On the inline six cylinder engine , spark plug # 6 is the rear spark plug On the V6 engine , spark plug # 6 is the rear plug on the drivers side of the engine On the V8 engines , spark plug # 6 is the 2nd plug from the front on the drivers side of the engine
www.motorcraft.com shows the 1994 F150 4.9 L ( 300 cubic inch ) straight six spark plug gap as .044 inch
( .044 inch ) - for the 4.9 L ( 300 cubic inch ) straight 6 cylinder engine in a 1989 Ford truck
.044 inch according to www.motorcraft.com for the 4.9 L ( 300 cubic inch ) straight 6
www.motorcraft.com shows the 1994 F150 4.9 L ( 300 cubic inch ) straight six spark plug gap as .044 inch
Check the Vehicle Emission Control Information ( VECI ) decal located in the front of the engine compartment ( it will show what type of spark plugs to use and the spark plug gap )
1 - 3 - 7 - 2 - 6 - 5 - 4 - 8
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
Up your but
take a 7mm flex socketa and a 6" extension take the bolt holding the ignition coil. and you will see the spark plug in the hole.
On a 1992 F150 , with the 300 cubic inch ( 4.9 L ) straight six cylinder engine , the spark plug gap is .044 inch ( also spark plug firing order is 1 - 5 - 3 - 6 - 2 - 4 and the distributor rotates CLOCKWISE )
.044 inch , according to fordparts.com