How To test the Diesel High-Pressure system

[FrenchMike]

Originally Posted by longer86

Yes I am joking, but I hope people feel better with this

I do prefer Maciej

Mike

[Jules]

Originally Posted by FrenchMike

I'm afraid 6 year later that my tests are becoming obsolete now ...

Mike

I wouldn't call them obsolete Mike
Some folk have got in a real pickle with TOAF if they don't appreciate fully how a system works.
It's not the be all and end all.

You cannot beat old fashioned fault finding techniques for understanding the whole picture.

Main agents even today will scratch their heads if the screen doesn't pinpoint a fault!!!
There just ain't the skills out there no more

[marinabrian]

Originally Posted by FrenchMike

INVALUABLE informations

And opposite to T4 ,you can see them on the car in real driving !!!


I have ordred a £2 cable and i'm eager to have a play that deserves at least a donation !

"Sorry for my behavior" ???? What ? you're joking i hope ?

Mike

Mike of course you can see these values and indeed all of the live data when driving using T4, and for reference a healthy MAF should read between 495 and 505 mg/stroke at idle and between 620 and 680 mg/stroke at 3000RPM off load, with an engine temperature > 60 degrees Celsius, and the EGR in the closed position



Readings as suggested earlier in this thread regarding MAF output are indicators of a failed MAF sensor.

Brian

[Arctic]

Originally Posted by longer86

You can also use TOAF live data feature to check fuel pressure.

[QUOTE]

Originally Posted by FrenchMike

I'm afraid 6 year later that my tests are becoming obsolete now ...

Mike[/QUOTE

]

Hi Mike.
Not necessarily for those whom do not have Toaf or T4 and everthing helps with the prognosis, great work by the way, thank you for sharing your knowledge

[FrenchMike]

[QUOTE=Arctic;2423386]

]

Hi Mike.
Not necessarily for those whom do not have Toaf or T4 and ever thing helps with the prognosis, great work by the way, thank you for sharing your knowledge

Thanks Steve ,i Hope you are well ?

Mike

[mauzao]

Originally Posted by longer86

You can also use TOAF live data feature to check fuel pressure.

I have Toaf but i don't know how to use the live data feature, what's the field to check fuel pressure and what are the expected values?

Thks

[mauzao]

Originally Posted by longer86

You can also use TOAF live data feature to check fuel pressure.

Hi there,

What fields should i read and what are the values that i should get?

Thks

Pedro

[Jules]

At idle

Low pressure 350kpa

High = 28,000 - 30,000 kpa

[mauzao]

Originally Posted by Jules

At idle



Low pressure 350kpa



High = 28,000 - 30,000 kpa

Would it be the 2 highlighted fields in the image?

Enviado do meu Xperia Z Ultra através do Tapatalk

[Jules]

I assume so. We use T4
Those numbers are at 2770 rpm.

You'll have to convert BAR to kpa.

The low pressure stays pretty much constant at 350kpa but the high pressure will vary from 28,000kpa while cranking to start up to around 180,000 at higher revs.

What reason are you monitoring the pressures?