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[abuali]

When I start the engine , sometimes it is running perfect. But sometimes the engine seems to be ok until I put my foot on the accelerator and there is no power, particularly when I am pulling away at a junction. So now I test my car always by stopping on a by-road and pulling away, if missing , no power, I stop the car and switch off ignition. I then start the car and pull away , normally this works first time and car is normal power, sometimes I have to stop and start twice. Once car is running it is ok for ever until I stop and start car. And I have to go through same procedure. This happens whether car is hot or cold. Went to a small garage and he tested all and thinks it may be a Lambda sensor, front one. But he is not sure. Went to vauxhall he said it willl cost money, a lot to try and find the fault. Milliage is 53000.

[ffcgary1]

You need to post up the fault codes for us to help you more,
 see the maint guides to reading the fault codes on the 2.2

[tunnie]

Can you get codes read?

Worth trying pedal test here: http://www.omegaowners.com/forum/index.php?topic=90581.0

Not many 2.2's work though for that, so might need a cheap code reader.

Start off with basics, have you checked the plugs for oil/water?

Any dash lights on?

[abuali]

I do not have fault codes, but once car would not start and RAC told me there are a few fault codes showing. 1 . Lambda sensor 2. Cam sensor.
My engine management light is always on but car once running is great.

[RobG]

I do not have fault codes, but once car would not start and RAC told me there are a few fault codes showing. 1 . Lambda sensor 2. Cam sensor.
My engine management light is always on but car once running is great.

That will give you definite problems. Worth also giving the throttle body a good clean plus the breather system

[tunnie]

Cam sensor will often cause other random codes, replace with a genuine part, nice easy DIY job