Inspection Procedure
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the throttle body bolt inserts for looseness or damaged threads.
- Inspect the fuel rail bolt inserts for looseness or damaged threads.
- Inspect the intake manifold vacuum passages for debris or restrictions.
- The manifold absolute pressure (MAP) sensor housing is retained to the intake manifold by push-in-place snap lock design.
- The MAP sensor housing is sealed at the intake manifold by an O-ring seal.
- Inspect the MAP sensor housing.
- Inspect for damaged or broken vacuum fittings, damaged MAP sensor mounting bore, or broken MAP sensor retaining tab.
- Inspect the rear MAP sensor housing for looseness or poor sealing to the intake manifold. Repair or replace the components as necessary.
- Inspect the composite intake manifold assembly for cracks or damage.
Inspect the areas between the intake runners.
- Inspect all the gasket sealing surfaces and grooves for cracking or damage.
- Inspect the fuel injector bores for excessive scoring or damage.
- Inspect the intake manifold cylinder head deck for warpage.
- Locate a straight edge across the intake manifold cylinder head deck surface.
- Insert a feeler gauge between the intake manifold and the straight edge.
A intake manifold with warpage in excess of 0.5 mm (0.02 in), must be replaced.
- Upon completion of inspection, install the MAP sensor to the manifold.
IMPORTANT: