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1972 Ford Thunderbird 460 Engine backfires and stalls.

Tiny
MARVIN WELSHER
  • MEMBER
  • 1972 FORD THUNDERBIRD
  • V8
  • 2WD
  • AUTOMATIC
  • 79,000 MILES
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!
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Thursday, June 18th, 2009 AT 6:43 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have full manifold or ported vacuum to the vacuum advance?
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Thursday, June 18th, 2009 AT 6:49 PM
Tiny
MARVIN WELSHER
  • MEMBER
  • 3 POSTS
I have ported.
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Thursday, June 18th, 2009 AT 10:56 PM

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