![]() ![]() ![]() I'd start by adding heat shielding/wrap to fuel lines or carb or rerouting the fuel lines if possible and perhaps use header tape to wrap any exhaust manifolds in fuel line areas to keep exhaust heat away from them. Get some of that pipe insulation at HD or Lowes that is the diameter of your fuel line and put it over the line anywhere its exposed (not near the muffler, obviously). The gas vaporizes in the injector causing a vapor lock. Most 'vapor-lock' issues are with the temperature of the air going past the fuel line. The constant acceleration and deceleration makes your engine work harder, causing it to run hotter than normal. Vapor lock is most likely to happen when driving on hot days and in stop-and-go traffic. Might be a bit of a hassle to modify your engine/fuel tank for that but that is an option as well. 58K subscribers Subscribe 31K views 5 years ago Simple tip for fixing bucking and. Vapor lock is rare in newer cars because of the modern fuel injection systems but is common in older carbureted cars. ![]() That filter setup was used on some RT 440 and Hemi models to avoid vapor lock issues… Mine got plenty hot under the hood in summer with AC on… The return line offered a path for vapor to bleed off to the tank. May 27, 2021August 9, 2021Sommerset If you have an older vehicle model, you have probably experienced vapor lock. I use to own a 69 Charger RT 440 with AC and they had a special fuel filter design with 3 fuel lines at the filter… One from the fuel pump, one from the filter to the carb and one return line from the filter to the fuel tank. Another thing to try is to install a thermal spacer plate between the carb and engine… Some are just made of a phenolic resin that mount in place of the carb base gasket and some have a metal heat shield incorporated into them to block engine heat getting to the carb fuel bowl. Or reroute the fuel lines if possible away from heat sources like exhaust manifolds. This will quickly cool down the fuel pump and condense the fuel. The wrapping will reduce any heat transfer from the engine to the fuel line and reduce the chances of vapor lock. Pour cold water over the fuel pump and fuel lines while the ignition is in the off position. Keeping these air flow areas clean will help to keep the engine as cool. I would try wrapping the metal fuel lines near the engine with thermal resistant heat shielding tape… Or called exhaust / header tape… Sold at parts stores or speed shops, online, etc… Some people just use aluminum foil to wrap fuel lines with limited results in blocking heat transfer. CLEAN AROUND THE ENGINE AIR INTAKE & COOLING FINS. ![]()
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