.054
Spark plug order? there is no such thing.
Your intake manifold probably has a crack in the water jacket.
According to one of Fords websites : For a 1969 Mercury Cougar ( all factory available engine sizes ) ( .035 inch spark plug gap )
The 1997 model Mercury, 225 hp EFI uses a NGK BR8HS plug, gapped to .035 in.
You can find the correct firing order for your 1987 mercury cougar at www.coolcats.com, it is a website dedicated to the cougar and thunderbird.
0.054 for 1999 to 2001 V6.
According to one of Fords websites : For the 1992 Mercury Cougar , 3.8 liter V6 engine : ( the spark plugs are gapped at .054 inch )
According to one of the Ford websites : For a 1988 Mercury Cougar , 3.8 liter V6 engine : ( the spark plugs are gapped at .054 inch )
The Spark plug location on the 2001 2.5 liter dohc is under the valve cover.
what is the spark plugs firing order for a mercury villager 1997
In the glove box.
According to one of Fords websites : For the 3.8 liter V6 engine in a 1988 Mercury Cougar : ( the spark plugs are gapped at .054 inch )