In this video you'll find me checking the ignition timing on a 1988 Ford F150. Engine size is a 5.8 liter. Specification is 10 degrees. The state of California allows plus or minus 3 degrees. At the end I do show how to adjust the timing if needed. Should be the same for the 1988-1991 5.8 / 5.0 Windsor motors in the 8th generation Ford F-series trucks, Broncos, and more. Buy Timing light: https://ebay.to/2z2hMh4 This site contains affiliate links for which I may be compensated.