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Help with 1990 Ford F-150 vacuum issues
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<blockquote data-quote="NightShade" data-source="post: 3306603" data-attributes="member: 29706"><p>Check the coffee can under the hood. Yep, coffee can. It's pained black, you can't miss it. It's the "vacuum reservoir" they develop holes over time in the bottom. You won't see them and will probably miss it. </p><p></p><p>Also if it's running rough just plug the main vacuum line and see if it runs better with it plugged, the idle should drop down a bit as well.</p><p></p><p>And remember there is a vacuum line that runs all the way to the fuel tank it's probably plastic with a rubber hose near the end.</p></blockquote><p></p>
[QUOTE="NightShade, post: 3306603, member: 29706"] Check the coffee can under the hood. Yep, coffee can. It's pained black, you can't miss it. It's the "vacuum reservoir" they develop holes over time in the bottom. You won't see them and will probably miss it. Also if it's running rough just plug the main vacuum line and see if it runs better with it plugged, the idle should drop down a bit as well. And remember there is a vacuum line that runs all the way to the fuel tank it's probably plastic with a rubber hose near the end. [/QUOTE]
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