Fuel problems with my '03 75 Cdti tourer.

[just-john]

Hmmm, maybe we're getting closer to the root of the problem.

With the ignition in position 2 as you suggest without the engine running and with the multi-plug unfastened and turned around, so that I am looking at the female ends with the centre one uppermost:

I get 4.98 volts on the centre connection; I also get a reading of 5.62 volts on the left hand, yellow/blue connector with no reading on the right hand connector.

The engine also cut out for the first time this morning, just ambling along at a steady 50mph and it cut out. Restarted 1st time with the easy-start.

Does this mean that I need an ECU specialist?

-John.

[FrenchMike]

Originally Posted by just-john

Hmmm, maybe we're getting closer to the root of the problem.

With the ignition in position 2 as you suggest without the engine running and with the multi-plug unfastened and turned around, so that I am looking at the female ends with the centre one uppermost:

I get 4.98 volts on the centre connection; I also get a reading of 5.62 volts on the left hand, yellow/blue connector with no reading on the right hand connector.

The engine also cut out for the first time this morning, just ambling along at a steady 50mph and it cut out. Restarted 1st time with the easy-start.

Does this mean that I need an ECU specialist?



-John.

john,


Yes the third wire is the earth so 0 volts.
4.98 volts as a supply is excellent

Interesting,5.62 volts means that you have the same voltage connected or not ?

Please try again, connected (try to pick with à
pin throw the insulation)
you must have about 4 volts on the yellow/blue wire
4 volts equal 2.6 bars
this information tell the ECU ,the low pressure value.

If not,it looks like a faulty sensor or a bad connection.

Forget the ECU for the moment.

Mike

[just-john]

Originally Posted by FrenchMike

Please try again, connected (try to pick with à
pin throw the insulation) you must have about 4 volts on the yellow/blue wire
4 volts equal 2.6 bars, Mike

Thanks Mike,

Initially, I completely misunderstood your first instruction and disconnected the plug with the engine running which is where I got the original yellow/blue reading from.

I do have 3.96 volts on the yellow/blue wire with the plug connected and the key at position two, this drops to 1.05 volts as soon as the underbonnet pump cuts out.

-John.

[FrenchMike]

Originally Posted by just-john

Thanks Mike,

Initially, I completely misunderstood your first instruction and disconnected the plug with the engine running which is where I got the original yellow/blue reading from.

I do have 3.96 volts on the yellow/blue wire with the plug connected and the key at position two, this drops to 1.05 volts as soon as the underbonnet pump cuts out.

-John.

Very interesting,it shows the intank pump provide some pressure and the UBP
the complement.
At least all is correct on this side.

Are you sure of your injector leakback test ?

Mike

[just-john]

Originally Posted by FrenchMike

Are you sure of your injector leakback test

I'll check the injector leak-back again tomorrow, and if that's ok I see no option but to take it to the garage for diagnosis. Although I know that this will cost quite a lot of money, i need to get the car running correctly again as soon as possible, I rely on it as my sole means of transport.

Unless you have any other options I could try?

-John.

[FrenchMike]

Originally Posted by just-john

I'll check the injector leak-back again tomorrow, and if that's ok I see no option but to take it to the garage for diagnosis. Although I know that this will cost quite a lot of money, i need to get the car running correctly again as soon as possible, I rely on it as my sole means of transport.

Unless you have any other options I could try?

-John.

John,

don't worry,

even if a injector or two is leaking,you can replace it yourself.
All the infos are here.

Maybe can you try an injector cleener too ?

Mike

[just-john]

I did the leak-back test again this morning and got a result between number 2 and 3.

I don't know why I got no result last time, maybe I just wasn't squeezing hard enough, very annoying to think that I should have found it at the beginning of the week.

-John.

[FrenchMike]

Originally Posted by just-john

I did the leak-back test again this morning and got a result between number 2 and 3.

I don't know why I got no result last time, maybe I just wasn't squeezing hard enough, very annoying to think that I should have found it at the beginning of the week.

-John.

don't mind john,

Every day is a school day ! and the next time you will know how to
and all of us

Mike

[just-john]

Originally Posted by FrenchMike

Every day is a school day ! and the next time you will know how to and all of us

Quite true Mike.

Thank you very much for your time and patience.

-John.