Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: D on 18 November 2013, 18:35:35
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has come on out of the blue. 0300 and 0304 as per pedal trick. Now which side is that cylinder on? I only had the coil pack on the passenger side and the spark plugs renewed at 24k . Car currently has done 49k. Surely it isn't time to replace the spark plugs yet, is it. Or does LPG mandate more frequent plug changes than 40k?
Unless it is the driver side bank and the coil pack needs replacing?
And if so who do I take my LPG'd Omega to, now that I am based in Surrey?
Although I love the old girl, she does sometime test my patience.
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2-4-6 is passenger, LPG needs a stronger spark. I'd be changing them every 20k for GM's twins :)
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So the new ones that went in were Bosch quads, purely because the original ones in there were quads. Damn it, the passenger side is even more difficult to get to!
Any one around Surrey that can help with this issue?
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Quads are deemed long life, but feeling here is they are thinner electrodes than twins, seen a few failure reports here. Twins are cheaper and last well with LPG many use them here, including me, without issues. Clocked up lots of miles between us!
Sadly I'm mega busy until Christmas :(
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So the new ones that went in were Bosch quads, purely because the original ones in there were quads. Damn it, the passenger side is even more difficult to get to!
Any one around Surrey that can help with this issue?
Whereaboots in Surrey? Can do things most days, often up in Horsham... :y 10(ish) minute job to change the plugs
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I have sent you a PM.
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10 mins, with LPG? You are not called Superman by any chance are you?
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10 mins, with LPG? You are not called Superman by any chance are you?
;D I had overlooked the lpg ::) maybe 20 mins then...
PM replied :y
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Depends where the LPG injectors are, 1-3-5 bank is a doddle, 2-4-6 is not bad once you move that loom out of the way. Few mins to unclip it and put it out of the way.
Least with 3.2, once coil pack is out you can access all plugs.
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10 mins, with LPG? You are not called Superman by any chance are you?
;D I had overlooked the lpg ::) maybe 20 mins then...
PM replied :y
Hmm, nothing in my inbox?? ???
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Should be :-\
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Got it eventually, and replied.
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Many thanks to Al who helped sort the plug change out this afternoon. :y
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Many thanks to Al who helped sort the plug change out this afternoon. :y
You're welcome :y
Did it behave on gas?
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For a bit and then started misfiring again. I think it may be the coil pack as well due to water exposure. Although this one was only changed 18 months ago and was a genuine Bosch unit. Pain in the bottom!
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Are the codes the same :-\
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Yes. 0300 , 0304. Must be the coil pack. Although last time around (18 months ago) it was 0306 as the no 6 cylinder was most susceptible to the scuttle leak. Could you put the pics you took up on here if you still have them please? Cannot remember how they looked.
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Will do when I get home :y phone and photobucket aren't a good combination ::)
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Pics as promised...
Plug wells... 4 and 6 were damp, but not swimming. Dried before refitting.
(http://i1277.photobucket.com/albums/y486/05omegav6/DSC_0207_zps1c714ecc.jpg)
246 Coil pack... corroded but seen worse.
(http://i1277.photobucket.com/albums/y486/05omegav6/DSC_0206_zpsaf8dff8f.jpg)
(http://i1277.photobucket.com/albums/y486/05omegav6/DSC_0205_zpscb39dae9.jpg)
(http://i1277.photobucket.com/albums/y486/05omegav6/DSC_0204_zps149f767b.jpg)
Old plugs... 135 were fine, nice pale brown with just a hint of soot in one quadrant, but 246 were much sootier, although all three were the same, number 4 looking no different to 2 or 6 :-\
Should add, the 246 plugs were showing water stains on the exposed metal areas, 135 were not...
If it is only misfiring on gas, might that be temperature related :-\
Whilst the plug end of the coil packs are in the firing line for scuttle leaks, where exactly the water gets into the plugwells is a bit of a lottery... in this case the plug well for 2 was bone dry, yet that coil is the most rusty :-\
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I wonder what I should do now? Change the coil pack on a whim or has anyone else got any suggestions?
Which reminds me that I should be changing my LPG filters soon, but surely that shouldn't cause a unilateral misfire should it?
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The lpg filter might cause the 0300 if the fuelling is out as a result of a clogged filter, but the 0304 being more specific does point to the coil pack :-\
It's a pity that the codes don't tell which fuel the engine was using at the time :-\ only real way to tell would be to watch the live data whilst running on each fuel...
Might be work giving MarkDTM (Fuse 18) a shout, he has a Tech 2 and lives in Nottingham, which last time I looked is pretty much on the way to Leeds...
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For what a coil pack costs, I am considering changing it anyway.
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If it is missing on petrol then coil pack is looking likely, but if it is only missing on LPG, then that would need looking at :-\
If missing on both, then new coilpack and seal the scuttle up :y
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Seen worse re coil pacs.
What are the fuel trims doing?
Its worth running it on petrol for a good few miles to get any fuel trim error back to zero, assuming the petrol side of things is in order.
Then turn the gas on and see what happens. If it misses immediately then I'd say the cp would be worth changing. But if it takes a while for the missfire to chime back in then I think your looking at an lpg set up issue. Could be that the miss caused the lpg to run rich if it has adaptions turned on. In which case the lpg needs remapping/setting up again.
Do you have access to the lpg software?
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Also check the lambda activity on that bank 246
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Likewise regarding the coil packs...
Lpg is an Emer kit :y
Guessing the lpg ecu lives under the scuttle, as scuttle shelf cut where it curves from the abs unit to the bulkhead, just about where the aircon pipe connector is. A plate has been fabricated to drain the water away from the 246 coilpack plug, but there was evidence of water in the lpg loom ducting from the scuttle across the back of the engine.
Presumably an iffy lpg injector would register as a misfire because the engine ecu knows no different :-\
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Likewise regarding the coil packs...
Lpg is an Emer kit :y
I've also seen better that wouldn't play ball. Tbh. :(
But I'd be looking for a more conclusive diag before replacing.
...obviously steer clear of used ones.
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Good advice. I will try that. I had to run 250 miles on petrol today. It was an alien sensation running on petrol. No misfires on petrol at all. Will try lpg in the morning.
I suppose the lpg settings could have drifted. Perhaps that's why the plugs were particularly sooty on the 246 bank? I will get the lpg looked at as well.
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I have disg kit incl live data capability , happy to look it over :y
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No misfires on petrol does point to an lpg issue rather than a coilpack one... Certainly gives an area to be looking in :y
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It could be a border line coil PAC. But I'd be checking trims, lambdas and codes again, and the gas set up, before condemning cp :)
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So eventually I manage to fill the car with LPG. Been too busy, to contemplate faffing around with LPG/misfires etc. Did about 600 miles on petrol. Now that was painful! Particularly at the pumps.
Switch to LPG and the misfire starts almost within a minute of it switching over. Oddly though, it is when it is idling that the issue is most noticeable. Rev the engine and the misfire almost seems to go away. Would that suggest a LPG supply/mapping issue?
Hopefully I will be getting the LPG looked at soonish.
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LPG needs a "better" spark to ignite than petrol, so worth checking plugs/leads/coilpacks for any "wear" before stripping things down too much.
Can run fine on "borderline" ignition side on petrol but LPG will ALWAYS find any weaknesses.
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LPG needs a "better" spark to ignite than petrol, so worth checking plugs/leads/coilpacks for any "wear" before stripping things down too much.
Can run fine on "borderline" ignition side on petrol but LPG will ALWAYS find any weaknesses.
Plugs were brand new GM quads fitted last week, coil pack not pretty, but a long way from horrible... :-\
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i take it that you have checked and fitted new lpg filters in the system as this will also cause a misfire.
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Is the vaporiser freezing up? Good coolant flow thought it?
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Plugs are new as Al said. Hopefully having lpg checked this weekend. I however have this horrible feeling that it will end up being the coilpack.
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Final update. Turns out it was a faulty injector. Swapped it for a new one and all is back to how it was. LPG log shows nearly 900 hours on gas and 150 on petrol.
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One of the lpg ones?
Glad sorted :y