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Discussion Starter · #1 ·
We've got a 1997 4.6 HSE that has now burst 3 fuel pumps in 2 months...

The first one it burst was the original LR pump, it burst the plastic pipe that takes the fuel from the pump out of the top of the housing, we replaced this with a Britpart pump which promptly did the same thing within a fortnight.

As taking the tank out isn't a particularly pleasant job we decided when we did it for a 2nd time we'd go with a genuine Land Rover pump as the Britpart one had failed so quickly.

Yesterday the genuine Land Rover pump failed again after about 2 or 3 weeks in the car.

The car has an LPG conversion on it so the petrol pump doesn't even get much use.

It keeps bursting just about where the red circle is on the plastic pipe in the picture below:



Has anyone ever heard of these over pressurising or know of any reason why they'd keep blowing?

Thanks in advance!

David.
 

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Discussion Starter · #3 ·
I wasn't aware that there was a filter on the fuel rail. Have had a look at RAVE and can't find any mention of it. Do you happen to know where it is?

The car runs perfectly on Petrol one minute, then switches to LPG when the throttle is blipped, then after a random amount of time when the pump decides to pack in, it's just lifeless until you start on LPG.

The only indication you get that the pumps packed in is when it won't start.

With the ignition on the pump will run for a few seconds and stop as if it's built up pressure. When checking at the rail there's no pressure and not even a dribble of fuel to be seen.

David.
 

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Discussion Starter · #5 ·
The standard filter? That was changed the last time we changed the pump.

David.
 

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Hi
Make sure you have connected the fuel lines the correct way round at the fuel tank, you may be pressurising the return line.
Also plug in a fuel pressure gauge to your fuel rail and check pressure
 

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Discussion Starter · #7 ·
Right, we found the cause of the problem today...

When the first fuel pump burst we thought nothing of it other then old age as it was the original Land Rover pump which is now some 15 years old.

The Britpart pump burst after a fortnight so we replaced that with a genuine one blaming a poor quality Britpart pump. The genuine LR pump packed in again after a fortnight on the car.

We took the genuine pump out again today and replaced the hose on it with some heavier petrol pipe, replaced the pump in the tank and lifted the tank back under the car. We tested the pressure at the fuel rail and found it was over 70 psi.

We changed the pressure regulator on the fuel line with one from a breaker we've got and the fuel pressure is back down to around 30 psi again now.

Wish we'd checked that the first time! At least now we've mastered the art of dropping the tank now!

David.
 

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When I bought the HSE it had the same problem with a slightly different cause. The fuel return pipe was completely blocked with crud. Not advisable I know; but even 150psi of air wouldn't get through.
 
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