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09-21-2007, 02:43 PM
I Want To Know If Anyone Knows What The Ignition Timing Should Be Set At Also What The Rpm Should Be Set At, 1991 S-10 4.3 Engine:)

09-21-2007, 07:56 PM
With the EST (Electronic Spark Timing) wire disconnected, (located under the dash behind the carpet above passengers feet, brown single wire) timing should be 10 degrees BTDC (Before Top Dead Center). Idle should be around 650 RPM in drive. Should be a white sticker under the hood with the specs on it.

09-22-2007, 10:28 PM
Although idle can technically be adjusted on this, there really shouldn't be any idle adjustment needed. As for the timing, old_master, I'll correct ya, as I hope you do same for me, but its at "0" with the EST disconnected.

09-22-2007, 10:33 PM
I stand corrected. Good call, thanks!

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