I have a 67 427/400HP with power Glide tranny, I have the idle set at ~725-750 RPMs. Cold she runs perfect, starts right up and idles perfect until she gets warm, once warm the idle seems to stick at ~1100 and when it does decide to come back down to normal idle it wants to stall. If I keep my foot on the pedal she will stay running. The car still has points and I've checked the gap and they seem correct, I'm wondering if this my be a vacuum problem. Any suggestions I would be grateful, or if any one knows someone in Jacksonville fl. who can take a look I can use the help. Thanks for reading.
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Re: 67 BB carb problems need some advice
no carb experts out there? Why does the car run different when it gets warmed up? -
Re: 67 BB carb problems need some advice
Sounds like you have set your idle speed while the choke is still on. You will probably need to bring the hot idle speed to specs.Dick WhittingtonComment
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Re: 67 BB carb problems need some advice
Check for manifold vacuum leaks. Had a similiar problem and found the intake leaked upon heating up. I had painted the gasket surfaces prior to assy and the paint soften causing a leak. When the choke was on OR the rpm's were high enough the "leak" was overcome by throttle position air volume.
To test this just squirt a small amount of water along the manifold gasket with the engine running and see if there is a temporary change in RPM.....
If you have a vacuum gauge you should see an increase in vacuum if the water check works (while the water is present)Comment
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