924Board.org

PaulW · Joined: 19 Apr 2005 Posts: 7

My fuel pumps wont run,have replaced relay and checked pumps and all are working fine but pumps will not activate,any ideas as to what else it could be,pumps run fine if relay bipassed.
Paul

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

If relay is in place and working, fuel pump shouldn't run unless engine is running.
_________________
'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

Ozzie · Posted: Sun Jun 12, 2005 8:48 am Post subject:

The fuel pump should run for a few seconds when you turn the key on.
I think it runs on some models while cranking the starter as well.
(this is from the starter circuit)
After that it will run only when the engine is running.
Ignition switch??
_________________
Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance