Who knows target fuel pressure at idle. Rs2 adu

**Mikes2** · 25 April 2017, 14:50

3.8-> 4.0 bar without vacuum

3.2->3.7 bar with vacuum

**gutya** · 25 April 2017, 19:19

Thank you for reply. So with stock 3.8bar adu regulator I now have 3.6-3.7 kpa with vacuum and 4.2 without. Do you think it is normal?

**blackS2** · 26 April 2017, 04:53

Originally posted by gutya

Thank you for reply. So with stock 3.8bar adu regulator I now have 3.6-3.7 kpa with vacuum and 4.2 without. Do you think it is normal?

Was the same at my car

**M_GORDON** · 2 May 2017, 13:37

Something is wrong...
If the regulator is 4bar, is 4 bar. Latter if you conect the vacuum system, you must discont this vaccum value.

**gutya** · 8 May 2017, 16:18

My regulator is 3.8 bar. And fuel pressure is 3.6 with vacuum on and 4bar with disconnected vacuum. What could be wrong?

**Mikes2** · 8 May 2017, 17:20

those numbers are in spec which suggests nothing is wrong.

what symptoms or faults do you have to be measuring fuel pressure

**pasbogdan** · 8 May 2017, 19:49

Values should be near:
1.No vacuum=value of the regulator
2.Vacuum=value of regulator-intake vacuum value
3.Boost=value of regulator+boost value

**newsh** · 8 May 2017, 21:01

Maybe the return to tank is blocked or damaged under the car.
Or the pressure gauge is not accurate.

**M_GORDON** · 9 May 2017, 13:00

Originally posted by pasbogdan

Values should be near:
1.No vacuum=value of the regulator
2.Vacuum=value of regulator-intake vacuum value
3.Boost=value of regulator+boost value

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