What is the spark advance supposed to be in idle for s-10 blazer?

04-08-2010, 08:13 PM
My husband is trying to figure out what the spark advance is supposed to be when it is in idle. Our blazer takes a long time to get up to speed and having some other issues and the spark advance in idle is running at 21. I guess this is also called timing advance. I am not sure.

04-08-2010, 09:06 PM
What year and what engine?

04-08-2010, 09:10 PM
It is a 98 with a 97 crate motor. 4.3l

04-08-2010, 09:48 PM
The distributor housing is keyed, meaning it can only be installed in one position and is not adjustable. Ignition timing is controlled by the ECM.

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