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1

Omega General Help / Re: 2.2 Omega CD Auto, to stall or not to stall.

« on: 05 July 2015, 12:47:34 »

Thanks for all of your suggestions, taking them in order, firstly to 'The Boy', no I have not cleaned the throttle body, and I will follow the guide explicitly when I do, I am usually to be found in Stoke Bruerne where my boat is or a my elderly mother's in Kingsthorpe. In either case not a million miles from Brackley.
To BazaJT, Rob G, seems to have answered that one. Finally to Sir Philbutt, I quite like this suggestion as a first port of call, as I said this fault appears intermittent, which may be a partial blockage. I will investigate that first, then the throttle body cleaning. As an endpiece I can now report that my mechanic friend plugged in his Snap On box of tricks and read the codes, 2 were related to Lambda Sensor faults and 2 unspecified, after clearing the codes he suggested I went for a short drive, upon returning he plugged in again and scanned for faults, came back with rich mixture at tick over. Could this be a faulty sensor sending a 'duff' message to the ECU?
Anyway many thanks to the respondents, I will report back when I know more.

2

Omega General Help / 2.2 Omega CD Auto, to stall or not to stall.

« on: 04 July 2015, 12:57:42 »

Hi to all fellow owners, I was wondering if any members had experienced a similar problem to that I am experiencing.
My Omega starts on the button first time and will sit quiet happily ticking over for long periods. It runs well out on the open road at all speeds, but just recently has developed a strange intermittent fault. When slowing to stop at a queue of traffic, roundabouts, traffic lights etc., the engine will either, 1) behave normally or 2) stall completely, or more worryingly 3) almost stall, at which point it would appear that an anti-stall device kicks in and the revs raise by 500 to 1000 rpm, which being automatic causes the car to lurch forwards or backwards if reversing! the only other thing I've noticed during my one year tenure of this car and more recently is that the throttle has always been 'laggy', but even more so when this fault is apparent. Can anyone shed any light on this please? My questions are 1) does the car have an anti-stall device/ 2) Does the throttle have any type of electrical input/output control?
Thanking you in anticipation of your responses, Alan

3

Omega General Help / Re: Omega 2.2, Blown Head Gasket Symptoms?

« on: 10 December 2013, 15:41:46 »

My Omega update, firstly thanks to The Mad Mechanic for the offer of his and Webby's help if I get stuffed. This should be of interest to 'Guffer', 'Sir Philbutt' and JamesV6CDX.
Seems like I may have found cause of my misfire as this pm I remove the coil pack as per Sir Philbutts suggestion to find that I had oil around the bottom of all plug holes, with noticeably more around No  4 cylinder. Upon further inspection I noticed that the rubber 'johnny' that shrouds the contact spring and plug was split in two places and duly fell apart during examination! I have temporarily swopped it with No 1 cylinder and if the misfire persists and is 'fault read' as being at cylinder No 1, I'm sure I could rule out a fault with the coil pack, which would be nice as I've been quoted £110+ for a replacement! So, just two things to ask, Are the aforementioned rubber 'Johnnies' available as a spare part? AND Does anyone have a good tip or trick for cleaning up oil around plug bases, as I don't want to remove plugs (yet) and wash the oil along with any debris down inside the heads. Did consider washing out with a liquid that will evaporate itself dry, say Iso Propyl Alchohol. Any ideas would be welcome and thanks again for everybodies interest, make me feel like I bought the right car and joined the right forum!

4

Omega General Help / Re: Omega 2.2, Blown Head Gasket Symptoms?

« on: 09 December 2013, 18:33:07 »

  Well as promised an interim update on my Omega issues.
Firstly thanks to all who offered advice and solutions, it would appear as suggested by some that I have two concurrent problems. 1. A slight loss of coolant fluid. And 2. An intermittent miss-fire. As I finished work on-time today I popped down to see my mechanic. Whom I've used down the years for jobs I can't manage. Having described the symptoms to him, he connected a Snap On diagnostic box of tricks, he programmed the vehicle details, run a diagnostic check,  cleared the resultant codes and run again. Results show I have a misfire on no 4 cylinder, so at first opportunity in daylight I will be checking coil / plug for condition and oil / water ingress. Just one thing to ask Sir Philbutt, am I mis-understanding your advice here  "you shouldn't have to disconnect at the back as it's awkward if not used to doing it." Am I to disconnect it at the back or not? As for the water loss, I shall be monitoring all the usual suspect places ongoing.
Once again, much gratitude to you all for your advice.
JamesV6CDX, I'm located in Northamptonshire, although my job takes me all over the UK, but not in the Omega!

5

Omega General Help / Re: Omega 2.2, Blown Head Gasket Symptoms?

« on: 05 December 2013, 23:57:02 »

Hi Guffer, Many Thanks for your input, I'll get those things checked out early next week, (I'm away this weekend without the car) and get back to you with my findings, good point you make about oil round plugs/coil. Thanks again, Al

6

Omega General Help / Omega 2.2, Blown Head Gasket Symptoms?

« on: 05 December 2013, 22:09:57 »

Hallo Omega owning friends, I was wondering if any others owners have had blown head gasket/cylinder head problems with this model?
I have only owned the car a month, having replaced an ageing Rover 214 Sei, with a corroded cylinder head with this two owner from new, full service history, 135k miles Omega. It wasn't really what I wanted but the car is very clean and was running superbly. However on Monday last I noticed the car was misfiring slightly, and the engine management light on the dashboard came on, together with the low coolant level warning text. I duly checked the coolant and topped up to correct level, noticing that the tank seemed quite pressurised. The next morning the car ran impeccably until, when halfway to work, some 5 miles the misfire began again, seemingly corresponding with the thermostat opening fully perhaps. I duly got to work and left the vehicle until later that day. I again had to check the fluid and topped up again but decided to leave the pressure cap just 'unlocked' for the journey home. The car ran OK all the way home, with the exception of a waft of steam emanating from under the bonnet when stationary. I am of the opinion that I have at best a blown cylinder head gasket or worse still a cracked head. I have checked the oil and oil filler cap, absolutely no sign of 'mayo'. Any advice would be most welcome as I said previously I have only owned this vehicle for a month.