Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Ash3383 on 05 January 2015, 00:22:58
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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?
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Sounds ignition related - check plugs, leads and diss pack in that order. 2.5V6 won't throw a fault code for ignition fault ;)
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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.
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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.
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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? ;D ;D ;)
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Thank you for the suggestions. Would the leads be bad even tho I checked them with a spare plug and seen them all firing?
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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.
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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? ;D ;D ;)
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 :y
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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? ;D ;D ;)
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 :y
;D ;D ;D ;D ;D ;D :y
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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? ;D ;D ;)
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 :y
Calm down Arkwright ;D
Stuttering could be you that has a dodgy coil pack ;D
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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 :y. 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 :y 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! :y
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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.
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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
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The water bust has probably soaked and killed the dis pack
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I should add dis pack won't throw a code
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I don't totally agree with some of the above, the symptoms you have are more like those you see with a failing plug lead e.g. light throttle (requires lower voltage on plugs) OK, bit more and they break down.
Testing with a plug in atmosphere will tell you nothing as it only requires a few kV to breakdown air where as in a cylinder under compression with fuel in it you need closer to 30kV plus.....try it again with a gap of 35-40mm.
Usual symptoms of DIS pack failure is a loss of two cylinder pretty much all the time.
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Also to the OP, some more advice... Listen to whatever Marks DTM tells you; he's always given me sound advice, and my car would not be running to this day were it not for him! :y
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Many thanks to everyone for their input and help. Will hopefully have time from work to get the required bits at the weekend and get my baby sorted. Have been a guest on this forum for a few years and got some great tips and guides!
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To this forum, to everyone who replied and helped, thank you! My omega is firing on all cylinders again! Leads sorted her!!
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Good stuff! Which leads did you go for in the end, if ye don't mind my asking? It helps the forum if we know that this make of so-and-so lasts for this amount of time, you know what I mean. :)
Glad you're sorted now :y
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I got a set of ProSpark leads from EuroCarParts. For two reasons, EuroCarParts is few 100 yards from me and was a reasonable price to see if it was the leads that was the problem. Only problem with the set, leads are a bit longer than the ones in the car, down the right bank, about 3-4inches too long.
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Be worth knowing how long they last, then. Some on here replace their cheap n cheerful leads once a year, as preventative maintenance. I'm aiming for 10 years our of my Bosch ones, ot only a few quid more than the ECPs, but I suppose time shall tell :)
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Be worth knowing how long they last, then. Some on here replace their cheap n cheerful leads once a year, as preventative maintenance. I'm aiming for 10 years our of my Bosch ones, ot only a few quid more than the ECPs, but I suppose time shall tell :)
My genuine ones are 16+ yrs old, just shy of 220k
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Damn right too :)
I think I brought this up with Webby, who does the 'preventative maintenance' path with his leads, As I pointed out - let's say £25 once a year on some cheap n cheerful leads - well after 10 years, that's £250 - the same ballpark in price as Vx leads (and you can get that price down a heck of a lot lower that that, of course, as mentioned in a previous post of mine, easily under £100 for Beru) And at 16 years, and 220k, well, that's a theoretical mere £12.50 per year. 8)
I think safe to say, the Berus are an economical buy, in spite of their cost, well worth the money. I've gone Bosch, as mentioned, as an experiment, at under £30, good name, feel good quality, made in the UK, too. If they last half the time TB's Berus do (so 'only' 110k) they've been a good buy. Heard so much bad stuff about ECP, suppose it depends and luck of the draw
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...that is assuming they last ten years ;)
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Precisely ;D
As I say, and experiment. They're Bosch, at the price of ECP, so if they last no longer than the ECP cheap n cheerfuls, then no big issue, I've not paid any more... if they last half as long as the Berus, then I'm up. If they last as long as Beru at 1/4 of the price, then the drinks are on me! :y
The HTs on the old girl lasted as follows..
96-03 BERU original
03-08 BERU 2nd set (boiled in engine oil thank you previous owner no knowing what an oil 'breather' is ::) )
08-14 laid up. Hibernating :D
14-?? Bosch. Who knows? :)
PS not knocking your preventative maintenance methods, Mr The Bear, of course. We've all got to tread our own paths with how we run the cars, and it'd be pretty useless if we all did the same thing, and bought everything from the Stealers. :y
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Completely agree mate :)
My own reasons for doing it is simply.... i actually wouldnt want a ten / sixteen year old set of leads in there. But again just personal preference :)
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Noo 15 year olds a no-no. But 16 is fine :D