A non-vented system would eventually cause the car to die from fuel
starvation... ie, the fuel pump wouldn't be able to overcome the back
pressure that would build up in the tank.
That being said, I seriously doubt that would happen in 5 minutes.
The way to check though is what you described. try running the car
without a cap on it and see what happens.
Is it possible the tank you installed had crud in it? If so, then
what's more likely is that the crud came loose, and plugged up your fuel
filters in that first 5 minutes..
Hope that helps!
Eddie
Steve Harvey wrote:
> Group,
>
>
>
> I installed an original gas tank on my 68 L18 project car. The tank doesn't
> have a return line on it, just the feeder line and an overflow tube from the
> filler neck back to the tank. I installed a locking gas cap, added 2 gallons
> of fuel and started the engine. It ran for a few minutes and then died and
> will not start again. I'm wondering if the keyed gas cap is the problem in
> that it may not be vented and causing a fuel flow problem. If the weather
> warms up again and I can get the car outside I'll try starting it without
> the cap installed. I did find another keyed cap that states that it's a
> vented cap. If the problem is indeed caused by lack of venting I'll switch
> out the caps. Does this sound like I'm on the right track?
>
>
>
> Steve
>
> Milwaukee
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