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[mkaminski100]

As I said before: NO fault codes, new thermostat (engine is getting to 90 degrees after 10-15 minutes and is keeping this temp).  
I want to do a TECH2 check but just don't want to pay 40 pounds in Vauxhall to be told that "it's all OK, no faults, no error messages".

[cem_devecioglu]

As I said before: NO fault codes, new thermostat (engine is getting to 90 degrees after 10-15 minutes and is keeping this temp).  
I want to do a TECH2 check but just don't want to pay 40 pounds in Vauxhall to be told that "it's all OK, no faults, no error messages".
 

Hi,
10-15 minutes for 90 degrees is really long..Possibly you are in a very cold climate..Here in Turkey I remember last winter after thermostat change even in the morning with -7 celcius or -8  the engine reaches to 90 on the road within 3-4 minutes..
But in cold winter my normal 11.5 - 12.5 liter/100 consumption reaches 13.5-14 which are closer to your figures..(13 km road of which 1/3 is start stop traffic..and cold engine..


ps: mine is 2.5 auto 82 K miles..Also autobox condition can be important in that consumption

[mkaminski100]

I don’t think that the engine can reach 90 degrees in less then 10 minutes (It takes few minutes to boil a litre of water). I am thinking about morning start when the outside temp is about 3-5 degrees.
If your consumption of 11,5-12.5 in city is calculated from petrol and not from computer then your car needs less than my Vectra 2.0 manual...
Oh, yes, condition of autobox is very important but is there any way to check it? Mine works fine and oil was changed recently (together with filter)

[theowletman]

Take the spark plugs out, if they are black and sooty your fuel mixture is too rich, they should be a light grey colour if all is well and running correctly. As I have said before ask a friendly MOT station to do an emissions test, our local station charges us £5 to do this test, it will tell you C02, lamda, hydrocarbons etc. This test is a lot cheaper than a diagnostic Tech 2. The Tech 2 is only as good as the person operating it, emissions test is so easy I could do it!!!

[cem_devecioglu]

I don’t think that the engine can reach 90 degrees in less then 10 minutes (It takes few minutes to boil a litre of water). I am thinking about morning start when the outside temp is about 3-5 degrees.
If your consumption of 11,5-12.5 in city is calculated from petrol and not from computer then your car needs less than my Vectra 2.0 manual...
Oh, yes, condition of autobox is very important but is there any way to check it? Mine works fine and oil was changed recently (together with filter)

my consumption mostly is dependent how much  I'm in hurry

the consumption figures is from the computer itself but I've managed to drop this below 10l/100 km
at the same route (home to job) with a grandma driving style (summer)  

From what I've read on posts the check can be done by looking the small grindings and pieces in the autobox filter (basic-checked mine during filter change) ..However an experienced autobox specialist can see its condition with a 15 minutes driving..Or an omega owner who owned from 0 km..

This 10 minutes for heat up can only be in idle I think ..Still very long.. :-/

Sorry may be these dont help much..But still I think you have problem with thermostat..Did you changed CTS also ?

Edit: my highest consumption change occured with blanking the EGR , changing lambda sensors and changing exhaust completely..May be this will give little idea..

[mkaminski100]

Sparkplugs are white like new. I bought them just before selling my Vectra and put them in Omega. They were a "cappuccino" colour (when taken from Vectra) then and after few hundreds of miles become white. Sparkplugs are genuine GM and are for this engine.
I assume that it's ok but anyway will have to do the emission test.

[Marks DTM Calib]

If you hold S and R pressed on the fuel computer stalk, what numbers appear in the MID display.

[mkaminski100]

I will check my computer today. I did that before but just forgot to write down these numbers.
I’ve checked the filter and oil sump and there was nothing suspicious. No plastic pieces, nothing. Oil was clear (not as new but clear). There was a little bit of grey mud on the magnet but I was told that it’s ok when oil wasn’t changed from new.
When the engine is cold and I will press a full throttle, revs goes up together with speed. No clutch sliding. No “Christmas tree” on gear indicators. Only thing that bothers me is that it can change a gear just after depressing the throttle pedal. Friend of mine told me that every 2.0 does that.
My engine goes to 90 degrees in 10 min when in idle, but it takes 15 minutes in the morning. I drove another Omega and my old Vectra (with new thermostat from Wahler) and this time is always above 10 minutes. I know what you mean, and I can tell you that my thermostat is ok. It’s much better than my old one.
What is CTS?
I’ve unplugged the air hose from my EGR and when trying to open it (using screwdriver) engine goes crazy.  (Revs goes down and it starts shaking)
Lambda sensor was changed. It’s not new, but there was no change when the old one was replaced (no better, no worse). I think that the elastic joint between that double pipe and catalytic converter might be worth to change, but I’m not sure.
Problem with Vauxhalls is that it usually takes some time between fixing something and reducing consumption. ECU needs to adjust and or you can just wait or reset it and find that the consumption will go up for some time (in “adjusting” mode).
But still I like them to much to change it…

[cem_devecioglu]

CTS coolant temperature sensor..This gives the info to the ECU the coolant become hot and diminish the fuel amount in the injectors.But white sparks cancel that theory I think..

dont know how 2.0 EGR is but sure can be blocked by a thin metal ..Really worth checking may be stuck..

[mkaminski100]

Numbers from MID: 012 3 24060.
I know how to check the sensor and will do it as well.
Don't think the EGR might be stuck, as I was was opening it wit a screwdriver and could see the engine reaction. AS soon as I left it, engine back to normal again.

[Craig_R]

CTS coolant temperature sensor..This gives the info to the ECU the coolant become hot and diminish the fuel amount in the injectors.But white sparks cancel that theory I think..

dont know how 2.0 EGR is but sure can be blocked by a thin metal ..Really worth checking may be stuck..

I have got my money on the Coolent Temp Sensor being knacked like it was on james old 2.0l 4 pot that was drinking fuel he said it was much better after he changed the coolent temp sensor

[cem_devecioglu]

CTS coolant temperature sensor..This gives the info to the ECU the coolant become hot and diminish the fuel amount in the injectors.But white sparks cancel that theory I think..

dont know how 2.0 EGR is but sure can be blocked by a thin metal ..Really worth checking may be stuck..

I have got my money on the Coolent Temp Sensor being knacked like it was on james old 2.0l 4 pot that was drinking fuel he said it was much better after he changed the coolent temp sensor

Agreed.Only this white sparks mess up the theory..

[Craig_R]

get a [size=20]GOOD [/size]photo of the spark plug end to let us see the colour of them

[mkaminski100]

As requested
http://picasaweb.google.com/kaminski.marcin1/Swiece?authkey=ItD9bBnx6DY
They are not as clean as they were after long trip, and every one is darker on the one side and almost white on other.  I was just doing few miles a day from Monday is it might be a reason why they are black on one side.
So what do you think?

[cem_devecioglu]

this monday I see my sparks..Not similiar ..Yours are not totally black but sure darker than mine (7 K miles usage)..I dont think they are white..

Lets see what other members think.. :-/