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Warm Start Problem

Engine

Vehicle Information: Model: 911 ; Year: 1981; Body Type: Targa; Total Mileage: 110,000;

My 3.0l 911 Engine with Webber's has recently started acting up when warm. I did have the fuel pump changed about three years ago with the Facet fuel pump. When cold I pump the gas twice and it starts instantly, and always has. Now when it's hot it does not want to start. It turns over well, but I have to try a variety of pumping the gas, keeping it to the floor etc. to finally get it to start. I have been lucky and I usually can get it started after about 30-45 seconds of cranking. I am afraid I'll burn the starter, or it won't start at all. If I let it sit for about 1 hr, it starts easily as usual.

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