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[Big_Roger]

Hi,
Re my post Engine fires up then dies.
This was the syptoms, changed crank sensor without investigating further. Still no start.

Investigating, and find no fuel coming up to engine.

Query is: Should there be fuel delivered when the ignition is turned on, or will it not deliver until engine is cranking over. I don't have any fuel in either of these situations.

Had to leave car at this point, but will be back tomorrow to do some checks.
I know pump is in fuel tank.Any tips / hints, info on Fuse numbers, Relays involved ,will be appreciated.

[RobG]

Fuse #18 under steering wheel is the pump. Purple relay back of the relay box under bonnet. Pump will not work until engine is cranking over, will also not deliver fuel if crank sensor is dodgy. Did you pedal trick it for codes

[Entwood]

Genuine crank sensor ??  Properly plugged in ?? 

(I ask that as I was helping someone out last year and the "old" crank sensor plug was still there running to the loom.....  he had inadvertently plugged in the old one - that had no sensor on the other end - instead of the new one !!!)

[Big_Roger]

Hi Rob,
Thanks for info.
Have GS500 code reader, Have tried it, shows no codes found.

I thought I had read somewhere that no fuel until cranking.

Sensor is new pattern item, so really need some way to check if it's a fuel pump system problem or have I got a duff sensor


Roger

[RobG]

Hi Rob,
Thanks for info.
Have GS500 code reader, Have tried it, shows no codes found.

I thought I had read somewhere that no fuel until cranking.

Sensor is new pattern item, so really need some way to check if it's a fuel pump system problem or have I got a duff sensor


Roger

Either put a jumper from ECU pin 3 to pin 2 or remove the fuel pump relay and bridge the two contacts with a short wire link with two spade connectors attached

[omegod]

Getting a sense of dejavu here, exact same issue recently and mine still aint right, go for the purple fuel pump relay as it can be swapped with the one next to it.

good luck and report back mate!

[Marks DTM Calib]

Pop the lid off the fuel pump relay and press the relay internals with your finger....listen for the pump and observe the fuel flow. If no pump noise then get somebody to crank the engine whilst observing the relay for movement.

[feeutfo]

Is this with the Italian crank sensor fitted?

[Big_Roger]

Hi all, an update on progress.

Thanks to all for your advice. Armed with this I located that it was a faulty fuel pump. Final check was 12v supply direct to connections top of fuel tank and still no run. Did this as needed to be absolutely sure as replacement was £204.45

With all the banging with wood and hammer trying to get the castelated ring undone on top of tank unit it made the pump work again. This made it possible to drive the car home to complete repairs. This was good news, as I was having to do all the investigating and repairs in a public car park, that was also costing me £8.00 per day for parking tickets.

Once home, I made up a tool to undo the ring, and finally got the pump out.
Replacement has a different much smaller pump motor that comes complete with modified mounting chamber and complete with different fuel screen to fit in the original fuel pot in tank.

You have to crimp on a different plug (supplied) to connect existing wiring to the pump motor.

All finished this afternoon, now running fine. This is with the replaced pattern crank sensor that obviously wasn't the cause of the problem.

As I have left the old crank sensor and wire all in place, I will probably refit it back in crankcase and keep the pattern as a spare. At least I know it works OK.

Checking for fuel delivery is one of the checks I would advise anyone with similar symptoms before diving in to replace the crank sensor, as it's a sod of a job getting to the plug at the rear of the engine

Roger

[RobG]

Hi all, an update on progress.

Thanks to all for your advice. Armed with this I located that it was a faulty fuel pump. Final check was 12v supply direct to connections top of fuel tank and still no run. Did this as needed to be absolutely sure as replacement was £204.45
With all the banging with wood and hammer trying to get the castelated ring undone on top of tank unit it made the pump work again. This made it possible to drive the car home to complete repairs. This was good news, as I was having to do all the investigating and repairs in a public car park, that was also costing me £8.00 per day for parking tickets.

Once home, I made up a tool to undo the ring, and finally got the pump out.
Replacement has a different much smaller pump motor that comes complete with modified mounting chamber and complete with different fuel screen to fit in the original fuel pot in tank.

You have to crimp on a different plug (supplied) to connect existing wiring to the pump motor.

All finished this afternoon, now running fine. This is with the replaced pattern crank sensor that obviously wasn't the cause of the problem.

As I have left the old crank sensor and wire all in place, I will probably refit it back in crankcase and keep the pattern as a spare. At least I know it works OK.

Checking for fuel delivery is one of the checks I would advise anyone with similar symptoms before diving in to replace the crank sensor, as it's a sod of a job getting to the plug at the rear of the engine

Roger

Let a member have one for £20 t`other day

[Welung666]

I've got one here too 

[RobG]

I've got one here too 

It never ceases to surprise me why members don`t ask here first before laying out hard earned elsewhere :-? :-?

[feeutfo]

Good point re leaving the old sensor in place until the fault is confirmed though.

Difficult to diagnose.