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[feeutfo]

glad its sorted amba. Any signs of carbon scoring on the insulator?(white bit) usually a give away.

[amba]

Thanks Chris....the passenger side plugs looked like they were starting to rust !!! as were almost under water...when I pulled the  rubber plug cap off the plug it had a gluey creamy mess on the end ,which I managed to get most out of the plug well with the aid of  kitchen tissue and a wooden kebab stick( now part of the genuine Omega toolkit).
They looked really degraded when removed although the electrode tips were only really black,which I imagine was from the unburnt fuel,hence the reason the fault code pulled up oxygen sensor.
The thing that really puzzles me is why the plug wells were filled with water....I have owned this car for over 4 years,but have previously had a mechanic do the repairs ,but with current economics am going the DIY route,which I quite enjoy and the feeling of sucess is well worth the cuts and bruises.

[Kevin Wood]

Have you perhaps got a drip from the join in the scuttle cover into the plug well?

Kevin

[amba]

Good point,Kevin.I will tape over the joint with some Duck tape...strange its never had that problem before and scuttle has been on/off numerous times in the last few years.

[feeutfo]

rust is the other clue.

There have been a couple of threads re leaking scuttle. From memory, even bathroom or silicon sealent didnt stop the water coming through.

My old 2.5 leaked, i noticed the drips when working on the car in the rain. Never got on top of the plenum or engine though. But rust means water, and scuttle most likely, unless you drive through a ford or flood of some sort?

Also see if the windscreen seal is still attached to the screen. If the scuttle is attached to the seal it can still leak if seal is adrift of the screen. But thinking about it you may well have noticed that when replacing the dis pac. Hth a bit.

[Tony H]

Good news glad you sorted it.

[amba]

Chris...I had a chat with Daz this afternoon and he suggested the scuttle panel could be leaking,and advised sealant around the washers where the wiper shafts pass through the plastic part.
I think I will get a couple of large rubber flat washers and cut and then apply cam cover sealant around them and fit to scuttle that way the only place water that runs off the screen can go is to the scuttle ends and drain away down the end  holes.
The miss fire started last Sunday morning and seem to recall car stood all afternoon on Saturday in heavy rain,but only on the drive where it is usually parked.
Maybe it was just one of those things and plugs had been soaked before as indicated by the rust and the last soaking had been the final straw.Anyway it has been resolved and car has a nice new dispack and 6 brand new plugs so better look on the positive side,and will have a closer look at sealing things up next week .
I hope you all have a good meeting on Saturday...I would have liked to attend,but work has been scrappy as of late and needs must as they say,so it is work all weekend for me.

[Alldi]

The lesson is always check the simple things first. However I did the same thing when I first bought my Omega, replaced DIS pack, then leads and only when I went to replace the plugs that I found they were sitting in alot of oil and this I believe was causing the misfire I was suffering, once bitten twice shy

[amba]

Alldi...strange thing was it was the water that must have been causing the misfire,but would have expected the heat from a running engine to have caused the water to evaporate.As said nearside side was like a swimming pool...only a very small trace of oil on center and closest to front on drivers side which I can,t see was the problem.
Anyway good news was car drove nearly 200 miles today without missing a beat in storm conditions ,so looks like all sorted out.
Sure I think there is a slight air leak so will go searching for that when weather improves.

[CaptainZok]

I bet your car is parked downhill on your drive.
I've had this occasionally when the car has been stood for a week or two in rainy weather and No6 fills with water.
Solution is to mention it to my Gnome who runs out with tools and the airline to strip down to the plugs and blow out the water from the plugwells.
I've only heard of it happening on facelifts before though.

[amba]

Car is always parked down hill on driveway as its easier to get off in the morning,but I have been doing that now for lots of years with no previous problems.
Can only think rain was very heavy last Saturday night and maybe the scuttle had not been put back quite correctly the last time it was taken off....but on further thoughts all 3 plug holes were underwater not just the nasty no 6,so water would flow uphill to that one unless camcover was nearly all under water and the only place left to go was down the plug holes(so as to put it).But that following day I drove 80+miles with a very rough running car so would have expected the water to evaporate with the engine heat.
Trouble is I can go mad trying to work out why the water was there...just hope it doesnt happen again...I have ordered a couple of 60mm syringes and will make up a tube on the end in case I need to perform dyna-rod again.

[Jamin]

I've had my Omega just over three weeks with a missfire and have found fresh water in the plug holes, I eventually discovered the sound proofing sponge under the scuttle was full of water, squeezing it showed up several holes in the sponge covering where the water would have dripped out, one hole was right above the dispack,  after removing the sponge to dry out the missfire went away. I also park facing downwards.