Probable Causes
WARNING: This page does not describe the selected car, but rather 35 other vehicles, including the 1992 Pontiac Trans Sport, 1992 Oldsmobile Silhouette, 1992 Oldsmobile Bravada, 1992 GMC Yukon, and 1992 GMC Vandura Special. However, it is still accessible from the selected car via links, so may be relevant.
- Clogged air filter element.
- Obstructed air intake duct to turbo compressor.
- Obstructed air outlet duct from compressor to intake manifold.
- Obstructed intake manifold.
- Air leak in duct from air cleaner to compressor.
- Air leak in duct from compressor to intake manifold.
- Air leak at intake manifold-to-engine joint.
- Obstruction in exhaust manifold.
- Obstruction in exhaust system.
- Gas leak in exhaust manifold-to-engine joint.
- Gas leak in turbine inlet-to-exhaust manifold joint.
- Gas leak in ducts after turbine outlet.
- Obstructed turbocharger oil drain line.
- Obstructed engine crankcase ventilation.
- Turbocharger center housing sludged or coked.
- Engine camshaft timing incorrect.
- Worn engine piston rings or liners (blow-by).
- Internal engine problems (valves, pistons).
- Dirt caked on compressor wheel and/or diffused vanes.
- Damaged turbocharger.