Quote:
Originally Posted by didderson
It's normal for my engine to create more vacuum when I let the throttle off at a higher rpm than at idle.
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Actually, if the motor
doesn't produce more vacuum on decel than at idle, you've got a leak that's only presenting 'at pressure' (like a crack in a hose, etc).
There's no "engine problem" I can think of that will produce extra vacuum... only problems that will produce less.