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Adjusting the Timing On Fuel Injected 1982 - 1992 F-Bodies Things you will need: You MUST definitely use a timing light to adjust your timing correctly.
You could put a vacuum gage on the engine and time it for peak vacuum. A timing light is still better.
That requires a OBDII engine scanner. You can not use a timing light. The timing is computer controlled.
To adjust the timing on a 1992 Chevy 305, first ensure the engine is at operating temperature. Locate the timing mark on the harmonic balancer and the timing tab on the engine block. Use a timing light to check the current timing by connecting the light to the number one spark plug wire and pointing it at the timing mark. To adjust, loosen the distributor hold-down bolt and rotate the distributor slightly until you reach the desired timing, then retighten the bolt.
On the older ones you can use a timing light. Newer ones do not have that option. You need to give more info for anyone to help you. What year, make, model?
You can not use a timing light to set the timing on that year engine. The ignition timing is COMPUTER CONTROLLED. If you have not fooled with the distributor then there is no reason to adjust it. But if you have bother it then you will need an oBDII engine scanner to put the timing back to factory specs.
It's a tool that helps you adjust the timing of your engine.
To time your 1989 Chevy pickup, start by warming up the engine to its normal operating temperature. Locate the timing marks on the harmonic balancer and the timing tab on the engine block. Use a timing light to check the timing by connecting the light's clamp to the number one spark plug wire and aiming the light at the timing marks. Adjust the distributor as needed to align the marks with the specified timing degree, which is typically around 0° to 12° BTDC, depending on the engine model.
you need to disconnect the electronic advance plug on the side of distributor and aim the timing light on the pointer and move distrbutor until the nuber is right,usually 4 or 8 degrees
The timing doesn't change during normal operation. If you want to know what it is, check it with a timing light per the manufacturer's instructions. It would usually only need to be adjusted if it's been disturbed.
you turn the distributor and use a timing light
Connect a timing light, loosen the bolt on the distributor and turn it. If you have a model that is contolled by the EMM, you can only adjust the clearance of the cam and crank positions sensors. The rest is controlled by the computer and is determined by the software. Note that adjusting the sensors only improves the input to the EMM and does not control the timing.