Thread: '91 4.2 liter timing ??
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Old 03-31-2013, 12:33 PM
Frank Reiner Frank Reiner is offline
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Join Date: Feb 2011
Location: Modesto CA
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For reference:

Timing at:
Cranking and idle - w/o vacuum 3-7 BTDC, w/vac. 10-14 BTDC
@ 3500 RPM - w/o vac. 28-32 BTDC, w/vac. 41-45 BTDC
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