Fuel Rail Pressure Test with VCDS by Ross-Tech

This shows how to read fuel rail pressure and a simple test to help verify there are no pressure leaks. The example shown are for gas direct injection engines.

This video also highlights the difference between a CAN and UDS modules, as well as how different modules can do things differently.

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[longgoneg]

Great walk through, used on 06 BPY.
I have a cyl 2&4 misfire. Plugs and coilpacks just replaced. I ran this test and was somewhat pleased to find I don’t have any leaking injectors. Now I can trouble shoot wiring. Thanks guys

[hendersonjp]

nice to have you back .ace info thanks

[clearkill]

I've noticed my values for group 230 are very low. Specified never exceeds 1.99 and actual is either 0 or .96 while group 140 actually shows proper rail pressure of at least 40bar

[kritikos]

where you find all this code for the group???

[jasonfoster]

What is the most common cause if the vehicle loses pressure after being shut off? Fuel pump check valve?

[matedu]

Hello. I would like to know if it is possible to check the pressure from the oil pump for the engine, to see if it works within my parameters.Because I sometimes get a low oil pressure message.And I would like to know if with vag com you can check the pressure, and what are the values ​​that should be in an Audi Q5. Thank you

[necromastercz]

Hello, I have EA888 engine (1.8 TSi from 2010) and my appearance for group 106 is bit different - I can see here value "Fuel Temperature (calculated)" that shows temperatures about -50°C (yes minus 50). Any idea how is this temperature calculated? I have problems with extreme rough cold starts and this seems to be in relation with my problem.
Thanks

[valentindobre]

Hy Ross… can u help me … i have golf 6 . 160 cp last 2 weeks i change high pump becouse i see leak petrol in oil and now i see … fuel rail when engine is off 49bar is go down …! High pump is new before that the old pump when i testing pressure is going up to 120 bar … what the problem i have ?

[Theoloop]

So mine stays steady for 5+ minutes and never rises. Are there other steps to diagnose further? 2.0t fsi, rough idle every once in awhile. New plugs coils and cleaned valves.

[adrianculda]

I've got Sharan 2.0 2011, and have done everything you have said in the video, my fuel high pressure: actual value was 4700hPa at 84⁰ Coolant Temperature, after shut off the engine and start again but not the engine, the Fuel High pressure has decrease at 2200 hPa after 2 minutes, so didn't increased as you said in the video, could I have a problem? Thanks

[avantsautomotive]

Good job Jeff It was a hard lesson for me and you to come up with high pressure in the 140 block ???? Your welcome HAHAH Thank you for all your help on my issue with that a-6

[djamel_bijoux]

On my 2011mk6 GTI I have a p2293 when the car gets to operating temperature it stall and won't start until it's cooled down any suggestions please ?

[louisstroomer]

Tested my (suspected) Fuel Rail Pressure today the way you showed. My Passat has the 3.6 BLV engine and shows the engine light and idles pretty rough. During the test it shows a pressure of around 128 Bar. It doesn't tell me the specified pressure it should measure do I don't know for sure if it's to high - can you confirm please? After shutting the engine down the pressure drops to around 118 bar right away, then slowly rises up to around 128 again if I wait 10 minutes. Does that indicate a leak? If a fuel injector is bad, or a fuel injector gasket is blown, is there a way to tell? I noticed the lambda for both rails around 20 (and specification is -10 to +10, it says). Can you please advise? Thanks, Louis

[wiiiiw-qg]

How long such 63bar shall last? Engine is cooling down, so it shall keep 40bar or can go lowe and how fast?

[jvecu]

On Golf 7 2013, 2.0 TDI what is the right value of fuel pressure? Mine is about 25.000-30.000kpa on 800rpm is that the right value?

[KenyonPayne]

I bought a 2010 Passat CC and has a p0088 with rail pressure being at over 80bar at idle. What can I test to determine what's the problem?

[daves]

Mine went from 36 to 42 after 4 mins. 2013 V6 Audi S5. Should it be higher? I smell fuel while driving plus fuel in oil.

[popmayhem]

Hi Ross-tech..tried to do this on a mk5 golf/rabbit and all the suggesed group numbers (106, 140, 141, 230) are blank (no readings) even on latest vcds. using micro-can cable. what would be the reason for this?

[redadiagnostic]

How you can know this code like 106... Can you help

[Atrociousa]

Is there a specific pressure it’s suppose to go to and stay at? After shut off my pressure can go up to 100bar