cam timing will not change ignition timing i would try 8 or 10 degees advance at idle with the vacuum advance disconnected.
That requires an OBDII engine scanner to do that. The ignition timing is controlled by the computor. If you have not moved are removed the distributor then there's no reason to fool with the timing.
If you have the 3.8L engine, ignition timing is controlled by the computer and cannot be altered without making changes to the computer. If you have the 3.1L engine, which has a distributor, you can set the timing as you would on any engine with a distributor.
Its the brown wire from the distributor, goes to the fuses/relays on your firewall. unhook that and you will have your base timing.
1.8.4.3.6.5.7.2 standard Chevy timing/firing order. the #1 on the distributor will be pointing @ the #1 cyl when @ top dead center.( front drivers side.
The 1987 Chevy Celebrity has distributor less ignition. The timing is controlled by the engine control module and there is no provision for adjustment.
If the distributor has not been moved the timing will be as it was before.
what is the ignition timing for a 1988 Chevy 454 engine
You must have an engine scanner to set the timing correctly.
It does not have one. The timing is controlled by the computer. You must have a OBDII engine scanner to adjust the timing. If you did not have the distributor out are move it then there is no reason to adjust the timing. It is done automatically by the computer.
It should be 6 degrees before tdc, just make sure you disconnect the distributor's computer control wiring harness before you adjust, and check the timing with a timing gun.
The ignition module is located in the distributor, under the distributor cap.
That is automatically controlled by the ECM. Yes that is true, but if you have removed are moved the distributor then it requires an engine scanner to set the timing. and then the computer will take over from there.