For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Inspect the exhaust pipes. Are the pipes bent? | -- | Go to Step 2 | Go to Step 3
2 | Repair or replace the exhaust pipe(s) as needed. Is the exhaust system still restricted or exhibit excessive back pressure? | -- | Go to Step 3 | System OK
3 | Inspect the muffler/resonator. Is there a restriction in the muffler/resonator? | -- | Go to Step 4 | Go to Step 5
4 |

1. Remove the muffler/resonator.
2. Inspect the muffler/resonator forrestrictions.
3. Replace the muffler/resonator if needed. Refer to Muffler Replacement .

Is the exhaust system still restricted or exhibit excessive back pressure?

--

Go to Step 5

System OK

5 | Inspect the tailpipe end. Is there an obstruction in the tailpipe end? | -- | Go to Step 6 | Go to Step 7
6 |

1. Remove the obstruction.
2. Replace the muffler/tailpipe if either is damaged. Refer to Muffler Replacement .

Is the exhaust system still restricted or exhibit excessive back pressure?

--

Go to Step 7

System OK

7 | Inspect the catalytic converter. Is the catalytic converter plugged? | -- | Go to Step 8 | --
8 |

1. Remove the obstruction.
2. Replace the converter if damaged. Refer to Catalytic Converter Replacement .

Is the exhaust still restricted or exhibit excessive back pressure?

--

--

System OK