ajtj's Post-Lobotomy Market Charts and Thoughts Message Board

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Strategies & Market Trends : ajtj's Post-Lobotomy Market Charts and Thoughts

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To: ajtj99 who wrote (30686)	7/15/2021 4:22:57 PM
From: Lee Lichterman III	Read Replies (1) of 97445

No, bad fuel filler neck would rule out vacuum building in tank so that's ruled out. Vapor lock is when gas lines get hot and fuel changes from liquid to vapor preventing it from being pumped/injected into the cylinders. Common on old carburetor models but still happens rarely on EFI. Some cars have the fuel lines running too close to the block and/or exhaust manifold so they heat up. When the engine is shut down, the cool gas stops flowing and the stuff stuck at the hot spot vaporizes creating an air bubble. Try to restart the car and the bubble keeps the liquid from flowing. A little rerouting or insulation wrap and problem goes away. I'm betting on weak pump. I wouldn't shotgun a part and would prove it first though. Auto parts store should loan you gauge and maybe vacuum tester for free. If you do replace it, get a good one. I've read some of the store label pumps can have 10-20 lbs less pressure. Will just mention stupid stuff like fuel filter, leak in line by fuel filter allowing air to get sucked in etc. Vacuum leaks making engine run lean though that usually shows up on cold engine, not hot.

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