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Old 06-12-2014, 01:00 AM
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Quick question.

Can a engine code scanner/auto scanner tool or whatever you want to call it detect any vacuum hose leaks? This might sound like a really stupid question to some of you but I am curious. I asked the mechanic if he could check my car for any vacuum hose leaks since I had it in the shop anyway replacing some bushings and the RPM idle had acted odd once or twice in the past and he said he could check using the engine code scanner which I found odd.
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Old 06-12-2014, 02:21 AM
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Re: Quick question.

There are some symptoms caused by vacuum leaks, but there's no code that pops out and says, "vacuum leak here." The fault codes just narrow down what you have to look for. Grab a shop manual, flip to the appropriate section (usually the fuel system section is a good place to start), and find out which troubleshooting lists your fault code points to. Then work down the list. Or look for symptoms on the chart (rough idle, etc) and look at the associated troubleshooting lists to see if a vacuum leak could be the cause, and check it. No magic, just a lot of detail work.
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Old 06-12-2014, 02:22 AM
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Re: Quick question.

The code scanner is for when your ecus throwing codes; if it is indeed something to do with any sensor related to any possible vacuum hose leaks then yes it might help, no codes then its something mechanical, so that leaves the rest!
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Old 06-12-2014, 06:16 PM
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Re: Quick question.

Quote:
Originally Posted by Daniel_Prelude View Post
Can a engine code scanner/auto scanner tool or whatever you want to call it detect any vacuum hose leaks? This might sound like a really stupid question to some of you but I am curious. I asked the mechanic if he could check my car for any vacuum hose leaks since I had it in the shop anyway replacing some bushings and the RPM idle had acted odd once or twice in the past and he said he could check using the engine code scanner which I found odd.
Uhhhh... Go low tech. While the car is running, pop the hood and spray spray starter fluid in a can lightly over the engine bay. If the car accelerates, you have a leak. Then localize the leak by spraying where the car accerates more. If this has been said already my bad peeps, just dislike when people fall back on a "scanner" for just about anything, even mechanics. Its a scare tactic most of the time.

Download the PDF manual to properly diagnose your car's problem
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Old 06-25-2014, 10:21 PM
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Re: Quick question.

We actually had a really cool machine in the shop that we used to detect vacuum leaks. It's essentially a fog machine but you took the vacuum like off the booster, got the right size adapter, plugged it in and it pumped the fog through your whole manifold and of course vacuum lines...anywhere you saw fog coming out that's where your leak was.
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