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On Fri, 2002-05-03 at 22:54, nathan howell wrote: > > The fuel pump turns on with the engine, in order to produce 31 psi it > has to have resistance in the circulation line. This is done with a kind > of check valve in the pump. My check valve is not functioning, therefore > no resistance, and no good pressure. The fuel is just racing around at > full bore. It is having a hard time getting up to 31 psi. That is what > he explained to me. Does this sound wrong in some way? > > Perhaps it just needs to be cleaned? > The check valve in the pump has nothing to do with the 31 psi pressure. That is strictly controlled by the regulator. The only thing the check valve does, is to help maintain residual pressure in the system after the engine is shut off. I am using a pump with no check valve,(not a VW), and have no problems with starting except that I usually turn the key off and on twice before I hit the starter. As long as the pump runs, and supplies fuel, I am pretty sure your problem is elsewhere. Check the pressure with the pump dead headed, by pinching the hose just before the regulator. You should get about 65 psi. Don't do this for very long, or you will probably blow the fuel pump fuse. -- Russ Wolfe '66 FB MT (It drove) '71 FB AT '65 Bug (not running) russw@classicvw.org http://www.classicvw.org ------------------------------------------------------------------- Search old messages on the Web! Visit http://www.vwtype3.org/list/