TSI high pressure fuel pump

[zei20t]

Anyone had one die on a CCZ EA888 engine? is this a common failure?

Looks mine has failed. wont rev very well over 2000rpm. but car still operates.

going to take it in to Skoda tomorrow to have it looked at.

hopefully can book it in next week to be replaced.

[brad]

Mine died in the first few months of ownership back in 2008. It was the integrated fuel pressure regulator IIRC. Complete HPFP replaced under warranty & no issues since.

The mechanic reckons it was a hard job - I have no idea why. He was from their HSV workshop so I think working on a Euro freaked him out.

[Jmac]

Anyone had one die on a CCZ EA888 engine? is this a common failure?

Looks mine has failed. wont rev very well over 2000rpm. but car still operates.

going to take it in to Skoda tomorrow to have it looked at.

hopefully can book it in next week to be replaced.

yeah seen a couple, sounds like it was only running on tank delivery pressure. Which is a tenth of the HPFP

[zei20t]

thanks for the replies.

skoda have the car now. they are apparently going to blame the tune for causing the fuel pump to die and perhaps not replace it under warranty.

really not sure how that can happen.

[brad]

They are $600 on ebay if that's any help
High Pressure Fuel Pump Skoda Octavia 1Z3 1 8 TSI Hatchback 160 BHP TOP German | eBay

BestParts Store in the UK has them for GBP170 inc 20% Vat (should be able to get this removed). Postage is GBP65 = approx AUD460 delivered - maybe AUD410 without the VAT

Partno appears to be 06H127025P and there are some Bosch alternatives

(this is BZB but work backwards to your year and then drill down again.

SKODA OCTAVIA [OCT] (EUROPE) 2007 [1Z-7-000 001 >>]: ENGINE: 13352. FUEL PUMP; FUEL RAIL; INJECTION VALVE

I'd be asking why the tune would kill the HPFP. I've had my tune for 100k of the 150k I've travelled without issue. What could the tune possibly affect in the HPFP?

[Guy_H]

The tune (should) change the HPFP request, to supply more fuel as part of the tuning equation, so just like turbo's and all other associated hardware, it COULD be deemed to have been effected by a tune (as its working harder than Skoda had intended).

Mind you, how did your tune get detected? It's a Bosch EDC17 which is easily set back to stock binary & stock flash number.

Also depending on part number, I may have good used ones on hand.

[brad]

But ultimately you aren't exceeding the 100% duty cycle / flow rate / designed RPM of the pump????? So it's like driving around at 4000rpm all the time instead of 3000rpm - both of which are within the design parameters of the pump.

[Guy_H]

Skoda (and other manufacturers) don't see it that way brad.

What if the tune requested 110% duty cycle?

[brad]

Skoda (and other manufacturers) don't see it that way brad.

What if the tune requested 110% duty cycle?

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)

[zei20t]

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

[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.