My 1998 Range Rover 4.6 HSE needed a fuel pump. The housing was cracked at the nozzle, so just replacing the pump wouldn’t work, I needed to replace the housing also. This 1998 Rover requires a fuel pump that is no longer available(STC4345). My Rover previously had a WFX101030 (STC4345) that was replaced in 2004 by the dealer. I replaced this with a WFX101020. I also added a new seal ring and fuel filter.
Atlantic British has a hybrid at $600 (STC4345ABP) that they have modified to be a WFX101030 at twice the price of a WFX101020.
The WFX101020 was a little shorter than the WFX101030, but I lengthened it and added longer new fuel submersible hose before putting it in to make sure it would fit all the way to the bottom of the tank.
I’ve measured the fuel pressure at the schrader valve on the fuel rail. With the engine off, the pressure is at zero. When I turn the ignition switch to ACC, the pressure spikes to 40Psi after 3 seconds then falls back down to 0 PSI a second later. If I run the starter the second the pressure reaches 40PSI the engine starts on the 1st turn and then continues to idle with the pressure at 30psi and runs fine with full power on highways and going uphill. If I try to start it immediately without leaving it in ACC for the exact 3secs the engine does start after running the starter on the 3rd time consistently.
I don’t have the specs on the fuel pump in the WFX101020 vs the WFX101030. What could be causing it to start this way?
I’m dreading having to drop the tank yet another time to ‘try’ another fuel pump.
Be kind gents....