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1997 Cadillac Deville 4.6L SFI DOHC 8cylThe Spark Plug Gap.050 (In thousandths of an inch)
mixed spark plug wires
0.050
SPARK PLUG GAP2003 Cadillac Deville 4.6L SFI DOHC 8cylThe Spark Plug Gap.050 (In thousandths of an inch) Caution! Gap is not adjustable on certain plug brands
0.60 gap
Get a tune up. Replace cap and rotor, spark plugs, spark plug wires, and make sure the wires are in the correct firing order.