That is no way to test the check valve. Air will not seal the valve. Do the test on the acumulater. If it doesn't have a blown diaphram then I would suspect the check valve. The other 3rd possability is a sticking pressure regulater on the fuel distributer but that is much less likely. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Dani B" <5n-@xxxx> wrote: > Well I've had plenty of time to poke around the car today, so I began > with the fuel pump. Took it out and it seems that the check valve > works, but lets a very slight amount through. How I checked this out > was totally removing the pump and blowing through a line attached to > the pump. There was a small amount of air felt coming through the > bottom so that valve must be on its way out. I will reinstall the pump > and then go on to the accumulator. The method of putting the one line > in a pale sounded the easiest to see what is really going on. I will > try this and let you all know what happens. Thank you all so much for > your help! Dani B. #5003 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/