Vauxhall Owners Network Forum banner

1 - 20 of 129 Posts

·
Registered
Joined
·
67 Posts
Discussion Starter #1
Hi Guys,

Hopefully someone can help me with this problem.

We have a 2012 Zafira 1.7 cdti eco flex.
Problem we have the car tries to start and then cuts out straight away.
We have changed crank shaft sensor, fuel rail pressure sensor, in tank pump, another sensor which is the same as the crank shaft sensor but located elsewhere, fuel filter changed.

The problem started a few weeks ago, car was driving fine then just cut out, got it running again it drove for a few miles and cut out again and has never started properly again.
It fires up and then instantly dies.
Engine been tested and they have said they can't find any problems why it wouldn't run.

Any ideas it's covered 123k on the clock, serviced regularly, cam belt done 13000 miles ago. Really need to find whats wrong with it as it's a taxi

Any help would be great
Thanks
 

·
Premium Member
Joined
·
1,948 Posts
I assume you have had the car scanned with a compatable scanner (most scanners will not give proper results on Vauxhalls, you need an opcom or Vauxhall Tech2 for reliable results).
You appear to have changed the usual suspects, but I would suspect the suction control valve on the high pressure pump.
If you do get this changed, make sure it's a genuine part, not a cheap chinese copy.
 

·
Registered
Joined
·
67 Posts
Discussion Starter #3
I assume you have had the car scanned with a compatable scanner (most scanners will not give proper results on Vauxhalls, you need an opcom or Vauxhall Tech2 for reliable results).
You appear to have changed the usual suspects, but I would suspect the suction control valve on the high pressure pump.
If you do get this changed, make sure it's a genuine part, not a cheap chinese copy.
Yes and finding no faults. Suction control valve has been changed for a genuine vauxhall part, vauxhall are now advising it could be inlet manifold that;s block so thats coming off as we speak. The are also saying it could be the Idle Air Intake Control Valve ?? Everyone seems to be banging there head at what this could be.
Engine will fire up but instantly cuts out. all parts have been genuine vauxhall
 

·
Registered
Joined
·
67 Posts
Discussion Starter #4
I assume you have had the car scanned with a compatable scanner (most scanners will not give proper results on Vauxhalls, you need an opcom or Vauxhall Tech2 for reliable results).
You appear to have changed the usual suspects, but I would suspect the suction control valve on the high pressure pump.
If you do get this changed, make sure it's a genuine part, not a cheap chinese copy.
I should also say the car has been to an engine specialist and they say there is nothing wrong with the engine all injectors have been tested and are fine
 

·
Super Moderator
Joined
·
25,366 Posts
It needs hooking up to live data to see what’s causing the engine to shut down even though it started up fine.
I had this exact problem on my other Astra & it turned out to be a failing MAF sensor , once replaced no more cutting out after engine started up.
 

·
Worn Out Member
Joined
·
5,135 Posts
I wonder if they confirmed the throttle body isn't snapping shut after starting ?
 

·
Registered
Joined
·
67 Posts
Discussion Starter #7
It needs hooking up to live data to see what’s causing the engine to shut down even though it started up fine.
I had this exact problem on my other Astra & it turned out to be a failing MAF sensor , once replaced no more cutting out after engine started up.
Vauxhall say it's all been done, and can't find a fault
 

·
Registered
Joined
·
67 Posts
Discussion Starter #8
I wonder if they confirmed the throttle body isn't snapping shut after starting ?
Throttle body has never been mentioned. At present the inlet manifold is being removed as they say that could be the fault. £1500 so far has been thrown at this fault and we are no further forward.
 

·
Premium Member
Joined
·
1,948 Posts
Vauxhall say it's all been done, and can't find a fault
Unfortunately, most people on this forum would not trust dealers as far as they could throw them.

You say it's all been done, but have you actually seen what they do?

And, as regards dealers using their scan tools, most of them simply don't know how to interpret the readings.

Where abouts are you, there may be a helpful forum member with opcom near you who would be able to scan the car and diagnose the problem for you, or someone may be able to recommend a trusted local garage.

Please let us know the outcome, and what the trouble was when you eventually get it fixed.

Good luck.
 

·
Well-known member
Joined
·
11,771 Posts
Has this engine actually got an "Idle Intake Control Valve? Diesels run at full throttle as far as air goes, it is the fueling that regulates speed.
 

·
Registered
Joined
·
67 Posts
Discussion Starter #11
Has this engine actually got an "Idle Intake Control Valve? Diesels run at full throttle as far as air goes, it is the fueling that regulates speed.
Our local Vauxhall garage has said yes and ordered that part in but then another Vauxhall dealer has said it doesn't have one. This is the problem we have no one can say whats wrong they are just saying it could be this it could be that and costing us a bloody fortune while they scratch there heads
 

·
Premium Member
Joined
·
1,948 Posts
Has this engine actually got an "Idle Intake Control Valve? Diesels run at full throttle as far as air goes, it is the fueling that regulates speed.
I think Valer was refering to the "anti-shudder" valve flap, that should close when the ignition is turned off. As you say, these don't have a throttle flap as such, they should have a clear air intake when running.
Our local Vauxhall garage has said yes and ordered that part in but then another Vauxhall dealer has said it doesn't have one. This is the problem we have no one can say whats wrong they are just saying it could be this it could be that and costing us a bloody fortune while they scratch there heads
As I said earlier, most dealers are clueless when it comes to diagnosis, they just throw parts at a problem without knowing what is actually wrong. You need to find a good independant, who has the right skills and equipment.
If you tell us where you are, you may get some more constructive help.
 

·
Well-known member
Joined
·
11,771 Posts
I was questioning what the OP had been told by the dealer. I bet they actually mean the anti-shudder valve and have used the wrong name.
Though to order one in sounds like they either haven't bothered checking it and are just going to try a new one or they have checked it and it is faulty.

Very easy to check though, just pull the boost hose off and start the engine and watch what the flap does.
 

·
Premium Member
Joined
·
1,048 Posts
How long exactly after firing up does it die, and what color is the exhaust gas when it comes out the tail pipe? presuming they took the inlet manifold to look at the swirl flaps? no mention of the infamous EGR valve but surly that must of been ticked off the list.


As said, trawling through the live data during the start and stall process is going to give you the best chance of spotting something, find yourself an indy or mobile mechanic with plenty of good reviews. If you're spending money on parts and the vehicle isn't actually being repaired, you're at the wrong garage.
 

·
Worn Out Member
Joined
·
5,135 Posts
I was questioning what the OP had been told by the dealer.
I bet they actually mean the anti-shudder valve and have used the wrong name.
That's why i suggested checking the throttle body,although it's proper name is anti-shudder valve Vauxhall always refer to it on TIS and EPC as the throttle body and i find most people not in the trade understand that reference,
my other thought was they may have been referring to the swirl flap vacuum actuator,but it's all guesswork
 

·
Well-known member
Joined
·
11,771 Posts
But even a stuck swirl flap actuator wouldn't cause the engine to cut out after a few moments.
Mine decided it didn't want to bother pulling the swirl flaps anymore and took a 2 week sabbatical then mysteriously started working perfectly again ever since.
 

·
Super Moderator
Joined
·
25,366 Posts
With no diagnostic trouble codes to guide you it’s purely a game of guessing which part or messing about with parts that don’t need mucking about with.
Has it been checked for the dreaded diesel bug in fuel tank ?
 

·
Worn Out Member
Joined
·
5,135 Posts
But even a stuck swirl flap actuator wouldn't cause the engine to cut out after a few moments.
Mine decided it didn't want to bother pulling the swirl flaps anymore and took a 2 week sabbatical then mysteriously started working perfectly again ever since.
I know,but it does look as though they may be clutching at straws a bit with this one
 

·
Registered
Joined
·
67 Posts
Discussion Starter #19
How long exactly after firing up does it die, and what color is the exhaust gas when it comes out the tail pipe? presuming they took the inlet manifold to look at the swirl flaps? no mention of the infamous EGR valve but surly that must of been ticked off the list.


As said, trawling through the live data during the start and stall process is going to give you the best chance of spotting something, find yourself an indy or mobile mechanic with plenty of good reviews. If you're spending money on parts and the vehicle isn't actually being repaired, you're at the wrong garage.
You turn the key it fires then stops. You then turn it over again and it sounds like the cam belt has gone but it hasn't. The EGR has been done. Vauxhall have done the live data. It has been to an engine specialist and they report there is nothing wrong with the engine. This is what i mean all diagnostic are saying there is nothing wrong with it
 

·
Registered
Joined
·
67 Posts
Discussion Starter #20
With no diagnostic trouble codes to guide you it’s purely a game of guessing which part or messing about with parts that don’t need mucking about with.
Has it been checked for the dreaded diesel bug in fuel tank ?
do you mean contaminated fuel when you say diesel bug ??? if so it's been tested
 
1 - 20 of 129 Posts
Top