Check the spark plug and the wire on the 8th spark cylinder. Corosion, short, or just bad.
( .054 inch ) according to www.motorcraft.com
passenger side of engine , front cylinder
You cannot convert any 6-cyl engine to a V8, you can only swap them
The spark plug firing order for the 4.2 L V6 engine is ( 1 - 4 - 2 - 5 - 3 - 6 )
( .044 inch ) - for the 4.9 L ( 300 cubic inch ) straight 6 cylinder engine in a 1989 Ford truck
www.motorcraft.com shows (.044 inch ) plug gap on the 1989 F150 300 cubic inch ( 4.9 L ) straight 6 cylinder engine
no spark from the coil, or the icm, or plugs are shot or plug wires, no fuel,no shark no start
www.motorcraft.com shows the 1994 F150 4.9 L ( 300 cubic inch ) straight six spark plug gap as .044 inch
sparkplug placement for 97 f150 4.6
www.motorcraft.com shows the 1994 F150 4.9 L ( 300 cubic inch ) straight six spark plug gap as .044 inch
have misfire on #5 on a ford f150 4.6. changed spark plug and coil pack and injector.