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    Thread: Vacuum Leak?

    1. #1
      What's wrong with my car?
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      Vacuum Leak?

      2006 Aveo manual transmission 75,000 miles

      I have been fighting a vacuum leak for a while. Check engine light is on steady. It flashes from time to time. When accelerating I have to be light on the gas pedal. If I give it too much gas, it stutters and misfires. If I am light on the gas it seems to not act up as much. It does this under load, what I mean is that if it is idleing, and I depress the gas pedal, revving the engine, it doesn't happen. If I am getting onto the interstate, and I need to accelerate, I can not "floor it" as it will buck violently. Getting on the interstate has to be a gradual, slowly accelerating entrance.

      Pulled the code. I forget what the code number was, but it said random misfire and also said vacuum leak.

      I have tried the brake cleaner spray vacuum leak test with no results..... I have 75,000 miles and have never replace the plug or wires....

      any thoughts?



    2. #2
      Almost time to do my timing belt daug1502's Avatar
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      Tony_B, mind if I ask what the B stands for?

      I don't know any other tricks for finding vacuum leaks, short of pulling and plugging lines, not something I would want to fight with.

      Welcome to the forum.
      http://www.aveoforum.com/phpBB3/view...p?f=41&t=28184
      2008 Aveo5 SV

      I will think of a better signature later.

    3. #3
      What's wrong with my car?
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      B stands for my last name

      I found, while searching the net this:
      RANDOM MISFIRES

      It kinda says that vacuum leaks affect a car at idle more than at partial or full throttle. I guess I should be headed toward a fuel injector problem.

      Any thoughts?

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      Administrator MetroMPG's Avatar
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      One thought: does it do it in all weather?

      If it's more in damp conditions it would point more to being an ignition wire problem. That might trigger the random misfire code. I had an Accord that behaved exactly as you describe in damp cold weather. You could test that theory by spraying (soaking) the ignition parts & wires with WD-40 after you experience the symptoms, then drive it again. New wires fixed me right up.

      But if the computer says you have a vacuum problem (via the code), then you probably do.

    5. #5
      What's wrong with my car?
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      Replaced plugs and wires.....

      ALL BETTER!

      I guess the vacuum leak code was unrelated

    6. #6
      Almost time to do my timing belt daug1502's Avatar
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      Quote Originally Posted by Tony_B View Post
      B stands for my last name
      lol. Let me change my question, do you own or have you ever had a honda prelude?
      http://www.aveoforum.com/phpBB3/view...p?f=41&t=28184
      2008 Aveo5 SV

      I will think of a better signature later.

    7. #7
      What's wrong with my car?
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      Quote Originally Posted by Tony_B View Post
      2006 Aveo manual transmission 75,000 miles

      I have been fighting a vacuum leak for a while. Check engine light is on steady. It flashes from time to time. When accelerating I have to be light on the gas pedal. If I give it too much gas, it stutters and misfires. If I am light on the gas it seems to not act up as much. It does this under load, what I mean is that if it is idleing, and I depress the gas pedal, revving the engine, it doesn't happen. If I am getting onto the interstate, and I need to accelerate, I can not "floor it" as it will buck violently. Getting on the interstate has to be a gradual, slowly accelerating entrance.

      Pulled the code. I forget what the code number was, but it said random misfire and also said vacuum leak.

      I have tried the brake cleaner spray vacuum leak test with no results..... I have 75,000 miles and have never replace the plug or wires....

      any thoughts?
      I have a 2008 aveo LS manual trans and its doing the exact same thing. You ever figure this out? I'm leaning towards a restricted exhaust at this point.





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