P310B Please help, Stuck here.

[eklavya]

Audi S4 B8.5 APR Stage 1 93 map


6181 - Low Pressure Fuel regulation
P310B 00 [101] - Fuel Pressure Outside Specification
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 17035 km
Date: 2016.03.19
Time: 01:03:54

Things I have already done:
1. Changed the low pressure intank fuel pump fuel filter.
2. G410 low pressure sensor on high pressure fuel pump.

The car is having a fuel cut under WOT/hard acceleration randomly in any gear, the car idles fine, cranks immediately.
I logged the car with VCDS, I didn't know exactly what to look for, so I logged all advance measuring blocks related to term "fuel".

Company is telling me to change all the pumps, but i want to be sure. Please help.

[LYKUNO]

You might want to look at this current thread that is covering the same issue.

[chaos2984]

looks like the low pressure fuel pump cannot keep up with fuel demand of the high pressure fuel pump. The EFC valve on the HPFP is demanding 99% open and the fuel pressure on the high side is dropping. So The volume isn't there. Seems like the low pressure fuel pump cannot keep up with volume.

[eklavya]

looks like the low pressure fuel pump cannot keep up with fuel demand of the high pressure fuel pump. The EFC valve on the HPFP is demanding 99% open and the fuel pressure on the high side is dropping. So The volume isn't there. Seems like the low pressure fuel pump cannot keep up with volume.

Thanks will get the new pump

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[eklavya]

Changing low pressure fuel pump solved the problem, thanks

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[eklavya]

The new pump filter has a vent nipple right next to the main fuel line hole, but in the car there is no pipe which goes into it. Should I just leave it capped? The pump I replaced , had it sealed from underneath.

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[LittleDozer]

Audi S4 B8.5 APR Stage 1 93 map


6181 - Low Pressure Fuel regulation
P310B 00 [101] - Fuel Pressure Outside Specification
Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 1
Mileage: 17035 km
Date: 2016.03.19
Time: 01:03:54

Things I have already done:
1. Changed the low pressure intank fuel pump fuel filter.
2. G410 low pressure sensor on high pressure fuel pump.

The car is having a fuel cut under WOT/hard acceleration randomly in any gear, the car idles fine, cranks immediately.
I logged the car with VCDS, I didn't know exactly what to look for, so I logged all advance measuring blocks related to term "fuel".

Company is telling me to change all the pumps, but i want to be sure. Please help.

This is the exact same symptom I was having. Full throttle cut WOT into 4th gear. Upgraded the HPFP with autotech and now I think all that did was bandaid it because it still doesn't run well and I get P310B, just no throttle cut. I'll try the LPFP.

[fesmail]

I've been having this issue with APR stage 2 for over a year now, very frustrating

[fesmail]

Changing low pressure fuel pump solved the problem, thanks

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So the lpfp replacement worked? How much did this cost?

[eklavya]

So the lpfp replacement worked? How much did this cost?

Yes It worked, it cost me around $590.

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[fesmail]

Yes It worked, it cost me around $590.

Sent from my ONE A2003 using Tapatalk

Awesome, hopefully this fix will work for me...... Do you have the part # for the pump?