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PRECAUTIONS GI-29 < PRECAUTION > C D E F G H I J K L M B GI N O P To prevent ECM from storing the diagnostic trouble codes, do not carelessly disconnect the harness connectors which are related to the engine control system and TCM (transmission control module) system. The connectors should be disconnected only when working according to the WORK FLOW of TROUBLE DIAGNOSES in EC and TM sections. Three Way Catalyst INFOID:0000000009471884 If a large amount of unburned fuel flows into the catalyst, the catalyst temperature will be excessively high. To prevent this, follow the instructions. • Use unleaded gasoline only. Leaded gasoline will seriously damage the three way catalyst. • When checking for ignition spark or measuring engine compression, make tests quickly and only when nec- essary. • Do not run engine when the fuel tank level is low, otherwise the engine may misfire, causing damage to the catalyst. Do not place the vehicle on flammable material. Keep flammable material off the exhaust pipe and the three way catalyst. Fuel (Unleaded Premium Gasoline Recommended) VQ35DE INFOID:0000000009471885 NISSAN recommends the use of unleaded premium gasoline with an octane rating of at least 91 AKI (Anti- Knock Index) number (Research octane number 96). If unleaded premium gasoline is not available, you may use unleaded regular gasoline with an octane rating of at least 87 AKI number (Research octane number 91), but you may notice a decrease in performance. CAUTION: Do not use leaded gasoline. Using leaded gasoline will damage the three way catalyst. Do not use E-85 fuel (85% fuel ethanol, 15% unleaded gasoline) unless the vehicle is specifically designed for E-85 fuel (i.e. Flexible Fuel Vehicle - FFV models). Using a fuel other than that specified could adversely affect the emission control devices and systems, and could also affect the warranty coverage validity. Multiport Fuel Injection System or Engine Control System INFOID:0000000009471886 • Before connecting or disconnecting any harness connector for the multiport fuel injection system or ECM: Turn ignition switch to “OFF” position. Disconnect negative battery terminal. Otherwise, there may be damage to ECM. • Before disconnecting pressurized fuel line from fuel pump to injec- tors, be sure to release fuel pressure. • Be careful not to jar components such as ECM and mass air flow sensor. Hoses INFOID:0000000009471887 HOSE REMOVAL AND INSTALLATION • To prevent damage to rubber hose, do not pry off rubber hose with tapered tool or screwdriver. SGI787 SMA019D |