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Discussion Starter #1
Now I need some advise
Been having problems with my 1.7 cdti astra j the problem being keeps going into limp mode!
Iv had codes
P000F
P228A
Both of these were cleared and never come back
Then I had code
P088 fuel rail
Sent car to a diesel specialist as couldn't clear the code he went through while car changed the rail and pressure regulator on the rail and updated the software and car was all good again
Been out today and car back in limp mode this time with code : p0089 fuel pressure regulator performance so been to the dealer bought a new regulator and fitted it tired to clear the falut and instantly goes back into limp mode.

Now Iv had the injectors checked and was told that there were fine
Pump been checked and that's fine
Fuel filter has been changed
All the fuel lines are fine aswell

So am I now looking at a working issue?
Could my ECU be on the way out?

Do these cars have any problem of water ingress into the fuse box?

Any ideas in where to have a look at would he great ither wise the bloody thing going to the scrappy

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Discussion Starter #2
Been doing some research Into possible causes of this.
So thought I'd give people a insight Into to how things r with the car
The car always starts first turn of the key and idled fine nice and steady
Car will rev to 3,5k sometimes more but rises very slowly

My question is has this car got 2 fuel pumps being a diesel?
1 high pressure fuel pump in the engine and 1 in the tank?
If it does have one in the fuel tank what is its purpose? Would if it was failing or blocked cause the car to go to limp mode?

It's getting ti the point where I dont trust the car as u never know when it's going to happen as each time it has happened to has happened when I'm higher on the rev range doing over 40mph and when it goes into limp mode things can get hairy rather quickly

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The intank lift pump lifts the fuel pressure up a tad as the fuel makes it’s way up to the high pressure pump.
If the intank lift pump is failing , the bits inside can travel up the fuel lines leading to the random cutting out of engine.
 

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Discussion Starter #5
No it the one on the end of the rail as I was told by the guy in the vauxhall department that it would be that one why is there one on the pump itself? Do u happen to have a picture of that one?

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Search on eBay. Vauxhall 1.7 Cdti fuel pressure regulator control valve. For some reason I can put pictures on.


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Discussion Starter #7
Ah yes I have search for it a it looks like what I thought was the svc on the pump could that be what is the regulator?


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Yes scv valve it took me a while to work it out but mine was making an odd noise and when I changed the fuel filter it went away but then came back after a month. I found it when it was over pressuring so I changed that and problem sorted. Used to cut out when you let off the accelerator but keep the revs up was fine then would go in to limp mode every so often.


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Discussion Starter #9
Right well going to take a look at it today dont think il be able to tell anything from taking it off by got nothing to lose.
Its frustrating that one min car is going great pulling through all the gears like a train then bomb limp mode

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Do you know exactly which 1.7 engine this is,DTJ,DTR etc ?
The code P0089 is an overpressure one although it looks as though it may be real overpressure or false due to a wiring resistance issue.
here's an extract from the diagnostic:

The ECM detects that the fuel rail pressure is above the maximum threshold while the
pressure is controlled by the fuel rail pressure regulator
• High Resistance in either circuit of the Fuel Pressure Regulator 2 will cause a DTC to set.
• There are no driveability concerns associated with the fuel rail pressure regulator unless a DTC is present.
One of the causes of these DTCs is a sticking fuel rail pressure regulator.

• If the fuel system pressure is actually too high, a fuel knock and smoke condition will exist.
 

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Discussion Starter #12
What does it mean by dtc status invalid?
Cause iv cleared the falut but it remains on the diagnostics


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Discussion Starter #13
I dont the engine code all I do no is that's it's a 2013 1.7cdti 130


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Discussion Starter #14
Iv been talking to a few people I know in the trade about what's the best thing to do with this car 1 has said that from everything that been carried out and no "true falut" being there apart from the software then possibly I have a ECU problem such as a bad connection or water ingress?

Another has said that it 100% a bad pump that's causing it?

Tbh both are very expensive and it may be a deal break as the car has done 89 000 miles in a 13 plate and right now I dont have the money to fix it so it may he broken for spares or just pure scraped in

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The SCV on the fuel pump helps to control the pressure in the fuel rail by reducing the amount of fuel going into the pump. If it's defective, or sticking, it's possible that is causing your problem.
If the pump is providing too much pressure, then the pump itself must be working correctly, so it's the control of the pressure that is likely to be the problem.
If it was mine, I would be changing the SCV as the next thing to try.
No way would I be scrapping a tidy car at that age & mileage!
 

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If you do decide to change the SCV do not buy one from eBay for around £50 because they are sh*the! I had two of them, one of which actually fell to bits on the engine.
I ended up buying one from a Vauxhall dealer and instantly all the faults were sorted.
 

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Discussion Starter #17
The car itself is in fantastic condition I would hate to scrap it but it become a nightmare to own and enjoy

Iv had this svc off the car and by the looks of it it's not original to my car isn't even branded so do people think may be on it something if so anyone got a part number for the original?


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Even my genuine Vauxhall supplied one is not branded.
Your one though does look very like the fake I had on my car.
It also looks like the long version of the SCV, which is used on the Denso fuel system, whereas I would have expected your vehicle to have the Bosch fuel system, which uses the short version of that valve.
 

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Is the SCV presently on your car or have you removed it today?
 
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