[DML] Re: fuel pump / tank problem - Can anyone HELP???

["Wilson Hitchings" <canon20dfan@xxxxxxxxx>]

I have nothing to add but the obvious...if the fuel was expelled from 
the tank, then positive pressure was created while driving/pumping. 
You most certainly don't want a pressurized tank, but a negatively 
pressurized one won't pump gasoline, either. I thought a vented gas 
cap took care of all this...


--- In dmcnews@xxxxxxxxxxxxxxx, "daviddlasvegas" <daviddlasvegas@...> 
wrote:
>
> Since having my fuel sending unit replaced, I've had a problem of 
my 
> fuel pump vibrating and humming loudly. I thought the problem was 
> heat related, but recently the problem started occuring in cooler 
> weather too. Its now so bad that within 10 minutes of running the 
> car, the fuel pump starts humming very loudly.
> 
> What's odd is that the pressure balance in my fuel tank is screwed 
> up. When you stop the engine and take the gas cap off a whosh of 
air 
> gets sucked in.
> 
> But tonight something different occured. I took the gas cap off 
> after drivng the car for an hour and a steady stream of hot 
air/fuel 
> vapors came out. It was *extremely hot*. It blew out in a stream 
> (like when you blow thru a straw) for a complete 2 minutes. Later 
in 
> the evening when I got home the pump was humming very loud, I took 
> the gas cap off with the engine running and boom - like Old 
Faithful 
> the gas gurgled up and spewed out the fill spout in a stream about 
> 12-15" high.  The entire hood of the car, windshield, and 
> myself were covered in gasoline. Thank goodness there was no 
> ignition source or I'd be a roman candle. I jumped in the car and 
> shut the engine off.
> 
> I had the guys at Delorean One replace the venting pipe and tubes 
> which did not solve the problem (don't mind though since my 
original 
> components were such a mess anyway).
> 
> Does anyone have any idea as to what's going on? I'm getting fed up 
> with this. I don't like messing around with fuel vapors and the 
fuel 
> system for obvious reasons.
>




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