Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: berserkerboy on 30 September 2017, 20:39:08

Title: Small idle issue after plug change
Post by: berserkerboy on 30 September 2017, 20:39:08
Hi folks

Changed the plugs on my 3.2 lpg estate today. About 3 years ago I put bosch plugs in, but they were single electrode. Recently the idle has been slightly uneven, both at start up and when warm, hence the change. There was a bit of oil in the wells which I am not entirely surprised about. Will look to do the cam gaskets soon. Probably damaged when the car was converted to LPG a while ago.

I put NGK triple electrodes in. Good price on CP4L. ca £19 all in.

However, the uneven idle appears to be even worse now at start up. It idles fine, then revs up a bit, goes back to fine, then revs up again etc. When the car switched into LPG I noticed the idle seemed alot smoother.

Haven't yet taken the car for a run to see how she behaves but I was wondering if anyone had any initial thoughts?
Title: Re: Small idle issue after plug change
Post by: berserkerboy on 02 October 2017, 09:04:18
So this is still a niggling problem. Seems worse at start up. I'll see if there are any codes today. Car seems fine out on a trip.
Title: Re: Small idle issue after plug change
Post by: TheBoy on 02 October 2017, 18:26:03
What are trims doing on petrol?

Triple electrode plugs aren't ideal for LPG cars, and might be highlighting a pre existing condition
Title: Re: Small idle issue after plug change
Post by: berserkerboy on 02 October 2017, 20:32:44
Typical of me :(.  Thought I was getting better plugs but it appears the single ones are probably better for LPG.

I'm sure you're right. Existing condition been highlighted.

Laptop needed to charge so didn't get a chance to get any codes today.

Not sure if my naff code reader (we all know the one)  ;) gives fuel trims.



Title: Re: Small idle issue after plug change
Post by: berserkerboy on 02 October 2017, 21:15:46
Perhaps I should get these.

http://www.ebay.co.uk/itm/6x-Vauxhall-Omega-3-2-V6-Genuine-Bosch-Super-Plus-Spark-Plugs-/361609125952?fits=Model%3AOmega&hash=item5431956040:g:BRgAAOSw4A5Yy4TK

Title: Re: Small idle issue after plug change
Post by: Stige on 02 October 2017, 22:12:33
Perhaps I should get these.

http://www.ebay.co.uk/itm/6x-Vauxhall-Omega-3-2-V6-Genuine-Bosch-Super-Plus-Spark-Plugs-/361609125952?fits=Model%3AOmega&hash=item5431956040:g:BRgAAOSw4A5Yy4TK

Is that price really for 6 plugs?   :o
In Finland we probably have to pay that much for a single plug...
Title: Re: Small idle issue after plug change
Post by: berserkerboy on 03 October 2017, 09:14:27
Perhaps I should get these.

http://www.ebay.co.uk/itm/6x-Vauxhall-Omega-3-2-V6-Genuine-Bosch-Super-Plus-Spark-Plugs-/361609125952?fits=Model%3AOmega&hash=item5431956040:g:BRgAAOSw4A5Yy4TK

Is that price really for 6 plugs?   :o
In Finland we probably have to pay that much for a single plug...
Yep. 8)