Bruce, What is the actual fuel pressure?
bs Sent from my iPad 4 On Jul 29, 2012, at 8:01 AM, Bruce Giller <[email protected]> wrote: > Folks, > > On Saturday I did a thorough investigation of the tank's plumbing. The > fuel pressure light would wink out in about 1-2 seconds and the pump > sounded normal (not straining). I made sure that the fuel return plumbing > in the tank was clean by blowing air thru it and hearing bubbly noises from > inside tank (the tank was 1/2 full and the end of the return line was below > surface of the fuel). The two vapor recovery connections on the tank were > clear (blew thru them), and the vapor container's three connections were > clear. I double checked the vapor line inlet valve in that it didn't > release pressure but only allowed air in. The vapor recovery line was > clear all the way to the engine - little volume goes thru this line that's > for sure. And I checked the exhaust system for leaks and there are none > nearby the tank that would cause the tank to heat up. > > I've still no idea just what is going here with this tank. > > As to the different styles of FI pumps that Alfa put on SPICA cars, Wes I. > has a great write up here: > http://www.wesingram.com/SPICA_Fuel_Supply_Diagnostic_Guide_Nov_2004.pdf . > My '73 GTV has the correct 2-port (one inlet, one outlet) FI pump. The > newer models had the 3 ports. > > Bruce > > On Sat, Jul 28, 2012 at 11:53 AM, John Palumbo <[email protected]> wrote: > >> I just thought of something else. If your pump only has one port exiting >> the top of the pump, its quite possible you have an entirely wrong pump for >> that particular car! I mean the newer Bosch pumps for the electronic >> injection cars have only one port exiting the top of the pump. So maybe >> someone swapped-out one these for the old styled original pump that was on >> the car, thinking that it would be more reliable. >> >> T-Mobile, America's First Nationwide 4G Network >> Sent by Samsung Mobile >> >> Bruce Giller <[email protected]> wrote: >> >>> John, >>> >>> My FI fuel pump is the new style with only two ports so there's no way the >>> gas can back into the tank from it. >>> >>> Bruce >>> >>> On Sat, Jul 28, 2012 at 7:18 AM, John Palumbo <[email protected]> >> wrote: >>> >>>> Just a quick thought, I would tend to think it would have something to >> do >>>> with the fuel delivery from the fuel pump. The fuel it would seem is >>>> getting pumped back into the tank, instead of to the pump where it >> belongs, >>>> hense you noticed it took longer for the pressure light to go out. >>>> >>>> If I can recall, the older pumps had three ports on them, one to the >> SPICA >>>> pump, one as a return to the tank, and I think the third was for some >>>> emmissions thing, I'm not sure. I know the the newer pumps had only two >>>> ports. >>>> >>>> So maybe if you had a spare pump, you could try installing it and see if >>>> it does the same thing. Perhaps there is a sort of check valve system, >>>> similiar to that of a diode thats gone bad, it being that alows the >> fuel to >>>> flow in only one direction, to the SPICA pump. The other thought would >> be >>>> to run it with the fuel cap off. But there should be no logical reason >> why >>>> the tank should be over pressurizing. >>>> >>>> John >>>> >>>> T-Mobile, America's First Nationwide 4G Network >>>> Sent by Samsung Mobile >>>> >>>> Bruce Giller <[email protected]> wrote: >>>> >>>>> Yesterday we (David Tallerico and I) attended a Seat Time session at >>>> Summit >>>>> Point track after a too-long hiatus. The weather temp wasn't hot but >>>>> pretty warm - mid to upper 80's or so. It is 1.5 hour drive from my >> house >>>>> there and we stopped in Charles Town for gas. at around 7:50 am. At >> the >>>>> station the car would not restart and we discovered that it was getting >>>> any >>>>> gas for the plugs were dry. The fuel pressure light went out but it >> took >>>>> longer than usual for it to go out; usually after running for a bit, it >>>>> only takes 1 second for it to wink out. I removed the return hose from >>>> the >>>>> SPICA pump and gas was pumped out with the fuel pump on. We 'fixed' >> the >>>>> non-starting problem with starter fluid sprayed down the throats. Off >> to >>>>> the track! >>>>> ..................... > -- > to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi > or email "unsubscribe alfa" to [email protected] -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
