.34 - .37 is optimal any more than that you'll have to replace them more often.
.034
Look [http://autorepair.about.com/od/enginefiringorders1/Engine_Firing_Orders.htm Here for your Answer]
Check under the hood, behind the Brake Master cylinder. There is an Vehicle Emmission Control information label or decal that has this information on it
Do you need a new spark plug??
The recommended spark plug gap for a 1987 Volvo (all models) is .028"
A Jeep Wrangler has one spark plug per cylinder.
The spark plug gap for the 1994 Jeep Grand Cherokee 5.2L (318CID V8 is .035".
what is the spark plug gap size for a 1987 suzuki savage 650?
wt is the spark plug gap for a 1987 kawasaki jet ski?
under the ignition coils, there are one coil for each spark plug.
1991 Jeep Cherokee 2WD 4.0L MFI 6cylThe Spark Plug Gap.035 (In thousandths of an inch)
1998 Jeep Cherokee 2WD 4.0L MFI 6cylThe Spark Plug Gap.035 (In thousandths of an inch)