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Have 78 Barth, 454 engine, after market headers which was on motor when I got the Barth. In hot weather engine has vapor lock when using fuel out of right side tank only. Any ideas how to stop this problem?
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I am certainly not Click or Clack but it sounds like a gas cap problem to me. If you had normal vapor lock it wouldn't matter what tank your using.
Thank you for your reply. You and Dave Bowers made some interesting points. I may have several problems. You mentioned a boiling fuel tank. The exhaust pipe from headers runs under the left side tank about two inches below tank. Several times, when refueling there has been a pressure build up in this tank causing a wait of maybe thirty seconds for the pressure to clear. I will need to extend exhaust pipe and some sort of heat shield to protect left side tank.
No electric fuel pumps on fuel tanks. Will look into adding those to tanks and the air ducts. Already installed some heat shields between headers and frame where fuel lines are located and was planning on wrapping lines that are still exposed to exhaust heat.
Will agree engines compartments get way too hot. No vapor lock so far only notice in warmer seasons, but want to fix before then.
Again Thank you
Thank You for your reply. This isn't a normal vapor lock as you suggest. Left side tank has a pressure build up from exhaust pipe running too close to tank. Your and Bills reply brought this to my attention. I again Thank You
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