According to one of Fords websites :
For a 1986 Ford Taurus :
( both the 2.5 liter four cylinder engine and the 3.0 liter six cylinder engine
have the spark plugs gapped at .044 inch )
Spark Plug Gaps, 1986-2005Referring to the Owners Manual or the decal on the radiator cover in the engine compartment, Ford seems to have settled on the following:2.5l 4 cyl, Vulcan 3.0l 12v and Flex Fuel engines: .042-.0463.8l and Duratec 24v DOHC engine: .052-.056See "Related Questions" below for moreAccording to Chiltons, the 1993 3.8 litre spark plug gap is .054
.054 inch - according to motorcraft.com ( one of Fords websites )
It is 0.044 ======================================================= According to one of Fords websites : The spark plug gap for the 4.0 liter V6 engine in a 1992 Ford Aerostar is ( .054 inch ) * the .044 inch spark plug gap is for the 3.0
0.80
The 2007 Ford Focus owners manual shows , for both the 2.0 L and 2.3 L : ( .051 inch +/- .002 ) or in metric ( 1.3 mm +/- .05 )
1mm
All spark plug gaps are adjustable.
spark plug FR7DC2 set gap 0.9mm
.044
spark plugs are either not put in right or gaps not right.Also check your spark plug wires.
.054 inch , according to fordparts.com
Trouble code P0305 means:Cylinder 5 misfire detected Try replacing the plug wires and double checking the spark plug gaps