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ENGINE TUNING DATA 3 INFORMATION ENGINE - 4.2 V8 Type 4.2 Litre V8 ................................................................................. Firing order 1-8-4-3-6-5-7-2 ..................................................................... Cylinder Numbers 1-3-5-7 .......................................................................... Right bank 2-4-6-8 ........................................................................ No 1 Cylinder location Pulley end of left bank ................................................... Timing marks On crankshaft vibration damper .................................................................. Spark plugs Champion RN11YCC ........................................................................ Gap 0.84-0.96mm (0.033-0.038 in) .................................................................................. Coil Bosch 0-221-122-392, (ETC 6574) ........................................................................ Compression ratio 8.94:1 ......................................................... Fuel injection system Lucas 14 CUX Hot-wire air flow sensor system ..................................................... electronically controlled Valve Timing Inlet Exhaust Opens 28 ° BTDC ..................................................................... 72 ° BBDC Closes 64 ° ABDC ..................................................................... 20 ° ATDC Duration 272 ° .................................................................. 272 ° Valve peak 108 ° ATDC .............................................................. 116 ° BTDC Idle speed - controlled by EFi system - all loads off in neutral 665 to 735 rev/min ............................................ -auto gearbox in gear, air con operating 650 ± 28 rev/min ................. -auto gearbox in gear, air con off 600 ± 28 rev/min ............................ -manual gearbox 700 ± 28 rev/min ..................................................... -manual gearbox, air con operating 750 ± 28 rev/min ........................ Base idle speed 525 ± 25 rev/min -. .............................................................. See FUEL SYSTEM, Fault diagnosis, Base Idle Speed Setting Ignition Timing Dynamic, vacuum disconnected 8 ° BTDC ± 1 ° at 800 rev/min max ............................. Exhaust gas 0.5 to 1.0% max. ............................................................ |