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Common Vacuum Leaks

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Old 08-22-2009, 01:27 AM   #1
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Question Common Vacuum Leaks

My 95 seems to have a vacuum leak somewhere. I just can't seem to find it at all. I have tried spraying carb. cleaner to find it but I haven't had any luck. It's really bugging me. What are some common places for a 95 to have a leak?


My truck seems to switch from a/c to defrost when I accelerate hard and when I'm in a lower gear it seems to vibrate (feels like its towards the rear). Any help would be great. Thanks
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Old 08-22-2009, 06:37 PM   #2
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Check all the intake hoses, intake gaskets, brake booster hoses, PCV hoses/valve, EGR hoses, etc. If you can't find the leak take it to a shop with a smoke tester.
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Old 08-23-2009, 12:31 AM   #3
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Thanks! I know that there could be so many things that it could be exactly. Is it possible to be something internally?
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Old 08-23-2009, 10:33 PM   #4
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all the hoses that seem cracked and old just replace them...it might just be a **** ton of small pinholes all over..
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Old 08-23-2009, 10:52 PM   #5
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Did you check to see if your brake booster is leaking?
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Old 08-24-2009, 06:11 AM   #6
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Check the vaccuum lines under the battery or where it goes thru the firewall. Lines either rott out or crack at those places.
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