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[2woody]

am in Bristol one night next week - would be pleased to have a look at it

[Broomies Mate]

am in Bristol one night next week - would be pleased to have a look at it

That would seriously be appreciated.  The long tether I normally hold has become extremely short.   

[2woody]

I'll know on Monday when I'm coming. Have to go to a meeting at MoD Abbey Wood on legal issues, will probably drive down the night before and come to you after the meeting is over.

how far are you from ABW ?

[Broomies Mate]

vacuum signal comes from the branch on the idle speed regulator pipe - pull it off the FPR and see if there's vacuum. other than that, you can't really do much else without kit.

how about manifold vacuum leaks ?

or air flow meter death ?

so it's just misfiring at idle only and not when you're driving. Even at low revs / high load ?

I know the EGR valve is leaking 'slightly'.  It blew a couple of bubbles when I jet washed the engine bay a few months ago.  Not related though otherwise it would have misfired way back then.

I have replaced the AFM with a known dodgy one!  The misfire didnt get any worse/better, so stuck mine back on.

Misfire happens every 10-15 seconds on idle, sounds like just a single clyinder not firing but only a tiny blip.  It corrects itself after (what seems to be) a single cycle.

Under HEAVY load, it misfires a lot.  Ease off tyhe throttle and all seems to be perfect.

I'm also using a LOT of fuel.  Average is 17MPH at the moment, it's normally around 25-27MPG average.

[Broomies Mate]

I'll know on Monday when I'm coming. Have to go to a meeting at MoD Abbey Wood on legal issues, will probably drive down the night before and come to you after the meeting is over.

how far are you from ABW ?

About 8-10 minutes down the A4174 Avon Ring Road.  I'd be more happy to pay you for your trouble in either cash or beer. 

[2woody]

could be lambda sensor up the creek.

[Broomies Mate]

could be lambda sensor up the creek.

Interestingly, I had the Exhaust Manifold Gasket replaced a few weeks ago.  Dont know if this would play any part in the problem? Misfire didn't show its face until a week or so after though.

I should have thought (but could be very wrong) that if a lambda sensor was faulty, it would provide an error code?

[2woody]

hmmmm exhaust manifold gasket.....

exhaust sealant is known to poison lambda sensors

the ECU can tell if the lambda has gone open-circuit or if the heater has failed, but it's possible to have one giving incorrect readings without bringing on the mill light. I've just had it on mine.

are you able to measure the lambda output voltage somehow ?

[Broomies Mate]

hmmmm exhaust manifold gasket.....

exhaust sealant is known to poison lambda sensors

the ECU can tell if the lambda has gone open-circuit or if the heater has failed, but it's possible to have one giving incorrect readings without bringing on the mill light. I've just had it on mine.

are you able to measure the lambda output voltage somehow ?

I take it you mean chuck a multi-meter across it, or would it show up on Live-Data through "My Naff Code Reader"?

[tidla]

may be a duff new plug/dropped on the floor gap settings?

[2woody]

live data is better - you got that awailable ?

I could probably bring one of my Omegas down to compare

[Broomies Mate]

live data is better - you got that awailable ?

I could probably bring one of my Omegas down to compare

Yep, I can do Live Data.  Anything you can do to help is really appreciated, but please dont put yourself out. 

[Broomies Mate]

I have some brief live data of the car now.

Problem is, I dont know how to interpret most of what has been recorded, so any help would be appreciated.  Anything stand out as being a culprit to this fault?

http://tinyurl.com/2wlowrn

[Broomies Mate]

In comparison to the live data of a previous Omega I owned, everything seems to be in order.  Can anyone shed any light on this?

I'd like to add, when I squeeze the pipe leading to the ICV, the car doesnt stall...... the engine doesn't even fluctuate.  I've used two full cans of carb cleaner on every aspect of the engine bay to detect a vacuum leak, but cant find one.  No effect at all.

Shall I just bin this thing and buy something else, or should I persevere with a problem which is costing me hundreds of pounds?

[Broomies Mate]

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