For 1990-2009 cars

1. Clean the intake manifold tube.
2. Clean the intake manifold tube mating surfaces.
3. Inspect the intake manifold tube for cracks.
4. Inspect the intake manifold tube mating surfaces for damage.
5. Replace the intake manifold tube if any damage is found.
6. Clean the intake manifold.
7. Clean the intake manifold mating surfaces.
8. Inspect the intake manifold for cracks.
9. Inspect the intake manifold mating surfaces for damage.
10. Replace the intake manifold if any damage is found.