URGENT Help needed please

[joesgti]

have you lost any water?

[markymark]

have you lost any water?

Nope I think the water is still fine.

[QD MBE]

Hi Mark,

I am tending to side with the HPFP theorists.  Perhaps 'borrow' a pump?  to test the theory out.

Need to do some logging to see if the LP pump is supplying the HP pump the correct quantity of fuel, if the LP is not keeping up, the HP side will suffer.

D

[markymark]

Hi Mark,

I am tending to side with the HPFP theorists.  Perhaps 'borrow' a pump?  to test the theory out.

Need to do some logging to see if the LP pump is supplying the HP pump the correct quantity of fuel, if the LP is not keeping up, the HP side will suffer.

D

Cheers Dave, yeah im beginning to think its more fuel pump now.....anyone wanna let me borrow a pump!

[QD MBE]

Hi Mark,

I am tending to side with the HPFP theorists.  Perhaps 'borrow' a pump?  to test the theory out.

Need to do some logging to see if the LP pump is supplying the HP pump the correct quantity of fuel, if the LP is not keeping up, the HP side will suffer.

D

Cheers Dave, yeah im beginning to think its more fuel pump now.....anyone wanna let me borrow a pump!

I think you need to do the logging first Mark, i can't remember the measuring blocks, but you need to make sure the LP side is feeding the HP side enough fuel to deliver what it needs.

D

[markymark]

Hi Mark,

I am tending to side with the HPFP theorists.  Perhaps 'borrow' a pump?  to test the theory out.

Need to do some logging to see if the LP pump is supplying the HP pump the correct quantity of fuel, if the LP is not keeping up, the HP side will suffer.

D

Cheers Dave, yeah im beginning to think its more fuel pump now.....anyone wanna let me borrow a pump!

I think you need to do the logging first Mark, i can't remember the measuring blocks, but you need to make sure the LP side is feeding the HP side enough fuel to deliver what it needs.

D

Agreed but I dont have VCDS!

[RedRobin]

.
Not much help I'm afraid, but it's a pity you're not down south - I reckon the JKM guys would be able to find the fault with their huge experience of the 2.0T FSI.

Is it worth a phone call to Keith @ JKM: 0239 263 9933?

[markymark]

.
Not much help I'm afraid, but it's a pity you're not down south - I reckon the JKM guys would be able to find the fault with their huge experience of the 2.0T FSI.

Is it worth a phone call to Keith @ JKM: 0239 263 9933?

Cheers RR, yeah I know if I was closer I would be there like a shot. When we were en-route to The Ring SteveP kindly called JKM for there input but really without seeing the car they couldnt diagnose the fault. Hopefully the map will be switched back to stock this week so I can try and isolate the problem that way.

[joesgti]

i dont think you need a HPFP, my std pump never failed after 58k

[john_o]

sorry to hear the issues Mark.

from my perspective 10bar drop on req vs actual isnt unheard of on a K03 car , so whilst it is happening its not necessarily the problem. Im sure I have seen K03 cars drop more than this at 4krpm and not spit fault codes.
Does the req vs actual  recover as the revs pass through 4k  or continue to drop/ flatline at minus 10 bar??
for your remap whats the max requested? (110 /130)

Did you fit any new parts just before the 'ring that may just have pushed the fuel limit ?

Id err with stokeballon on a supply problem on the LP side... but what do i know 

[markymark]

sorry to hear the issues Mark.

from my perspective 10bar drop on req vs actual isnt unheard of on a K03 car , so whilst it is happening its not necessarily the problem. Im sure I have seen K03 cars drop more than this at 4krpm and not spit fault codes.
Does the req vs actual  recover as the revs pass through 4k  or continue to drop/ flatline at minus 10 bar??
for your remap whats the max requested? (110 /130)

Did you fit any new parts just before the 'ring that may just have pushed the fuel limit ?

Id err with stokeballon on a supply problem on the LP side... but what do i know 

john_o thanks for your response, id love to say I could answer your questions but I dont know is the honest answer. When it goes into limp mode thats it, no boost nothing, eventually it does come back after 30secs-1min, but it appears it will only do this for a limited number of runs before going into proper limp mode. Switching off and back on obviously clears it temporarily but if I gas it it goes again.  I have put the fault code into Google and most of the related links coming back suggest its the pump.
If I upgrade the fuel pump is it just the internals that make up the pump or is there more to it?
The only part which was changed prior to the ring trip was the clutch, a Sachs uprated one?

[bacillus]

I would also suggest you change your fuel filter if not already done as if it's clogged will give symptoms of of a bad LPFP and lean error codes.

Also, is your fuel tank petrol cap ok and properly screwed in tightly till it clicks?

[markymark]

I would also suggest you change your fuel filter if not already done as if it's clogged will give symptoms of of a bad LPFP and lean error codes.

Also, is your fuel tank petrol cap ok and properly screwed in tightly till it clicks?

I will do that, yeah the petrol cap is always fully tightened!

[SteveP]

sorry to hear the issues Mark.

from my perspective 10bar drop on req vs actual isnt unheard of on a K03 car , so whilst it is happening its not necessarily the problem. Im sure I have seen K03 cars drop more than this at 4krpm and not spit fault codes.
Does the req vs actual  recover as the revs pass through 4k  or continue to drop/ flatline at minus 10 bar??
for your remap whats the max requested? (110 /130)

Did you fit any new parts just before the 'ring that may just have pushed the fuel limit ?

Id err with stokeballon on a supply problem on the LP side... but what do i know  

It was requesting 110bar, but at times during the brief logging we conducted it was showing differences of upto 50bar (i.e. only reaching 60bar)  

IIRC this fault code has been seen on some bluefin cars where it was requesting too much boost, but the requested vs. actual was just over 10bar difference.

Mark if you want some help logging the LP and HP stuff again once the map is off then give me a call

[markymark]

sorry to hear the issues Mark.

from my perspective 10bar drop on req vs actual isnt unheard of on a K03 car , so whilst it is happening its not necessarily the problem. Im sure I have seen K03 cars drop more than this at 4krpm and not spit fault codes.
Does the req vs actual  recover as the revs pass through 4k  or continue to drop/ flatline at minus 10 bar??
for your remap whats the max requested? (110 /130)

Did you fit any new parts just before the 'ring that may just have pushed the fuel limit ?

Id err with stokeballon on a supply problem on the LP side... but what do i know  

It was requesting 110bar, but at times during the brief logging we conducted it was showing differences of upto 50bar (i.e. only reaching 60bar)  

IIRC this fault code has been seen on some bluefin cars where it was requesting too much boost, but the requested vs. actual was just over 10bar difference.

Mark if you want some help logging the LP and HP stuff again once the map is off then give me a call

Cheers Steve, the map is being taken off on Friday afternoon