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Old 05-16-2016, 01:31 PM   #1
heine_ken
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Question Vacuum Opens Throttle Plate

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Last edited by heine_ken; 05-17-2016 at 10:19 AM. Reason: del
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Old 05-16-2016, 02:54 PM   #2
harleyguy
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Re: Vacuum Opens Throttle Plate

I have never heard of that happening. Have you put a vacum gauge on it? What is vacum at idle then in gear?
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Old 05-16-2016, 03:00 PM   #3
heine_ken
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Re: Vacuum Opens Throttle Plate

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Originally Posted by harleyguy View Post
I have never heard of that happening. Have you put a vacum gauge on it? What is vacum at idle then in gear?
No, i unfortunately i don't have access to a vacuum gauge, and can't drive the car to a shop obviously. When the car sits in neutral, the vacuum seems normal, and also somethimes when you put it in drive. But after a little while, or if you tap the gas lightly, it exponentially opens.

Well, the forward momentum of the car is exponentially, the valve just opens maybe a cm.
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Old 05-16-2016, 08:15 PM   #4
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Re: Vacuum Opens Throttle Plate

Sounds like you are missing or have a broken throttle return spring- the vacuum comes from the engine- it will run wide open unless the throttle is doing its job "throttling" So the throttle opens very easily means there is not much holding it closed- thus a broken or misplaced throttle return spring IMO.
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