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Could someone please help how to set Ignition timing on 93 Mazda 929 3.0?
Wiki User
∙ 13y ago
You need to set the base timing. That means you ground the No. 10 terminal in the diagnostic port to the ground terminal in the same port. The diagnostic port is just inside the driver's side fenderwell and has a plastic cover that will tilt up towards the engine with a squeeze and a pull. Usually you can see "DIAGNOSIS" imprinted right on the top.
The number ten terminal is the second terminal in from the right side on the top row (standing on the driver's side facing the engine; there are two sets of two) and the ground terminal is the leftmost in the second row down. A paper clip will do fine for this purpose.
Then, using a regular old-school timing light, check for your mark (a tiny line cut into the edge of the crank pulley) to be between 11 and 13 degrees BTDC (to the left of the "10" imprinted on the grey plastic timing best cover). If it isn't, loosen the adjusting bolt on the top of the distributor set the timing by rotating the distributor (to the right moves the mark to the right in vice-versa).
When you remove the jumper, the engine will find it's own timing on signals from the distributor and from the Crankshaft Position Sensor behind the crank pulley to the ECM.
Rob @ HMAutomotive - Carson City
Wiki User
∙ 13y ago
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