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[xkenny1]

hi was wondering if anyone cud advise me
omega-b 2.2 auto petrol 2002 original fault was intermittent bad starting and sometimes lacked power.had it diagnosed at locsal garage they replaced cam sensor since then i have no throttle. when in neutral or park revs upto 4,500 rpm then gets lumpy but as soon as i put it into drive  i have very little throttle now at my wits end can anyone help please.

[henryd]

you need to get the codes checked again   http://www.omegaowners.com/forum/YaBB.pl?num=1189022687  although pedal test may not work on yours

[hoofing it]

you need a tech2 to read codes on the 2.2
where about are you to see if somone on the forum has a tech2 close to you

[charlie]

I would try it with the maf unplugged,see if that makes any difference.The reving in neutral then not in drive is a sign of a broken one.

[dbug]

I would try it with the maf unplugged,see if that makes any difference.The reving in neutral then not in drive is a sign of a broken one.

Agreed - try with maf sensor unplugged. If then ok can drive as goes to default settings.  New maf sensor then required.

[tunnie]

Two most likely culprits, cam sensor or MAF. As mentioned unplug MAF, and see what happens, you do really need to get codes read, do you know if they used a genuine GM Cam Sensor?

[xkenny1]

thanks for the info guys im in consett co.durham
will try maf sensor

[xkenny1]

please forgive the ignorance but where/which is the MAFsensor thanks again ken.

[Vamps]

In layman's terms it is a solid bit of plastic fitted in the flexible air intake pipe, a square section in the middle with an electrical plug, remove this and see what happens. 
I also had the same problem and it turned out to be the Crank sensor, having tried changing the MAF.
If you get stuck there is an auto electric place in Ferryhill (Just can't quite think of the name, but have used them a few times) that can identify all these type of problems and fix them at a reasonable rate..