or exhaust pipes. 3. Restriction in muffler or tailpipe. 3. Remove restriction, if possible or replace 4. Catalytic converter material in 4. Replace muffler and converter assembly. Fig. 1 Exhaust System 1 - FLEX PIPE 4 - MUFFLER 11 - 2 EXHAUST SYSTEM AND TURBOCHARGER PT EXHAUST SYSTEM AND TURBOCHARGER (Continued) |