Ford 300ci 4.9L Inline 6 Firing Order & Distributor Cap Diagram (F-150)

This schematic documents the firing order and spark plug wire routing for the Ford 300 cubic inch (4.9L) in-line six-cylinder engine, as commonly fitted to the 1988 Ford F-150. The diagram shows the engine's six cylinders numbered 1 through 6 from the front of the engine to the rear, along with a distributor cap illustration indicating which cap terminal connects to each cylinder's spark plug (terminals labeled 1 through 6 around the cap, with an arrow showing rotor rotation direction). Lines drawn between the cylinders and the distributor cap terminals show the correct spark plug wire routing. On the left side, an inset shows the timing pointer and harmonic balancer timing scale, marked from 14° BTDC down through 10°, 8°, 6°, 4°, 2°, and 0° to ATDC, with the front of the engine indicated. From this document a reader can determine how to correctly route the spark plug wires from the distributor cap to each cylinder and locate the ignition timing marks on the front of the engine. The image carries a 'Steve83' watermark but no explicit year, model, or part number information.