fuel pressure

[madmatt]

Hi all what should the fuel pressure be on a diesel on the low pressure side?

thanks Matt

[Arctic]

Hi Matt.
below is a quote from MB on the fuel pressure for the diesel

Originally Posted by marinabrian

Twin pump cars with healthy pumps generate circa 370 Kpa 3.7 Bar, and single pump cars 420 Kpa 4.2 Bar, or in real money 60 psi

Brian

Single ITP
1

UBP.
2

Matt what problem are you having ?

[tonytolle]

Originally Posted by Arctic

Hi Matt.
below is a quote from MB on the fuel pressure for the diesel



Single ITP
1

UBP.
2

Matt what problem are you having ?

Bit of an aside ,but do the single pump cars not have the pierburg pressure relief valve ?

[Arctic]

Hi Antony.
Are you referring to one of these below.
1

2

3

[tonytolle]

Originally Posted by Arctic

Hi Antony.
Are you referring to one of these below.
1

2

3

Yes that's right they stop the pumps overpressurising the system

[Arctic]

Hi Antony.
Yes the facelift single ITP model also have the above valve.
1

[madmatt]

Originally Posted by Arctic

Hi Matt.
below is a quote from MB on the fuel pressure for the diesel



Single ITP
1

UBP.
2

Matt what problem are you having ?

I had the intank pump fail so changed it (although before removing it I just disconnected and reconnected the block connector on top and it started working again but changed it anyway) but for a little while after it was still a little sluggish starting, although its back to normal now so checked the pressure and was only getting around 3.5/3.6 bar and I kinda remembered it should be about 4.5 bar but obviously that's for the single pump type.

[tonytolle]

Originally Posted by Arctic

Hi Antony.
Yes the facelift single ITP model also have the above valve.
1

Many thanks Arctic