68Newport512
New Member
Anyone cure the vapor lock issue with today's gas?
That's not "vapor lock".Any tips on how to prevent it? After driving for awhile on hot days I get hesitation.
Yes and no. Ethanol laced gas does have a lower boiling point, but really the cause is from something making the fuel lines/carb too hot. It just happens a little easier.Vapor lock isn't a byproduct of "today's gas."
I did notice if I put in 87 octane the engine will die and won't start back until 30 minutes or so.
93 octane it wont die just hesitate when accelerating.
Thanks. I'll pick some up tomorrow. That's my main problem. It doesn't move freely and difinetly wont return back to normal.Here is a link to the solvent that is recommended. I picked up a can today from the local Dodge dealer.
What did you do to your C-body today....
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Thank you! The heat manifold valve is the start of my problem.A couple of easy things to check. To take the vapor lock question out of the picture, but @Big_John is most likely on the right track.
If you want to minimize vapor lock potential here are some easy things to check.
First, is your Heat Manifold Valve on your right exhaust manifold opening up all the way? If stuck shut, or only opening part way it will heat up your intake manifold enough to vaporize the fuel in your carburetor. Second, Is your fuel line from the pump to the carb laying on the water pump or intake. The heat from your engine can vaporize some of the fuel in the line. line should not be touching engine.
Third, does the top of the fuel bowl have a little vent cap or flap that allows the bowl to vent when shut off or idling? Check those simple items first.
But if it is running and hesitating, start with Big_johns direction.
Heat Manifold valve
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Fuel line
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Carb vent
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Thank you! The heat manifold valve is the start of my problem.