seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Removing and installing fuel tank > < Checking delivery rate
Checking fuel pump non-return valve
Checking fuel pump non-return valve
Prerequisites
l  Remote control -V.A.G 1348/3A- is still connected
l  Pressure gauge -V.A.G 1318- is still connected.
Test sequence
  Note!
With this check the fuel supply connections from the delivery unit to the point at which the pressure gauge -V.A.G 1318- is connected will also be checked for leaks.
   
–  Close pressure gauge cut-off tap (lever ar right angles to through-flow -position B-).
–  Operate the remote control for short intervals, until a pressure of 3 bar has built-up.
  Caution
Danger of spray when opening the cut-off tap, hold a container over the pressure gauge free connection.
–  If pressure build-up is too high, lower excess pressure by carefully opening the cut-off tap.
–  Observe the pressure drop on the gauge. After 10 minutes the pressure must not drop below 2.5 bar.
If the pressure drops further:
–  Check line connections for leaks.
If no wiring fault is detected:
–  Fuel pump defective, renew fuel delivery unit → Chapter, Removing and installing fuel delivery unit.
  E20-0079

Removing and installing fuel tank > < Checking delivery rate