1972 Ford Thunderbird 460 Engine backfires and stalls.

1972 FORD THUNDERBIRD
79,000 MILES • V8 • 2WD • AUTOMATIC
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MARVIN WELSHER
  • MEMBER
  • 3 POSTS
When I hook up the vacuum advance the engine pops & backfires mississ out. When I Pull the vacuum off the engine stops missing and backfireing but stell runs bad. I have replace timing chain, distributor ,new msd & coil., New plugs and wires. The car will not run with the vacuum advance hooked up. HELP!!!
Jun 18, 2009 at 11:43 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Do you have full manifold or ported vacuum to the vacuum advance?
Jun 18, 2009 at 11:49 AM
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MARVIN WELSHER
  • MEMBER
  • 3 POSTS
I have ported.
Jun 18, 2009 at 3:56 PM
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