Inspect the exhaust pipes.

Are the pipes bent?

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Go to Step 2

Go to Step 3

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

Inspect the muffler/resonator.

Is there a restriction in the muffler/resonator?

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Go to Step 4

Go to Step 5

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

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

--

Go to Step 5

System OK

Inspect the tailpipe end.

Is there an obstruction in the tailpipe end?

--

Go to Step 6

Go to Step 7

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

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

--

Go to Step 7

System OK

Inspect the catalytic converter.

Is the catalytic converter plugged?

--

Go to Step 8

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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