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Jim Adney wrote: >One more possibly interesting detail. This car has had a long term >problem of needing the fuel ring to be primed before it would start >easily. Now that tendency seems to have gone away. It makes me wonder >whether the aging rubber plug was letting the pressure leak out of >the fuel ring and that the new Teflon plug has fixed that problem. I >had worked over all the other suspects in this car's FI system >without ever seeing any effect on the startup problem, so I suspect >that this may have been the root cause. > > I wondered about this- outside of an obvious fuel leak (from a hose or an injector, for instance) the only other places where I would believe would have an effect of maintaining the system pressurized is the pressure regulator or this component in the fuel pump. The regulators are a pretty bulletproof piece of hardware I'm told, which leaves this pump component as a potential culprit. What else could it possibly be? Even vapor lock would maintain some level of pressurization (with vapor, of course, but still) but the pump itself would still be primed in that case to push the vapor through. >Unfortunately, it has also turned colder here, so this problem MIGHT >come back the next time it gets warm. > >This pump failure worries me, because we have a LOT of these electric >FI fuel pumps out here, all with the same potential problem. The >little rubber part won't last forever on any of them and slowly they >are all going to die. My plan is to tool up to make a number of these >parts, so I can repair pumps for anyone. > >In the meantime, I intend to >rebuild some of the extra pumps I have here, just so I have known >good spares. I'll probably carry a couple in the caravan to the next >Invasion. > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~