If a seal isn't placed correctly it won't get to pressure. No biggie
Parts needed: new filter and 4 orings (one is a bit thicker than the other 3)
Tools: 8mm socket and driver, phillips head screw driver, various small-medium flat blade screw drivers, WD40 ro similar lubricant, work cloths to clean parts/ prevent fuel spilling in the car. one assistant (optional)
It is best to have half a tank or under to minimise fuel loss.
Remove rear seat base by pulling up at the front on each side.
On the driver side pull back the underlay to expose a plate held in with 4 screws, remove the screws and plate.
Unplug the electrical connector, start the engine and rev it until it dies. Pop the fuel flap and take the cap off (This is to release any fuel pressure).
(It may be a good idea to wear some eye protection here as sometimes there can still be residual pressure)
Be very careful here not to snap or crack the fuel hose connectors) Remove the fuel lines by squeezing the tabs, push the hose into the connector then pull the hose back.
After all the hoses are removed tuck them away between the body and fuel tank.
Undo the 8mm nuts around the fuel pump assembly and remove the bracket.
Gently lift the assembly, twisting anticlockwise and leaning from side to side as required to remove the assembly from the tank.
When you have the assembly out unplug the two connectors at the top.
There are some locking tabs around the casing, you can GENTLY pop these off with some flat blade screwdrivers (you may need an assistant here so they don't snap back into place).
Once they are all undone remove the filter and pump from the casing, you will notice either in the cradle or on the base of the pump assembly is an oring, this needs to be replaced.
Remember to lubricate all new orings with fuel before installation
From here you will notice a small black wire leading to the bottom of the pump, this needs to be undone at the base by squeezing it and pulling out its tab.
If you then turn it upside down there are 2 hoses connected to the filter, remove the hoses by lubricating them and gently prying them off. there are 2 more orings here, the black hose connector uses the odd sized oring (thicker)
Push the filter assembly down and on one of the metal sliding posts there is a small circlip, gently remove it.
Unplug the fuel pump loom.
Pull the filter and pump from the cradle, there is a tab on either side of the pump, lever them off and push the pump out (it is a very tight fit)
There you will find the final oring to be replaced.
To reinstall the new filter do the reverse of above.
Fit a new oring to the fuel pump, lubricating the oring in fuel fit the pump to the fuel filter.
Refit the fuel pump loom.
Fit the filter and pump to the cradle and refit the circlip to the metal post.
Fit 2 new orings to the hose connectors, the black connector uses the odd sized thicker oring.
Refit the grounding cable to it's tab.
Fit the final oring to the pickup hose and refit the cradle assembly into the casing.
Gently maneuver the assembly back into the fuel tank, lining up the seal around the top.
Refit the metal bracket ensuring it is lined up correctly and fit the 8mm nuts.
Reconnect all the hoses and the fuel pump plug.
Before proceeding refit the fuel cap and turn the ignition to the ON position.
Wait for the start up sweep to finish and crank the engine until it starts.
Rev the car ensuring there is no surging or spluttering, if all is OK turn off the engine.
Refit the plate and seat underlay.
Refit the rear seat, put the back down first then push down on the front to lock it in place.
If the engine does not rev smoothly then an oring may not be seated correctly and you will need to remove it all and refit the orings.
Built not bought, it's a way of life.