Fuel cut

[Sugen]

The error

1 Fault Found:
000135 - Fuel Rail/System Pressure: Too Low
               P0087 - 002 - Lower Limit Exceeded - Intermittent
             Freeze Frame:
                    Fault Status: 00100010
                    Fault Priority: 0
                    Fault Frequency: 1
                    Mileage: 68059 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 16:12:43

             Freeze Frame:
                    RPM: 4138 /min
                    Load: 80.4 %
                    Speed: 141.0 km/h
                    Temperature: 85.0°C
                    Temperature: 36.0°C
                    Absolute Pres.: 860.0 mbar
                    Voltage: 13.589 V

Readiness: 0000 0000


Things that have been replaced , Cam, Cam Follower, HPFP, Low pressure sensor as part of TSB.
Current Mods  Revo STG 2 ,  Forge Intake, 3" DP

So what I can acertain from the logs the pressure in the rail fluctuates and sometimes drops to 70bar shortly after this car goes into limp mode. Usually occurs when loading the car in high gear from low rpm.

Anyone have similiar issues its been to the Dealers on numerous occasion any ideas.

[vRStu]

Are you running a modified fuel pump?

Have you looked at the in tank pump?

ED30 or normal GTi?

[Sugen]

Are you running a modified fuel pump?

Have you looked at the in tank pump?

ED30 or normal GTi?

Running standard pump max requested pressure is 109bar. Couldn't get the car to throw errors when i decided to log the in tank pump looks like its delivering 5 bar + need to get it to fail while i'm logging it tho so I can check pressure vs the rail pressure.

[vRStu]

Seems simple then, you need a modified fuel pump.

You can get fuel cut on stage 1 let alone stage 2.

Your fault occurred at just over 4k rpm which is classic fuel cut region.  The fuel pump is cam driven and therefore directly related to engine speed.  In the mid range the pump cannot flow enough to satisfy demand.

[vRStu]

Have a look at this -

http://www.goapr.com/products/fsi_fuel_pump.html

[Sugen]

I understand and it makes sense. I was just under the impression that Revo Stg2 was designed to work with the standard pump,  I understand no 2 cars are the same and would just like to know if there are many others that also had to upgrade their fuel pumps.

I would like to upgrade to the Revo 2+ so before changing to an upgraded pump I wanted to make sure there are no underlying issues.

[vRStu]

Stage II 'may' work ok without the fuel pump but you've likely got the settings optimised for max power and with the addition of the intake and downpipe you're more than pushing your luck.

Stage II+ will for sure need a revised pump.

[bacillus]

Could you please state your revo settings?

[Sugen]

Could you please state your revo settings?

B7 T3 F9 - 95 Ron  fuel by the way this is at the reef and not the coast.

[gazbutS3]

like stu says, some people have fuel cuts running just stg 1, with you running the exhaust and intake, your asking more from the std pump, looks like its HPFP you need

[vRStu]

95 ron fuel 

Have you done any serious logging with those settings?

[Sugen]

95 ron fuel 

Have you done any serious logging with those settings?

Dude thats the best we have at the pumps     So sadly our performance doesn't quite match what you guys get overseas.

Yes I have done logging  my car obviously not the best example but on other cars yes.

[vRStu]

ahh, you see you didn't state that you were overseas.

[Sugen]

ahh, you see you didn't state that you were overseas.

Sunny South Africa

[bacillus]

Try dropping the boost down to T6 as with the higher booost you work your pump a little harder to keep up the rail pressure mid rpm range.

You said that you changed your cam follower, what did the old one look like? Did you visually inspect your cam for wear at that time?

That aside, you really need to post some live logging data to help you out.