1984 FORD F150 ADJUSTABLE VACUUM ADVANCE

  • Tiny
  • agfordman
  • 1984 Ford F-150

Engine Mechanical problem
1984 Ford F150 V8 Four Wheel Drive Automatic 100000 miles

how do I find the right area to set my adjustable vacuum advance to? Also what should my timing be set at, I have it set at 8 degress? My set up is a ford 302, with a edelbrock performer intake, a holley 390 cfm carb and a duraspark 2 ignition system

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Wednesday, October 15th, 2008 AT 6:27 PM

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  • Tiny
  • Docfixit
  • Expert
  • 18,991 posts

You mean where to place vac hose? If so on carb find ported nipple ie. No vac at idle vac as throttle opens. You mean 8 BTDC or 8ATDC if no trouble starting go for 8ATDC. Adjust vac advance to full advance at 1800roms.

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Wednesday, October 15th, 2008 AT 6:36 PM
  • Tiny
  • agfordman
  • Member

No I should have been more clear, Inside my vacuum advance canister on the distributor, there is a adjustment that you can do to make the vacuum advance come on later, or as soon as the vacuum is applied to it. It is a small allenwrench that fits inside of the inlet for the vacuum line.

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Wednesday, October 15th, 2008 AT 7:48 PM
  • Tiny
  • Docfixit
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  • 18,991 posts

You want full advance no sooner than 1800rpms.
I would want adv to come on as soon as possible

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Thursday, October 16th, 2008 AT 3:16 PM

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