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[albitz]

the rough running sounds very like the usual omega problem of oil leaking from the cam covers into the spark plug wells which causes the plugs to short out and after a while damages the ht leads and then the dis unit.as for the mayo,i did an oil change on my 2.5 recently and found loads of mayo in the filler neck(lots of short journeys),i was also slowly losing coolant , which was solved by changing the heater bypass valve,so i  think you should definetely get a good mechanic to do the test for head gasket failure before having an omega funeral.if the gaskets are o.k. the other problems arent that difficult to solve if you just pick them off one at a time,and speaking from my own recent experience , there is a lot of satisfaction to be gained from getting the car sorted and running sweetly when you were close to sending it down the scrappy.  

[garyv6]

thanks for that albitz! i was at the point of the scrappy but i will defo give that a go! how much does it cost for the heater bypass valve to get done?

[Doodley]

the valve is just over £30 from vaux, there is a replacement guide on here, not a tricky job following the very good guide!

[JamesV6CDX]

apart from this the car is running like s??t aswell! its fine when its cold but as it gets warm it splutters and looses lots of power! when i put it in sport mode and put my foot down its ok in high revs but the autobox dont seem to know where it is!

Have you checked for any fault codes yet?

[star_whites]

Would a faulty dis unit bring up a fault code though???

[Craig_R]

no it would not

[star_whites]

What symtems would a faulty DIS pack cause though?? Interested as I also had faulty cam covers and the pots filled with oil. Already sorted that and replaced the plugs.

[Elite Pete]

What symtems would a faulty DIS pack cause though?? Interested as I also had faulty cam covers and the pots filled with oil. Already sorted that and replaced the plugs.

If you've got a miss fire its more than likely to be the plug leads due to them being bathed in oil.

[star_whites]

Ive not really noticed a missfire but I have powerloss like gary but when you put it in sports it appears to be fine (well up until 60mph then it appears to skip a gear and struggles until it reaches 75

[ffcgary1]

Oil fried leads can cause the dis pack to fail, and cause a misfire when under certain load conditions. Did you change the plugs at the time you did the cam covers and  spray the leads with brake cleaner to remove all the oil. :-?

[star_whites]

I did the cam covers yesterday, as well as changing the plugs and cleaning the leads, but saying that Ive had an oil leak for about a month and the plugs were just about above the oil level so the leads were soaked.