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[kentman99]

I feel a bit disappointed at the moment as ive just picked up my car after having the rocker cover gasket, leads and plugs changed. The guy from the garage said it still misses every now and then and the idle is a bit erratic. He reckoned the coil/dispack might need to be changed to make it run spot on. I went for a vaux gasket and plugs but used bosch leads as the vaux ones were £230! One of the main dealer parts places said that using non vaux leads can knacker the dispack but dunno whether there's any truth in that but I did wonder whether it would impact on the misfire prob. The other thing is that the exhaust is blowing and really sounds bad. Someone on here suggested that may also lead to poor running........I enquired about the price of genuine dispacks from vaux and they want £140 but I saw one on ebay for about £40.

  

[amba]

If the dispack has been deep fried in dripping oil from the cam gaskets that sounds like the problem.
It is a bit of a pain to replace so be warned you need to be triple jointed and have arms like a gibbon..think the parts guy was talking rubbish as its oil/water or just age wear,n tear on  the dispack.

[HGV mechanic]

been using bosch leads for about 9 months now with now problems,
it is quiet possible the dis pack is dieing, , :-/

[kentman99]

the mechanic charged me £90 labour today with me supplying the bits and said he'd do the dispack for £40. Does it have to be a genuine vaux part to be any good??

[amba]

Bite his hand off for £40=00,that is a very good price..with that saving its almost worth buying a new VX one..do an ebay search and you will pick up a new one for half what stealers want.

[amba]

You would spend more than £40=00 in plasters.

[kentman99]

Would anybody envisage problems if I went for a cheaper pattern dispack?  The mechanic should me the old bits he replaced and the plugs looked very old and oily but the leads didn't appear to be in such bad shape.

[albitz]

I have been using ebay sourced pattern leads for 2 years,hasnt harmed the dispack.The dispack was changed the same time as the leads,i got a used one off ebay for £12,I didnt know there were pattern ones tbh.

[feeutfo]

a few points. 2.5 and 3.0 have a dispac at the rear of the engine and can not be bathed in oil. 3.2 and 2.6 have coil per plug set up and can be bathed in oil.
If you have leads then you have seperate dis pac at the rear. So no oil but they do split and allow the spark to escape.

 If you have changed spark plugs and leads and your sure its still miss firing then it only leaves the dis pac to change, if your sure the plug leads are connected correctly (breakers on here can help or there is a guy in Heathrow who specialises in breaking omegas).

Exhaust unlikely to cause a missfire.

If hes done your cam covers make sure the breathers are cleaned or they will just blow again as its the breathers that cause this. Guide in maintenance for cleaning breathers. Print it off and show him, or diy. Its fairly easy.
 The original dis pac is made by bosch, if you want new you could contact them direct or through a motor factors. Such as Camberly Auto factors or similar. Hth

[feeutfo]

ps i hope he used genuine can cover gaskits or they will fail again within 3 or 4 months. Ask him what make he fitted.

[kentman99]

I bought vaux gaskets and plugs (from main dealers) and bosch leads from halfords.

[feeutfo]

I bought vaux gaskets and plugs (from main dealers) and bosch leads from halfords.

Vx plugs are best and cheapest just for info. But you should have no problems with those parts. Just to source a dis pac then.

[kentman99]

Am I right in thinking the dispac I'll need is Vaux part no. 90511450?

[amba]

Depends what shape plug connection it has ...oval or oblong..you need to check first as it could also be ...90541062..had similar issues when changed mine getting the correct one.

[kentman99]

Are there any other areas worth checking that may cause the misfire other than the dispac? The garage did a compression test when they changed the plugs and leads and everything was okay. I'm assuming the misfire will affect the fuel economy as my car seems very very juicy!