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[Lazydocker]

Told ya it's missfiring
 Check the plug wells for oil as said. I had leaking camcovers that leaked outside, after i replaced them they started to leak inside aswell. You should probably change the covers and aluminium ones are best way to go. My plastic covers went fubar at 215000 km and we are in the same enviroment. Take them off and inspect most carefully, if any wavey section discovered throw them away.

Changing to aluminium covers is a cheat. If you clean the breathers properly and only torque to the specified 8nm then plastic covers are fine

[martin341]

Told ya it's missfiring
 Check the plug wells for oil as said. I had leaking camcovers that leaked outside, after i replaced them they started to leak inside aswell. You should probably change the covers and aluminium ones are best way to go. My plastic covers went fubar at 215000 km and we are in the same enviroment. Take them off and inspect most carefully, if any wavey section discovered throw them away.

Changing to aluminium covers is a cheat. If you clean the breathers properly and only torque to the specified 8nm then plastic covers are fine

Not if they look like bananas!

OP, first look for oil in plug wells.

[polilara]

Breathers are clean. Still some thoughts:

Just checked with live data again.

1. All the engine live values remain quite stable when idling rpm drops except the "Ignition Spark Angle". Spark Angle is around 4 when idling normally and when idling rpm drops it can show anything between -5 and +18 until the idling is normal again. Even Dwell angle remains stable. Does this indicate anything?

2. When I accelerate the engine (gear in neutral and car not moving) somewhere 1100 rpm all problems disappear. All values are stable and engine is running smoothly. Same in 2000, 3000 etc. If plug well/coil have problems with oil what does change when revolution increase?

[polilara]

Hello

Does anybody know whether this "spark angle" read by live data tester being anything between -5 and +18 when rpm drops  is a reference value from ECU or actual value. I am still wondering what this all really is as the engine behaves normally in normal drive acceleration is good etc. Only idling problem and some vibration below 1000 rpm.

[polilara]

Took finally coil back 2-4-6 away.

Good news: No oil leak inside so absolutely no oil anywhere. I succeeded with my cam cover change work.
Bad news: Plug well of syl No. six full of clean water, not coolant as not sweet at all.

Rubber sealing around coil back seem to be elongated.

1. Where is the water coming, rain water? How to prevent?
2. Can I buy only these rubbers?

Happy New Year

[terry paget]

Water is coming in through the scuttle. Rain soming off the windscreen is intended to drain down the drain left hand side of the screen, but can leak through central wiper hole or gaps in scuttle and base of screen, then find its way along the spongy insulation to drip into no. 6 cylinder, causing a misfire. There is a guide somewhere on this forum to sealing the scuttle.

[polilara]

Thanks!

I always wondered what is this "Scuttle" you are talking about. Hope someone helps me to find the guide you mentioned.

Are the rubber sealing of coil backs available separately. They should be in good condition as well I suppose.

[Andy H]

Thanks!

I always wondered what is this "Scuttle" you are talking about. Hope someone helps me to find the guide you mentioned.

Are the rubber sealing of coil backs available separately. They should be in good condition as well I suppose.

In the maintenance guide section.........

here Remove wipers and scuttle - with photographs

and here Where to use sealant to reseal the scuttle if it leaks following removal

[polilara]

Thanks Andy H

Happy New Year to You!

[terry paget]

As regards the sealing rubber rings on the top of the coil packs, I have always thought they should keep the water out from the plug holes, but they don't. It may be that that as the hot air inside the coil pack plug space cools down it sucks in whatever is outside; if it is water in it goes. It naturally collects in the plug holes, and after many engine hot/cold cycles enough water is collected to allow the spark to short to earth causing a misfire. Best solution is to stop water getting on top of the coil pack.

[polilara]

Good Morning and thanks for help!

I start the scuttle sealing work today;

1. Understood that no need to renew sealing rubber rings around coil back?
2. In the http://www.omegaowners.com/forum/index.php?topic=128823.0 Doctor Gollum refer to "Right above pot 6" What does this mean?

[terry paget]

I expect Doctor Gollum wll be along shortly. If you open the bonnet and pour water on the screen with a hose or a jug you will see where it goes. It might surprise you; it did me.

[TheBoy]

Good Morning and thanks for help!

I start the scuttle sealing work today;

1. Understood that no need to renew sealing rubber rings around coil back?
2. In the http://www.omegaowners.com/forum/index.php?topic=128823.0 Doctor Gollum refer to "Right above pot 6" What does this mean?

pot 6 = cylinder 6 = the one at the back over on drivers side (assuming Left Hand Drive).

[polilara]

Thanks, yes, Left Hand Drive, so that one where the well is full of water...

[polilara]

Hello again

I think one big problem for this case (water in syl 6 well) is that the wind screen bottom rubber seal is totally loose. I took the whole seal away without any problem. I should now "glue" it back. Do anybody have instructions and chemicals (silicon or whatever) what to use and how. I am working in a warm garage. Seal is washed well like the bottom part of the windscreen, too.