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Re: [T3] gas mileage fix


On 20 Sep 2005 at 18:07, Jim Showker wrote:

> Early in the summer we got my son's '69 with EFI working well.  Got great
> gas mileage on the fwy.  However mileage around town was only 17-18 mpg.  We
> puzzled about this for a long time, til one day I was riding with him and he
> was taking a left hand corner pretty hard, and afterwards I smelled gas.  We
> traced it down and gas was leaking out the rubber to metal boot underneath
> the fender.

To this point, I was thinking that your story was pretty typical. It's common 
to find that hose broken and leaking.

> The rubber tube that comes out of the trunk is attached to the fill tube
> with a clamp.  The clamp was as tite as it would go and was not actually
> clamping the tubing.  Probly cause the dimensions of the rubber had shrunk
> over 36 years.  I wrapped duct tape around the rubber tube where the clamp
> went, to make it bigger.  Several wraps around and the clamp then functioned
> properly.

I'd recommend that you take a moment sometime and just get the correct size 
clamp. I don't know how long the duct tape will hold up, althought Red Green 
would be proud of you. This IS the overflow hose, isn't it; I can't imagine 
what else you could be clamping under there.

> No more gas leak on left turns, now, 23-24 mpg in town.

;-)

> This is especially interesting, cause the guy that sold us the car had
> basically given up, after all kinds of weird fixes (like adding pots in
> place of temp sensors), because he could not figure out why the mileage was
> bad.  He figured the efi was messed up and running rich.

Isn't it amazing how we ALL tend to jump to the worst possible conclusions.

> So if your gas mileage seems unexplainably bad, check it out.

Yes, strong gas smells are always a problem.

-- 
*******************************
Jim Adney, jadney@vwtype3.org
Madison, Wisconsin, USA
*******************************

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