Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Pontiac 400 Idles to fast
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Old 04-02-2010, 02:26 PM
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beertracker beertracker is offline
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I am using the two stock return springs that came with the car. I applied hand pressure to the throttle to slow the engine down but it didn't slow down.

I will look for a vacuum leak next. Last Fall the engine always idled around 1000 rpm and I never fixed it. This Spring I had the carburetor off and after I replaced the carburetor I noticed the engine idling at 1500-2000 rpm. So this may be related to vacuum leak. I haven't check the vacuum advance or taken the car for a test drive. It is a automatic trans. The car has power brakes so how can I tell if the booster is leaking? Just do a brake check and see if power brakes work? The booster is original to the car 1970.

Thanks for the ideas.

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