vacuum issue! i think?
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Joined: Oct 2011
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vacuum issue! i think?
i have a 1982 f-100 with the 4.9 300. i just got done replacing head gasket and now my truck runs roughwile in a drive gear really rough when in park its not as bad... i think is a vacuum issue cuz when rpms go up the motor smooths out but at idle its a mess,. i thought i marked all my vacuum lines correctly b4 i removed the 1 brrl carb but i may have crossed a few and my vacumm diagram dose not seam to match. if anyone has pics of how the lines should be routed on my carb i would be gratefull if u could share them with me!! or any other info thx!!
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Joined: Oct 2010
Posts: 1,199
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From: Missouri
You could have some mis-matched vacuum lines or just a vacuum leak (or both). There are many different configurations, so probably the best thing would be for you to post a picture and some knowledgable people here can see if they notice anything wrong.
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zonker
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
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Jun 25, 2017 05:20 AM
