Vacuum Leak Survey - 8th Generation Honda Civic Forum
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Old 09-27-2018, 02:09 AM   #1 (permalink)
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liketotallyrandom2008 has their car in neutral right now
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Vacuum Leak Survey

If you have had a vacuum leak, where was it and how did you find it?

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Old 09-27-2018, 05:34 PM   #2 (permalink)
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Spraying carb cleaner or starter fluid in suspected areas will make it rev up when you find one.

Most common areas are around intake manifold, throttle body, or brake booster fittings.

Why do you think you have one?

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Old 09-29-2018, 08:51 AM   #3 (permalink)
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Yeah. I get hesitation, but only during medium throttle. I'm trying to figure out whether it is a vacuum leak or the Throttle Position Sensor, which seem to be the best candidates so far.

How do I spray carb cleaner while I'm driving the car? It doesn't hesitate at idle or if the car is not under load.
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Old 10-03-2018, 10:17 AM   #4 (permalink)
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Quote:
Originally Posted by liketotallyrandom2008 View Post
Yeah. I get hesitation, but only during medium throttle. I'm trying to figure out whether it is a vacuum leak or the Throttle Position Sensor, which seem to be the best candidates so far.

How do I spray carb cleaner while I'm driving the car? It doesn't hesitate at idle or if the car is not under load.
Obviously you don't check for a leak while driving. This does not mean there is not a leak while at idle. so you check at idle and if you don't find anything you move on to TPS or Mass air sensor. I assume the check engine light is off?
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