Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: harveycr on 09 March 2011, 21:42:51

Title: no spark on number 1 spark plug
Post by: harveycr on 09 March 2011, 21:42:51

After changing the near side head gasket my omega V6 was running lumpy. I have traced the fault to no spark at number1 plug. I have changed the DIS but the fault remains. Could someone point me in the right direction.Thanx

Title: Re: no spark on number 1 spark plug
Post by: Malcolm_D on 09 March 2011, 21:47:10

Try swapping the plug lead for one known to work. As far as I am aware the only culprits for no spark are the coil pack, HT leads and plugs.  :y

Title: Re: no spark on number 1 spark plug
Post by: Elite Pete on 09 March 2011, 21:49:46

Hi and welcome to the forum.

If you don't have a spark on number 1 its more than likely to be a plug or the lead, if it was the dis pack there would be no spark on two cylinder because they a linked ;)

Title: Re: no spark on number 1 spark plug
Post by: Malcolm_D on 09 March 2011, 21:55:06

Sorry, forgot my manners  :-[. Welcome to the forum, I am sure you will find lots of really useful advice, offers of help and real generosity. They truly are a fantastic bunch of enthusiasts!  :y

Title: Re: no spark on number 1 spark plug
Post by: Webby the Bear on 09 March 2011, 22:00:10

yep, second that. welcome to the family
 :y

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 12:27:30

Hello just going back to the no spark on number 1 cylinder i have just been back to it and i have ruled out the lead and spark plug. All the other 5 have a spark output i have tried a second DIS unit and the result is still the same. Anybody have any other ideas.

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 12:28:34

Oh yes thank you for the hospitality. Cheers.....

Title: Re: no spark on number 1 spark plug
Post by: Andy B on 10 March 2011, 12:36:05

Quote

.... and i have ruled out the lead and spark plug. All the other 5 have a spark output i .....

It's a wasted spark system, ie 2 plugs share the same coil (coil pack consists of 3 coils all in one lump of plastic) so it has to be a plug or lead or you don't have 5 sparks.

No 1 shares a coil with with No 4 so you'd have lost No 4 spark too if it was the coil. Try swapping leads around ..... i know you're limited due to varying lengths.

Title: Re: no spark on number 1 spark plug
Post by: RobG on 10 March 2011, 12:41:19

Ignition Spark     Wasted Spark 
     1                                   4 
     2                                   5 
     3                                   6 
     4                                   1 
     5                                   2 
     6                                   3 

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 15:14:41

i have just pulled number 4 and i have a spark on 4 but no spark on number 1 :(

Title: Re: no spark on number 1 spark plug
Post by: Andy B on 10 March 2011, 15:16:51

Quote

i have just pulled number 4 and i have a spark on 4 but no spark on number 1 :(

so it's has to be the HT lead or the spark plug.  :y

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 15:19:30

when i try the same lead and plug in number 4 i have a spark

Title: Re: no spark on number 1 spark plug
Post by: Xenon on 10 March 2011, 15:27:00

Could the power lead that the dis gets its power from be damaged?

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 17:06:51

i have checked the DIS plug and tried to follow the wire through the loom but it looks ok. Im at a loss. Do you think i should try a new DIS

Title: Re: no spark on number 1 spark plug
Post by: Entwood on 10 March 2011, 17:33:22

Quote

i have checked the DIS plug and tried to follow the wire through the loom but it looks ok. Im at a loss. Do you think i should try a new DIS

Your opening post says you have already changed the DIS ???

I is confuzzed .. :(

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 10 March 2011, 19:15:13

Iam confused as well. I don't understand why I have got a spark on 4 and not from 1. I will try the other dis pack again. Surely if there is power going to one side of the shared coil then that rules out the plug. I have proven the lead and the spark plug. Thanx for your help guys. Priceless.

Title: Re: no spark on number 1 spark plug
Post by: henryd on 10 March 2011, 20:32:14

Have you tried plugging number 1 lead  into a spare spark plug and laying it on the head and seeing if a spark is present when the engine is run, just wondering if your problem with number 1 cylinder is being caused by something other than the ht circuit

Title: Re: no spark on number 1 spark plug
Post by: harveycr on 13 March 2011, 09:44:50

Yes i have tried that i have a spark at number 4 and with the same lead and plug in number 1 there is no spark. the same thing happened when i tried a second coil pack. i am at a loss.

Title: Re: no spark on number 1 spark plug
Post by: jonnycool on 13 March 2011, 11:22:23

Is there fuel getting to that cylinder? Just a thought..

Damaged valve, piston ring?

Sorry, just read it again, no spark  :-[