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SVTPerformance's Chain of Restaurants
Road Side Pub
Summer hot days and driving
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<blockquote data-quote="SecondhandSnake" data-source="post: 16795356" data-attributes="member: 116684"><p>What's the fuel system configured like? Including the gas cap and evap system. </p><p></p><p>Most newer OEM fuel caps are designed to relieve both positive and negative pressure beyond a certain threshold. If it's getting that much pressure it should be venting on its own. Otherwise it has to rely on the vent in the evap system, where hopefully your canister isn't plugged, and your vent valve (or any other valves the system utilizes) aren't stuck.</p><p></p><p>And as far as building that kind of pressure, the main mechanism (that you have control over) is going to be heat. Unless you've got your exhaust really close and right in front of it, the main source is going to be return fuel. Might be worth a look at where that could be getting heated, or installing a fuel cooler. High fuel temps will lead to not only lots of evaporation and pressure in the tank but can also cause cavitation issues in the fuel pumps and loss of fuel pressure as well. </p><p></p><p>The old foxes actually did have a drain hose from the filler neck area down to the back bumper.</p></blockquote><p></p>
[QUOTE="SecondhandSnake, post: 16795356, member: 116684"] What's the fuel system configured like? Including the gas cap and evap system. Most newer OEM fuel caps are designed to relieve both positive and negative pressure beyond a certain threshold. If it's getting that much pressure it should be venting on its own. Otherwise it has to rely on the vent in the evap system, where hopefully your canister isn't plugged, and your vent valve (or any other valves the system utilizes) aren't stuck. And as far as building that kind of pressure, the main mechanism (that you have control over) is going to be heat. Unless you've got your exhaust really close and right in front of it, the main source is going to be return fuel. Might be worth a look at where that could be getting heated, or installing a fuel cooler. High fuel temps will lead to not only lots of evaporation and pressure in the tank but can also cause cavitation issues in the fuel pumps and loss of fuel pressure as well. The old foxes actually did have a drain hose from the filler neck area down to the back bumper. [/QUOTE]
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SVTPerformance's Chain of Restaurants
Road Side Pub
Summer hot days and driving
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