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fuel tech questions

360Rocket
in Pontiac Performance Discussion/Questions

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6 hours ago, JUSTA6 said:

I'm still back at the tank, even with the pinch, as to why it's not vented properly.  It should have to be vented with fuel flowing back to the tank.  Fix the pinch, then on to the vent.  Good luck, hope it's all simple.

There are 2 vent hoses on the tank that are clear of obstructions and venting properly.

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  • Last Indian
    Last Indian

    Did you or can you disconnect that line at the hose connection of the fuel pump and see what happens? Does it pump out gas, does it suck, is it vapor? It might help diagnose that’s going on!

  • JUSTA6
    JUSTA6

    Randy....sorry haven't checked back in.  Been busy.  Looks like most info has been covered for you N stuff to check.  I don't believe the cap is vented (could be totally WRONG!) BUT... Esp since you s

  • Frosty
    Frosty

    I have a theory and it is just a theory. The return line is coming from the fuel pump. As we all know, it is Pontiac's solution to over pressurization and vapor lock. Therefore it returns excess gas a

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On 3/15/2019 at 11:27 PM, 360Rocket said:

There are 2 vent hoses on the tank that are clear of obstructions and venting properly.

Headscratcher for sure.

    • Haha 1

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