The spark plug gap for a 1988 Ford Mustang is: .044" for the 2.3L 4-cylinder engine .054" for the 5.0L V8 engine
.054 inch
On my ( 1991 ) Ford Mustang 5.0 liter the spark plug gap was ( .054 inch ) What year of Ford Mustang ?
The 1966 Ford Mustang 200 cubic inch straight six spark plug gap is .032 to .036 inch
.054
Per my ford dealer service dept. .54 is best overall gap.
.054
According to motorcraft . com the spark plug gap for a 1993 Ford Mustang 5.0 L - V8 is : ( .054 inch )
( .050 inch ) - spark plug gap for 1986 Ford Mustang - 5.0 liter engine
.044 inch spark plug gap for the 2.3 L - 4 cylinder engine in a 1993 Ford Mustang
.050 inch spark plug gap - 1986 Ford Mustang 5.0 L ( 302 )
For the Ford Mustang , 200 cubic inch inline six cylinder engine : ( .032 to .036 inch spark plug gap ) ( in the 1960's )
According to www . ford parts . com ( no spaces ) The spark plug gap for the 2.3 liter four cylinder engine in a 1992 Ford Mustang is ( .044 inch )