User manual FERRARI 328 GTB WORKSHOP MANUAL

[. . . ] 70000976 and was introduced into production as of Assembly No. Our Parts Department will only supply the kits provided with the new retaining clips for the brake pads. ______________________________ Ferrari North America, Inc. Technical Department Page 1 of 1 FERRARI NORTH AMERICA, INC. TECHNICAL SERVICE DEPARTMENT TECHNICAL INFORMATION Area 1 Model All 8 Cylinder models Bulletin n° 1215 Date May 2004 Pages 1 SUBJECT: Timing belt for 8-cylinder engines For your information, all 8-cylinder Ferrari models, independent of the Model Year, must have the timing belts replaced every 30, 000 miles or every 3 years, whichever comes first. For information on Timing Belts for 12-cylinder engines, refer to Technical Information Bulletin number 1003 dated October 2002. ______________________________ Ferrari North America, Inc. [. . . ] 1) The system is made up of two solenoid valves (1). They are secured to the Motronic supporting bracket and connected, by means of pipes (2), to the vacuum tank (3) which is found under the right-hand rear mudguard. The engine ECU determines the opening of the solenoid valves, which, in turn, control the pneumatic capsule C3. 06). (4) and the actuator (5), both of which are positioned on the plenum chamber ( The pneumatic capsule (4) controls the compensating throttle through a system of levers. The actuator (5) B 7. 02) using an idler arm and ball-jointed stay rods. activates the intake manifold throttles, ( Exhaust by-pass system (Fig. 2) The system is composed of two solenoid valves (6) fastened to the chassis, on the rear part of the engine compartment. These solenoid valves are both connected to a pneumatic throttle valve (7), fitted on the exhaust terminal, and to the vacuum tank (3). The Motronic ECU for bank 1-4 determines the opening of the solenoid valve according to the engine revolutions and the engaged gear ( C 3. 05). Secondary air injection, (Fig. 2000 version) The solenoid valve (8), fitted next to those of the modular manifold, is controlled by the Motronic for opening/closing the two pneumatic valves (9) which effect the injection of secondary air into the exhaust manifolds. The piping (10), which connects the vacuum tank (3) to the solenoid valve (8), is connected by a 3-way union also to the solenoid valve which controls the actuator (5, Fig. Closed Loop Operation The closed loop control system guarantees the accuracy of the mixture composition which is essential to maximise the efficiency of the trivalent catalytic converter. During standard operation, the signal generated by the oxygen sensors is compared with a predetermined threshold, in order to establish how the ECU will work to bring the mixture to the stoichiometric value. NOTES The oxygen sensors are mounted in the exhaust while the air/fuel ratio correction takes place in the intake system: this means that there is a time delay in the system's checking logic. Open loop Operation The system is controlled by the ECU according to pre-set values, without any corrective action resulting from the oxygen sensor signals, therefore regardless of the oxygen content in the exhaust gases. In conditions of normal use, this mode functions when: 1 - The oxygen sensor is insufficiently hot (sensor temperature below approximately 300 °C). 2 - The engine coolant temperature is below 50 °C (but above ­7 °C). NOTES In analogous conditions (­10 °C < T° < 40 °C), the ECU for the US M. Y. 2000 cars activates the injection of secondary air to the exhaust. 3 - Accelerator in fully-open position (throttle open 72°). 4 - Engine revolution speed > 4000 ± 200 rpm. Open loop Mode for Checks and Diagnosis The open loop mode can also be simulated to check the engine operation when the motor is warm, leaving the oxygen sensors disconnected. Self-Learning Cycle The ECU also performs the so-called "self-learning cycle" for the various engine conditions, which means it is capable of permanently storing the last correction made on the basis of the oxygen sensor signal. [. . . ] 48718 48848 48700 48824 48780 48860 48836 48927 48875 48745 48818 48787 48750 48822 48879 48802 48820 48837 48846 48835 48827 48861 48842 48859 48864 48877 48922 48889 48893 48923 48891 48906 48937 48914 48981 48940 48944 48985 48989 49021 FERRARI NORTH AMERICA, INC. 41 Hydraulic Steering Delivery Pipe Chassis No. 131817 131820 131826 131827 131828 131834 131835 131845 131846 131852 131853 131854 131855 131862 131863 131864 131870 131871 131872 131888 131894 131895 131896 131897 131898 131910 131911 131912 131927 131928 131938 131939 131940 131941 131946 131947 131948 131949 131959 131960 Assembly No. 49033 48911 48904 48921 48915 48931 48934 48991 48946 48949 48987 48988 48982 48992 49016 49019 49035 49018 49039 48941 49034 49040 49056 49037 49072 49058 49074 49104 49075 49083 49014 49159 49099 49013 49098 49123 49119 49096 49118 49146 FERRARI NORTH AMERICA, INC. [. . . ]