Can't figure it out

Asked by Apr 19, 2018 at 07:24 PM about the 1972 Ford F-100

Question type: Maintenance & Repair

Is the vacuum for the motor apart of the master
break cylinder?  Runs rough with new tune up and
carb.  Ran rough before but thought a tune up
would help it.  A guy told me it was a vacuum
issue.  But can't find a leak.  

1 Answer


The engine generates a vacuum when it is running. There will be vacuum lines coming from the intake manifold. If one is loose or cracked you will have a leak which can make the engine run poorly.

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