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.41 is the gap specified by the Haynes manual for the 1990 Geo Prizm.
look on the under side of the hood or in front of the radiator usually tells you your information like gap and timing.
.43 gap
The correct gap is .44
My 92 model Geo spark Plug gap is 0.39 thousands of an inch. One Liter 3cyl/5sp. Plug is a ngk BPR6ES-11 Hope this helps
The spark plug gap for a 1995 Geo Prism Isi 1.6 liter should be set at .032 inches. A spark plug for this vehicle will be preset at the factory and should not need further adjusting.
According to the Haynes Manual- 0.031 inch gap
0.028 geo tracker 1990, 8 valves 2 doors
1-3-4-2 Distributor rotates counterclockwise.
Factory manual says 0.031, not 0.042.
ANSWER: 0.039 to 0.045 inch (1.0 to 1.1 mm)
look at sticker under hood. i believe it is .39 i have a 4 cyl 1996