Fleetwood V8-252 4.1L VIN 8 FI (1983)
5.
If the previous tests fail to resolve the condition, replace the restricted section of exhaust pipe between the exhaust manifold and the catalytic
converter.
If the catalytic converter is found to be restricted, this failure may be due to one of the following. To prevent the possibility of repeated failures, these
possibilities should be thoroughly investigated.
1.
Rich operation due to fuel system control problems or misfiring spark plugs.
2.
Improper operation of the Air Injection Reaction (AIR) System.
3.
Oil or coolant consumption due to broken or aligned piston rings, leaking intake manifold gasket or valve guide seals, or other mechanical causes.
4.
Use of leaded fuel.
