still having trouble

[paulcodurham]

hi im still having turbo trouble with volvo s40 54 red 2.0d.

soon as the cars started with out reving up the engine the turbo seems to open soon as engine starts and does not close (actuator opening)

then when driving the car there just isnt any boost and goes into limp mode, any advice please

[SonyVaio]

I would have all your boost hoses and intercooler checked for rips, tears and leaks.

As your getting limp mode I'm sure the car will also be storing an error code too. Have you had the codes read to see if you have any fault codes? This would generally point you in the right direction.

[paulcodurham]

hi, yer checked all hoses and all are fine, i been told it could be a turbo boost valve sensor? had the car on a machine and im getting 2 codes, im not sure what they are p0091 and p120e

[SonyVaio]

Originally Posted by paulcodurham

hi, yer checked all hoses and all are fine, i been told it could be a turbo boost valve sensor? had the car on a machine and im getting 2 codes, im not sure what they are p0091 and p120e

They both point to a problem with your fuel pressure / regulator.

P120E (ECM-120E) Fuel rail pressure (FRF) sensor - range/ performance problem - Probable cause - Poor connection, wiring, fuel filter blocked,
FRP sensor, fuel pump (FP), fuel pressure control solenoid

When was your fuel filter last changed?

Check the wires going onto the fuel pressure regulator (FPR) and ensure they are connected properly.

Chances are that you need a new FPR, if you do get in contact with RUFE for a price (if you don't know who rufe is yet then just ask and I'll post up a link) you will find it hard to get a genuine one cheaper.

[paulcodurham]

hi, had the car services last week, new fuel filtre, also would this cause the turbo not to work?

[paulcodurham]

i have also blanked off the egr valve, the car was still going into limp mode befor i had these jobs done

[SonyVaio]

Originally Posted by paulcodurham

hi, had the car services last week, new fuel filtre, also would this cause the turbo not to work?

Yes, if the fuel pressure is too low it is not delivering enough fuel thus no power and no turbo. Although the no turbo will only be because it is going into limp mode and not because of the turbo itself.

Originally Posted by paulcodurham

i have also blanked off the egr valve, the car was still going into limp mode befor i had these jobs done

Is the EGR completely blanked off or does the blank plate still have a few holes to allow a little bit of flow?

The codes you have got however point to the FPR and not the EGR anyway but anyone who has done an egr blank (completely) has had the going into limp mode.

[paulcodurham]

hi yer the egr has been completly blanked off,

a friend who is looking at the car for me was under it today and asked me to start it up he said the turbo actuator opens rully without revs and stays open, is this still down the the fpr

[paulcodurham]

can i also ask were is the best place to get parts cheap to fix it and do you know roughly as a idea how much it would cost me to fix the problem

[SonyVaio]

On this one I would trust your fault codes as they both point to a fuel pressure problem. I would also (for now) and until you sort this problem out properly, take out your blanking plate as this will not be doing any good at all.

Like I said above everyone on here that done a complete blank of their EGR then their car went into limp mode. I can't see yours being any different?? SO take this out then see how it goes. If you get no joy then you'll have to get the fuel pressure looked at.