| On Sat, 10 Feb 1996, Robert J. Donahue wrote:
> The gas tank on my TD develops positive pressure. I get quite a whoosh when 
> I open the cap. Is this normal?  Is there a vent hole clogged somewhere? I 
Prior to air pollution controls, I thought all cars had a vent hole in 
the gas cap.  If yours were plugged, however, I'd think it would 
interfere with fuel flow, since pulling gas from the tank would create a 
vacuum.    Anyway, check for a clogged vent hole in the cap.
   Ray Gibbons  Dept. of Molecular Physiology & Biophysics
                Univ. of Vermont College of Medicine, Burlington, VT
                gibbons@northpole.med.uvm.edu  (802) 656-8910
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