- Difficulty in starting the engine.
- Engine vibrations at idle and engine stops.
- Jerks when accelerating the car.
Test conditions: Engine cold or warm.
1. Start the engine and, with the engine running, cover the muffler with a rag.
2. Listen to the exhaust system to determine leaks. If necessary, spray the cylinder head/exhaust manifold and exhaust manifold/downpipe connections with a leak detector and check for any bubbles that form.
3. Repair the leak.