Vapor lock?
Thread Starter
Intermediate
Joined: Sep 2004
Posts: 40
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Vapor lock?
Hey everyone-
Just last week I got gas and when the cap came off, it sucked in air like you wouldn't believe. Air bubbles could be felt coming up from somewhere. I am assuming this is what is normally refered to as vapor lock. Any ideas on what to look into? It's a 78'. Thanks in advance...
Just last week I got gas and when the cap came off, it sucked in air like you wouldn't believe. Air bubbles could be felt coming up from somewhere. I am assuming this is what is normally refered to as vapor lock. Any ideas on what to look into? It's a 78'. Thanks in advance...
Safety Car
Joined: Jul 2002
Posts: 4,269
Likes: 3
From: St. Charles IL
Cruise-In 5-6-7-8-9-11-12 Veteran
A CI-6 Car Show Winner
That is not a vapor lock. It is a problem, possibly with your charcoal cannister or the line going to it is plugged. The cannister allows the gas tank to vent because the cap is sealed.
Le Mans Master
Joined: Jul 1999
Posts: 9,206
Likes: 17
From: Sewell NJ
Originally Posted by Big Fish
That is not a vapor lock. It is a problem, possibly with your charcoal cannister or the line going to it is plugged. The cannister allows the gas tank to vent because the cap is sealed.
Make sure that you have the correct cap. I believe a sealed cap is used and the tank is vented through the charcoal canister. If the canister lines are plugged you can create enough vacuum to collapse the fuel tank. If your EVAP system is really screwed up you could probably go with a vented cap or drill a small hole in your current cap to relieve the pressure.
