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[Ash3383]

Hi guys, new to the forum. Need some help with my 00 omega 2.5 v6 (x25xe). Had the water pipe at the rear of the engine rupture. Repaired it and drove a happy 600 miles over Xmas. Last tues I went for a spin to town and the car developed what I believe to be a misfire. Very jumpy under load or any type of acceleration, like it's on kangaroo fuel. If you nurse the car and be very gentle with it, she's grand. Come to any incline or when your starting off from lights revving up to 2000rpm, the car is shocking jumpy and there's serious vibrations when your stationary.

Called into local garage who put it on computer, no faults shown to explain it. Said it could be a number of things from leads, plugs, vac pipes. Then noticed one to front butterfly tore and we repaired it. I have since checked the timing of the car, it's spot on. Checked spark plug leads, they are all firing. Plugs down the pass side of the engine were covered in oil, typical rocker gasket failure. Over the weekend I repaired the gasket, cleaned the plug holes and replaced the spark plugs with new ones. Then cleaned the oil breathers in the plentium and rebuilt everything. Car still the same, lumpy and no better. Any suggestions?

[dbug]

Sounds ignition related - check plugs, leads and diss pack in that order.  2.5V6 won't throw a fault code for ignition fault

[zirk]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

[zirk]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

[dbug]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

? - got a stutter mate? 

[Ash3383]

Thank you for the suggestions. Would the leads be bad even tho I checked them with a spare plug and seen them all firing?

[zirk]

Thank you for the suggestions. Would the leads be bad even tho I checked them with a spare plug and seen them all firing?

You cant rely on a spark plug sparking, the symptoms you describe -

" If you nurse the car and be very gentle with it, she's grand. Come to any incline or when your starting off from lights revving up to 2000rpm, the car is shocking jumpy and there's serious vibrations when your stationary."

are typical of of misfire under Engine load.

[zirk]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

? - got a stutter mate? 

Seems that way.

I said, it seems that way. 

Didn't think the New Forum Software let you do double posts? 

I said, Didn't think the .... oh forget it 

[dbug]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

? - got a stutter mate? 

Seems that way.

I said, it seems that way. 

Didn't think the New Forum Software let you do double posts? 

I said, Didn't think the .... oh forget it 

 

[plym ian]

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

Sounds like a failing Coil Pack to me (or Dis Pack as some call it) or could be baked Spark plug Leads (cooked whilst in Oil).

For me, any misfire on a 2.5 or 3.0 after discovering Oil / Water in the Spark Plug Wells is check / replace, Spark Plugs, Leads, Diss Pack, in that order.

? - got a stutter mate? 

Seems that way.

I said, it seems that way. 

Didn't think the New Forum Software let you do double posts? 

I said, Didn't think the .... oh forget it 

Calm down Arkwright 

Stuttering could be you that has a dodgy coil pack 

[Diamond Black Geezer]

Got some 'good' used leads the other week, and found they were causing terrible misfire issues. Replaced with brand new Bosch, and now like a Sewing Machine drizzled in honey  . Definitely worth replacing as mentioned above - leads and plugs. Even if the problem isn't cured, they're service items anyway, so you don't need to feel bad about 'wasting' money, as you'd have been replacing them at some point anyway.

Personally in terms of likelihood I'd say the order is leads, coil pack plugs... however, the order plugs, leads, coil Pack is recommended on here for reason of cost ie:

Plugs £3ish (each)
Leads £40 to £80 (VX £200+)
Coil Pack £40 to a million £ and one of your children

Easy to see why coil pack is the last recommended option!

If you're heading down the new leads route, there's plenty of info on here, but here's an abbreviated version, in my experience. This after much searching as I needed new leads for my baby  Hopefully save you a few ££s after Christmas

£200+ Genuine Vx (Made by Beru)
£85-£120 Beru (so identical to what you buy from the Dealer)
£80-£130 'Performance' leads various makes from heebay/specialist sites. Check reviews. Made for classic cars of all lengths, can be made to order etc..
£60 approx for Bosch (good quality make, equivalent to Beru imo)
£55 from Keith B in the ABS (& a member on here) superior quality to Beru / GM. In black, red or blue, should you fancy it.
£45 from Keith B, thinner, and perfectly reasonable quality. The perfectly decent, economical option
£38 Bosch for Vectra 2.5 V6 (I went for this option after I found that the Vectra leads, though fractionally different lengths, still reach in an Omega engine bay)
£20-40+ Cheap 'n' Cheerful noname / eurocraparts / Honest heebay trader PingpongUKLtd (no personal experience, but you may get lucky & last you 10 years, or they may misfire after a few months. Get what you pay for)

As ever, if you're not in Trade Club, join the Autobahnstormers (google in on here/the web) save yourself a fortune on the first trip to the Vx Stealers. Keith B will also be able to sell you a kit of service items of all filters and plugs, all genuine Vx. The cost saving over Trade Club price equal to the cost of the plugs... and about half what Vx charge.

Hope that helps! 

[terry paget]

Beware buying very cheap plug leads from a motor factor. I did so two years ago, cured the misfire, but caused radio interference. I suppose they were not sufficiently resistive. So I had to take it all apart again to fit a spare set of Vx lead I found lying about. It was all right then.

[Webby the Bear]

Mine purchased from ECP (£30 IIRC) and they've been replaced when i did my cam covers a couple of months back for preventative maintenance.

nowt wrong with them and they'd been in a couple of years but thought as i got access to the Dispac.....might as well change them.......for another set from ECP

[JamesV6CDX]

The water bust has probably soaked and killed the dis pack

[JamesV6CDX]

I should add dis pack won't throw a code