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ENGINE DATA Engine 3.9 L OHV V6 engine 4.2L OHV V6 engine Cubic inches 232 256 Required fuel 87 octane 87 octane Firing order 1-4-2-5-3-6 1-4-2-5-3-6 Ignition system EDIS EDIS Spark plug gap 0.052–0.056 inch 0.052–0.056 inch Compression ratio 9.36:1 9.27:1 Engine drivebelt routing • 3.9L V6 and 4.2L V6 Engines Maintenance and Specifications 302 |