Examine the exhaust tubing.

Is the exhaust tubing kinked?

--

Go to Step 2

Go to Step 3

If possible, repair the damaged exhaust tubing. Otherwise, replace the exhaust tubing.

Is the exhaust system restricted?

--

Go to Step 3

System OK

Inspect the muffler for restrictions.

Is the muffler restricted?

--

Go to Step 4

Go to Step 5

1. If a restriction in the muffler is likely, remove the muffler and visually inspect it.
2. If damaged, replace the muffler. Refer to Muffler Replacement .

Is the exhaust system restricted?

--

Go to Step 5

System OK

Inspect the end of the tail pipe.

Is the end of the tailpipe obstructed?

--

Go to Step 6

Go to Step 7

Remove the obstruction from the end of the tailpipe, or if the end is crimped, straighten it out.

Is the exhaust system restricted?

--

Go to Step 7

System OK

Check for blockage in the three-way or close-couple catalytic converter, which may be a result of serious engine malfunction.

Is the three-way or close-couple catalytic converter blocked?

--

Go to Step 8

--

Replace the three-way or close-couple catalytic converter. Refer to Catalytic Converter Replacement .

Is the exhaust system restricted?

--

--

System OK