Classic Rangey Fault

Got a classic 3.9 auto on gas with a starting fault.Turn the key and it runs for 10 seconds and cuts out.Turn the key and it starts again then cuts out.Fitted a new tank and pump,filter and replaced a leaking fuel pipe,still the same.Check if pump relay switch on while it runs.OK.Plenty of fuel at the engine when pipe removed.Fitted a air flow meter of a running engine and still the same.
ANY IDEAS?

if the fuel systems ok and the air is unrestricted that only leaves the ignition ? have you got a spark , and is it a healthy spark ? it maybe that the ignition amplifier has jossed it .
rick.

Thanks Rick I will try this.But still cant understand why it starts straight away then cuts out?
Cheers Barry

i know its wierd mate but thats the way it can go with them , just check the spark to confirm this is the problem
rick.
( i had one a long time ago on a rover sd1 3500 which acted exactly as you are describeing now )

Thanks again mate will try tomorrow. Will let you no
Barry

After further investigation I found that some numpty had fitted a one way valve in the fuel line and it had semi collapsed. Runs great now thanks for the advice.

bazfm said:

After further investigation I found that some numpty had fitted a one way valve in the fuel line and it had semi collapsed. Runs great now thanks for the advice.

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glad you sorted it mate .
rick.

This might sound obvious but it is not the immobiliser is it. mine does this when i forget to turn it off.

Jon.

if its the immobilizer the car will not start in the first place. but the car starts and just dies after a while. anyway the problem is solved already