Hi,

I've seen this in the forum a few times, but haven't yet found a thread that answers my problems, I'll keep it short and sweet to avoid rambling on.

2009 Octavia VRS, CR170 (not the PD engine) 104k miles

If I accelerate hard the car cuts out at higher revs, the coil light comes on and the car rolls to a stop.

When you turn the engine off and on again the fault clears and the car drives fine again.

The car has just been terracleaned, has a new fuel filter including housing with valve, is freshly serviced and otherwise doesn't miss a beat and is brilliantly economic on fuel and perfectly smooth to drive.

The problem has been present since about 70k miles and no amount of servicing or mileage has changed the problem or altered its characteristic is any way.

Has the fuel pressure been verified against what the fuel pressure sensor is reading? That would seem the logical first step. If fuel pressure is actually too high then there is a possible issue with the HP fuel pump. If the fuel pressure is actually within parameters then it's likely the sensor is faulty.

Thanks for your reply! I've been off the forums for about 18 months now and it's good to see that it's still so active!

I have VCDS so I could run some logs on this and see what it reports, my old MK1 Vrs lived on this as it was so highly modified, but, that's long gone and I've lost touch with it all!

Could anyone possibly explain what blocks to measure etc so I can see actual against expected, I guess this could be easily measured at idle as it should be exact if the car is sat on the spot.

The issue with looking at live data from VCDS is you are going to see what the sensor is reading. If it goes out of spec which I suspect it will as it logs a fault you still won't know if it's the sensor reading incorrectly or if the pressure is too high.

You should be able to go into advanced measurements and select fuel pressure from the tick list.

Thanks Tech1e, I'll hook it up and take a look. I think perhaps I'll see if I can pick up another sensor and take readings from both to see what I can rule out. Is the sensor the one to the left of the fuel rail?