Fuel problems with my '03 75 Cdti tourer.

[just-john]

Hi Guys.

I'm currently having a problem with my '03 tourer with 76000 on the clock. I allowed her to run a little low on fuel last week and since then she just refuses to start.

She won't start at all when cold except with easy start but will occasionally when hot, with lots and lots of cranking, once again easy-start produces instant starts.

Once started she runs as well as ever with no hesitation or stalling and will rev freely up to the redline with no sign of misfire.

I've tried nipping the injector return pipes and get no sprayback, this makes no difference to the non-starting either.

I can hear both fuel pumps running and have changed the fuel filter; however, if I disconnect the under-bonnet pump the car won't start and run at all, even with easy start. Disconnecting the in tank pump makes absolutely no difference, it will start with easy-start and run as normal.

Before running off to my local injector centre "costapacket motors", I would value the opinions of you wise ones. I now strongly suspect that the problem is with the in-tank pump and lean strongly towards replacing this as my next port of call. Is this advisable or would you go to "costapacket" for the diagnosis first?

If replacement is recommended, I intend to go down the peugeot route as posted by Efreeti but I can't seem to be able to contact Simon for the photo's; does anyone have the PDF file or know how I can obtain it?

-John.

[Alan.F]

Have you done the leak off test? someone on here did a "how to" but can't seem to find it at the moment

[just-john]

Yes Alan, I did the leak off test but it still wouldn't start.

-John

[FrenchMike]

Hi,John

If you can lead some electric measurements;
there are two important informations.

1 Low pressure fuel sensor (fuel filter housing):
for 2.6 bars,you must have about 4 volts on the yellow/blue wire

(sensor disconnected,engine can start)


2 Fuel rail pressure sensor(at the end of the fuel rail)
(blue/black wire)
you have:1.3 volts at idle and 2 volts at 3000 rpm.

(sensor disconnected,one can start the engine too)


And don't forget ;during cranking,the tachometer move slighty
(Showing crankshaft sensor is OK)

Mike

[just-john]

Ok thanks Mike. I'll get my multimeter out tomorrow and try this.

I assume that the crankshaft sensor is ok because it runs perfectly after starting with easy-start, surely it wouldn't if this sensor was faulty?

[FrenchMike]

Originally Posted by just-john

Ok thanks Mike. I'll get my multimeter out tomorrow and try this.

I assume that the crankshaft sensor is ok because it runs perfectly after starting with easy-start, surely it wouldn't if this sensor was faulty?

You are right,John

But it could be useful to remember


Mike