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[amba]

Well guys ..put your heads together please.
I replaced my Dispack this morning and all went back together with a bit of bad language ,but all sorted .Started up car and still missing and running very rough..this did smooth out when warmed up but still not great.
Have noticed that on idle engine seems almost to mis a beat every so often and as said fairly lumpy and rough.When accelerater pushed it seems to jump a little and then sounds like a proper V6 should and revs fine.
Could this be a plug as now would prefer to go the cheaper options first,as car has 8mm magnacor leads which were fitted new just on a year ago ,and would imagine that if that was problem it would not clear when reves increased.
Any advise much appreciated as now nursing numereous cuts and scuffs from my mission with the dispack which seems to have been a waste of time ,although I do now know its history.

[tunnie]

plugs back on in the right order?

[amba]

Yes Tunnie...checked and treble checked..all as should be and checked again.!!
As said it revs great when you go beyond 1500rpm or so ,no  missing just at idle and low revs.....symptoms as before dispack replacement

[tunnie]

check for any air leaks, ICV ok?

[Marks DTM Calib]

So DIS pack is connected thus:

5-3-1
0 0 0
0 0 0
2-6-4

[amba]

Yes..have removed IDV and given it a good clean.(it was really not bad anyway)..have gone over entire engine top with carb cleaner and quick spraying and no change in engine tone.
Have just done another flash code and am getting 73 which I expected as MAF was removed and replaced whilst engine running to see if that showed up any change.
I have now got 74 as a new code...and  89 which I had right at the start of this problem so could that be pointing towards Lambda sensors but would that make engine run rough at low revs ? 

[amba]

Yes Mark....I carefully checked each lead as replaced..they had yellow collars on them and with hbv out the way it was easy to see offside bank.
Nearside again very caerfully checked so am totally sure they are in correct place.
As previously said engine runs sweet once revs are up just at low ,and would have expected 2 leads to be incorrectly palced to cause Very rough running all the time.

[tigers_gonads]

how about a simple answer ............... plugs or a dodgy lead ??   

[The Red Baron]

try blanking the egr off. had the same prob with an elite i had. this cured it.

[amba]

Trouble with these cars is you go round in circles chasing what you think is the fault.
On advise I agreed and replaced the dispack with a brand new genuine Bosch unit as it had had a similar fault last year and at that time I only did the cheap fix and put on a breaker part which did seem to cure the problem.
Major misfire last Sunday on way to work so limped home with car sounding quite sick.On advise went down dispack route and am now sitting here trying to convince myself that iI did put them leads back the way they came off with correct positions observed.
I was now also sitting here felling well pis...ed off aftre my days efforts let alone the cost, thinking should I be  going down the route of plugs/and/or leads but again is that just another take it off and try route for me.Plugs were replaced about 1 year gao (30k) along with magnacor 8mm blue leads,so would like to think that they have atleast stayed the test of time.
Car at present is undrivable and will hardly pull away although I did take it around the block and it did pick up very well when I gave it some serious revs as was causing a traffic jam as limping along at normal revs.
When idling on driveway engine keeps backfiring and am sure it sounds like air is leaking in but cannot find any trace with the can of carb cleaner.
So now I  sit here with a stiff drink and ponder how I am going to do a days work and 150 miles in my daughters KA..which I haven,t told her I will be borrowing in the morning. 

[SteveS]

amba06128,
I'm no expert, but I wouldn't rule out the MAF sensor. I've not had the issue on the Omega, but I had the fault on a Carlton I had and at high revs and loads it seemed OK, but at low revs and loads it ran really rough and I think it was overfueling due to the wrong air flow signal. I know the devices are completely different on the 2 cars, but the error could give the same symptoms.
Maybe someone could advise if there is a way to reset the ECU fault codes so you could then run the engine and recheck the codes to see if the MAF sensor really has a problem or if it was just showing a fault beacuse you disconnected it.

It's making me wonder whether my mis-fire is the DIS pack which I had just convinced myself it was.

Steve

[amba]

Thanks for opinion SteveS.
When I initially had the problems last Sunday ,coming home the car did bring up a fault code of 89 which is low voltage at oxygen sensor which I assume must be the lambard sensors,pressumably as a result of unburnt fuel being sent down the exhaust.
Tha MAF codes only appeared when I started the car after the dispack replacemnet today,and like you wondered if the engine would run any different with it disconnected(which it did slightly....so think that rules out MAF problem)hence the reason for the codes for the airmeter being logged.
Whilst it really does sound like an air leak I cannot pin-point it as I have been quite severe spraying the carb cleaner around,although I did avoid the EGR as it was very hot and didn,t want a bbq.

[Tony H]

Well guys ..put your heads together please.
I replaced my Dispack this morning and all went back together with a bit of bad language ,but all sorted .Started up car and still missing and running very rough..this did smooth out when warmed up but still not great.
Have noticed that on idle engine seems almost to mis a beat every so often and as said fairly lumpy and rough.When accelerater pushed it seems to jump a little and then sounds like a proper V6 should and revs fine.Could this be a plug as now would prefer to go the cheaper options first,as car has 8mm magnacor leads which were fitted new just on a year ago ,and would imagine that if that was problem it would not clear when reves increased.
Any advise much appreciated as now nursing numereous cuts and scuffs from my mission with the dispack which seems to have been a waste of time ,although I do now know its history.

Just fixed a similar problem this afternoon. I suspected a missfire on no. 6 pot due to a lead breaking down, so hoping for an easy fix changed the lead and "bingo" back on all six. The lead on no. 6 can be a bit of a stretch to fit over the spark plug and can get damaged. Give it a try and hope for the best

[amba]

Well after speaking to MarkDTM and Daz this evening on the emergency hotline ,the concenus of opinion from the guru,s is to replace the plugs as they have now done closer to 40k than I first thought when I checked the paperwork.
I will pay a trip to the stealers in the morning and buy 6 no..9195109 twin electrode GM plugs and have a go at fitting them later in the day.
If that fails advise now is to look for air-leaks as magnacor 8mm leads would not seem to be at fault so will report back after plug replacement with results.

[amba]

Good news,as car is now restored to its former performance.
Bought 6 new GM plugs this morning from stealers(who told me that Trade Club had now stopped...so called out branch manager and got issue resolved and 6 plugs for £14=00)
Decided to remove passenger side first as by far the worst to work on ,and was greated with all 3 plugs sitting in about an inch of a creamy coloured  water and their bodies looking pretty grim.Relpaced that side and then moved onto drivers side where all plugs were dry and clean.
Not the easiest job on a V6 but kept bothe sets of fingers and toes crossed that car would spring into life...and yes she didn,t fail me..sprang into life with a single flick of the key.
Have just come back from a 10 mile motorway and slow road test and car hasn,t missed a beat,so unsure if dispack was at fault aswell or just the plugs...anyway all fixed and normal service resumed.
Anybody else had passenger side plug wells filling with water ? and found the cause .