here's what i've heard over the years:
Push in on advance lever with engine at idle. If engine stumbles/fishbites it's set properly. If engine just slows a bit then it's too far advanced, if engine shakes or quites it's too far retarded.
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2003 S-10, 2.2L, 5 speed, ext cab long bed.
So far: DRL delete, remove bed mount toolbox.
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