Hi guys having some pump issues with my na 6 VL. I've had to replace my external fuel pump twice now in the last 2 weeks, will be driving along fine when car just shuts down. Try to start again but can't hear pump prime, checked fuses, relays, all seem fine. i change the pump and it starts again. Could the internal pump be dead and working the external too hard and it dies? any ideas? Cheers, Donny.

To find out if internal is at fault, go and see a mechanic to check the pressure. They have all the meters and relevant hoses for the job.

When the internal pump dies, it's feels like the car wants to die around 2,000 odd rpm. You just can't rev the engine out. Some original photos have not been recovered yet.

car still drives normal, i dont rev it out though, its just a cruiser. Contamination in the tank maybe? killing my pumps?

Check the flow rate of the pumps - it's easy to do and will soon tell you if either pump is not performing properly. First remove the fuel pump relay. Have an inline 15amp fuse with spade connectors at the ready. Next, disconnect the fuel hose from the low pressure pump (where it exits the fuel tank), and divert the hose into a bucket. Using the inline fuse, bridge relay terminals 85 & 87 while your ignition is switched on. This will cause the fuel pumps to run. After 30 seconds of pumping, disconnect the fuse. Measure the fuel pumped into the bucket. A properly functioning pump should flow one litre in this time. Reconnect the low pressure pump. Next repeat the exercise for the high pressure pump. It too should pump one litre in 30 seconds. If either of these pumps flows less it needs replacing.