TSI high pressure fuel pump

[zei20t]

its also a 2.0 147KW TSI not a 1.8. but thanks for the link. ive checked out other ebay auctions if I need to buy one.

but unless they can tell me exactly how its damaged it and why it happened now, 2 years after the tune, then I wont take it any further.

[Guy_H]

I don't know enough about it to debate it, which is why I put question marks.

Can it achieve 110% duty cycle if it's a mechanical pump? eg: the pump is designed to output xL/min at yrpm with the rpm being anywhere from (say) 500 to 6000 (redline ignition cut). This output is regulated / reduced by the built in high pressure fuel regulator but you still can't exceed the mechanical output with the electronic regulator - only reduce it?

or... How would you achieve more than 100% (unless you're a footballer, because they put out 110% all the time)

Basically - If Skoda's "specified" fuel pressure is say 110 bar & and the tuner requests say "125" bar then the fuel pump is well outside of Skoda's designated spec.

It will work harder & longer to supply the extra fuel, possibly outside the original design spec from the manufacturer.

[parso_rex]

You have a table that you program to set the desired fuel pressure and then other tables that modify the duty cycle in order for the pump to be able to make that pressure. Many tunes around don't even modify any of this because their too lazy or don't even know where the maps are located.
If they blame the tune its also a bit weird because they really have no idea about very much at all

[Notso Swift]

hang on, isn't the high pressure fuel pump driven by the cam? its all mechanical and dependent on the RPM of the engine

Yes it is cam driven, but not sure if it is regulated to a constant pressure or not

[zei20t]

it has a single plug in the pump. I assumed for the pressure sensor to know when its failing. maybe the sensor is gone? ha!

they had it all day yesterday, and will need it again today because they have to go through 'flowcharts' to diagnose the issue. and because my car is modified, they have to adjust the output of the test to compensate for the modifications to their expected output

sounds like a line to me. ill be yelling and being less patient today when I speak to her if the car isn't ready today.

my guess is they don't really want to look at it because its a warranty job and putting it on the lowest priority.

[Guy_H]

It could just be the sensor - but the sensor is not sold separately.

[parso_rex]

That spiel sounds like BS to me too.
I would have had the stock file put back on but hindsight is a bit useless now I know. Did the tune even modify the pressure ? I'd actually be surprised if it did.

[zei20t]

unless they can prove the remap has caused the pump to fail; ill fight to the death to have this fixed under warranty.

the sucky thing is, its 2 days to Christmas and I may not have a car. and I bet they wont be willing to give me a loaner.

[zei20t]

been offline for a bit, didn't have a chance to reply.

went to the dealer to pay for it just so I can have the car back - after my multiple calls to skoda aust and posting on their FB wall and also private messages to them - as I was about to pay the $1600+ bill, they phoned me and I didn't pay a cent.

agreed the car WAS still under warranty, they will fix it their end, and my car has been back on the road and is running well again

thanks all for your input, dealer was a bit squeamish after seeing the mods on my car (nothing too serious) but agreed the remap didn't cause the problem.

[Guy_H]

Good result