just got my car back on road friday and its rocking when ticking over and the revs are jumping,its like a bag of nails its ok when your driving along temp is fine but when i stop in traffic or somthing the temp shouts into red and overheats i no the hbv is leaking coolant and the vac pipes need doing is this the problem?or something else

'rocking when ticking over'? sounds like a misfire on one or more plugs. Check for water or oil in the plug wells & also for correct plug torque. Look at the plug caps & check the rubber is sound with no splits/cracks or bits missing as this can cause spark tracking & misfire. Have a read of the ECU to check for stored codes:-
http://www.omegaowners.com/forum/YaBB.pl?num=1189022687


If you have vacuum leaks then there is a better than even chance this is the cause of the uneven revs, & the leaking HBV needs seeing to asap if you are losing a regular & noticeable amount of coolant! Keep an eye on the level & don't allow it to fall too low or you will get air locks in the system & overheating. :y

benjy44 wrote on 13. Feb 2011 at 11:58:

just got my car back on road friday and its rocking when ticking over and the revs are jumping,its like a bag of nails its ok when your driving along temp is fine but when i stop in traffic or somthing the temp shouts into red and overheats i no the hbv is leaking coolant and the vac pipes need doing is this the problem?or something else

Are the twin fans coming on when the temperature rises as you are stopped with no natural air flow? :-/ :-/

yeah fans are working