| EXCESSIVE EXHAUST NOISE (UNDER HOOD) |
1. Exhaust manifold cracked or broken. |
1. Replace manifold. |
| 2. Manifold to cylinder head leak. |
2. Tighten manifold and/or replace gasket. |
| 3. EGR tube to manifold gasket leakage. |
3. Tighten fasteners or replace gasket. |
| 4. EGR Valve to EGR tube gasket leakage. |
4. Tighten fasteners or replace gasket. |
| 5. Exhaust to manifold leak. |
5. Tighten or replace nuts |
| 6. Pipe and shell noise from front exhaust pipe. |
6. Characteristic of single wall pipe. |
| EXCESSIVE EXHAUST NOISE |
1. Leak at exhaust pipe joints. |
1. Tighten clamps at leaking joints. |
| 2. Burned or rusted out muffler assembly or exhaust pipe. |
2. Replace muffler and resonator assembly and/or LH rear resonator and tailpipe assembly as necessary. |
| 3. Burned or rusted out resonator(s). |
3. Replace RH muffler and resonator assembly and/or RH resonator and tailpipe as necessary. |
| 4. Restriction in exhaust system. |
4. Remove restriction if possible, or replace components as necessary. |
| 5. Converter material in muffler or resonators. |
5. Replace RH muffler and resonator assembly and/or RH resonator and tailpipe as necessary. Check fuel injection and ignition systems for proper operation. |