Thanks Brian, I bought a stock plug K16R–U11, the same one that was in the truck when I bought it brand new. Read this:
Recommended spark plug:
DENSO made K16R–U11
NGK made BKR5EYA–U
(e) Adjust the electrod gap.
Carefully bend the outer electrode to obtain the correct
electrode gap.
Correct electrode gap: 0.8 mm (0.031 in.)
(f) Using a 16 mm plug wrench, reinstall the 4 spark plug.
AND THIS:
SS–30
SERVICE SPECIFICATIONS – IGNITION (2RZ–FE, 3RZ–FE)
Author: Date: 198
2003 TOYOTA TACOMA (RM1002U)
IGNITION (2RZ–FE, 3RZ–FE)
SERVICE DATA
Spark plug Recommended spark plug DENSO made
Recommended spark plug NGK made
Correct electrode gap
K16R–U11
BKR5EYA–U
1.1 mm (0.043 in.)
Camshaft
position
sensor
Resistance at cold
at hot
835 – 1,400 W
1,060 – 1,645 W
Crankshaft
position
sensor
Resistance at cold NE+ – NE–
at hot NE+ – NE–
1,630 – 2,740 W
2,065 – 3,225 W
The above texts are both out of the 2003 service manual!
Mike