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How do you adjust the timing on a 1993 Geo Metro hatchback with the three cylinder engine?


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Wiki User
2015-07-15 21:17:07
2015-07-15 21:17:07

This requires a timing light

You're supposed to put a jumper wire between the ground terminal and the test switch terminal of the diagnostic connector plug before adjusting the timing. The connector plug is on the firewall under the hood, next to the coil. If you look at the socket straight on with the plastic catch on the left, ground is the lower right hole, test switch is right above it. Then hook up the timing light.

The distributor is held in place by two bolts in adjustment slots. Rotate the distributor clockwise to retard timing, counterclockwise to advance timing.


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Yes , it has a timing belt and it is not an interference engine

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Distributor timing is adjusted by rotating the distributor. A scan tool is required to put the engine computer in distributor sync mode. The distributor is then set to zero degrees.

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Timing marks are normally on the harmonic balancer if your engine has one. If your engine is internally balanced, the timing marks will be on the timing chain/belt gears.

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