vacuum issue

1989 DODGE DAKOTA
200,000 MILES • 6 CYL • 2WD • AUTOMATIC
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STANWAY
  • MEMBER
  • 1 POST
vacuum changes heater doors under accelatation
Jun 29, 2011 at 1:27 PM
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WRENCHTECH
  • ✓ASE Certified Mechanic
  • 20,761 POSTS
  • ASE Certified Mechanic
Find the vacuum leak. Look under the hood for a small black plastic hose coming through the firewall. Follow it to the vacuum source looking for any breaks, cracks or leaks. Also follow any other lines that branch off because they may go to a vacuum reservoir (storage tank) and a leak there will cause the same problem. Using a vacuum gauge to determine if you have full vacuum at any given point is the best way to find it. You can cut into the line anywhere and splice it back together with a piece of vacuum hose. Find the broken line, you found your problem.
Jun 29, 2011 at 1:36 PM
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