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Author Topic: no spark on number 1 spark plug  (Read 1873 times)

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harveycr

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no spark on number 1 spark plug
« 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
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Malcolm_D

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Re: no spark on number 1 spark plug
« Reply #1 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
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Elite Pete

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Re: no spark on number 1 spark plug
« Reply #2 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 ;)
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Malcolm_D

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Re: no spark on number 1 spark plug
« Reply #3 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
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Webby the Bear

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Re: no spark on number 1 spark plug
« Reply #4 on: 09 March 2011, 22:00:10 »
yep, second that. welcome to the family
 :y
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harveycr

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Re: no spark on number 1 spark plug
« Reply #5 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.
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harveycr

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Re: no spark on number 1 spark plug
« Reply #6 on: 10 March 2011, 12:28:34 »
Oh yes thank you for the hospitality. Cheers.....
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Andy B

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Re: no spark on number 1 spark plug
« Reply #7 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.
« Last Edit: 10 March 2011, 12:39:06 by Andy_B »
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RobG

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Re: no spark on number 1 spark plug
« Reply #8 on: 10 March 2011, 12:41:19 »
Ignition Spark     Wasted Spark 
     1                                   4 
     2                                   5 
     3                                   6 
     4                                   1 
     5                                   2 
     6                                   3 
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harveycr

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Re: no spark on number 1 spark plug
« Reply #9 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 :(
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Andy B

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Re: no spark on number 1 spark plug
« Reply #10 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
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harveycr

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Re: no spark on number 1 spark plug
« Reply #11 on: 10 March 2011, 15:19:30 »
when i try the same lead and plug in number 4 i have a spark
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Xenon

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Re: no spark on number 1 spark plug
« Reply #12 on: 10 March 2011, 15:27:00 »
Could the power lead that the dis gets its power from be damaged?
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harveycr

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Re: no spark on number 1 spark plug
« Reply #13 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
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Entwood

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Re: no spark on number 1 spark plug
« Reply #14 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 .. :(
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