I had the same problem on my 1999 Omega V6.
It was looked at by several people and no-one could seem to find the reason for it happening. In the end, I removed the accelerator cable (which includes the kickdown switch for the auto box, located near the bulkhead), and took apart and cleaned the kickdown switch (the small rectangular black box) This solved the problem completely. I would suggest that if cleaning does not work, then the cable (including kickdown switch) be replaced. Hope this helps P.S. For more info and help with anything related to the Vauxhall Omega, try www.omegaowners.com
On a Vauxhall Cavalier Ecotec 2.0L, the timing marks are located on the front of the crank pulley. It is marked under the cam.
check spark plugs and coil pack
5w-30 fully synthetic. Just phone a Vauxhall dealer, and ask them.
If you can't see it on the fuel rail,then it's in the tank with the pump.
There is not a dipstick its a sealed system
GM Ecotec family engines have timing CHAINS, not belts.
where is the ground wire on a 2006 chevy cobalt 2.2 ecotec motor
Stock Spark Plug gap for the 2.2 Ecotec (no Boost) is .045 inch
Yes
Saturn ION 2.2 L ecotec engine has a top speed of 78.6 mph which is fairly fast.
120hp
Yes