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Omega Help Area => Omega General Help => Topic started by: mick-1975 on 31 August 2011, 19:00:15

Title: car missing on number 3 plug
Post by: mick-1975 on 31 August 2011, 19:00:15
after all the grief about my last post that car wont start i have managed to sort it after changing fuel pump car started .but now missing badly . checked the plugs and number 3 not sparking .
   any ideas . please  :y
Title: Re: car missing on number 3 plug
Post by: dbug on 31 August 2011, 19:02:04
Compression (or lack of), duff plug, duff lead or dis pack.
Title: Re: car missing on number 3 plug
Post by: mick-1975 on 31 August 2011, 19:19:07
Quote
Compression (or lack of), duff plug, duff lead or dis pack.

   was running ok before all the hassle with fuel pump .
 checked plugs and changed them all spark apart from no 3 .
Title: Re: car missing on number 3 plug
Post by: RobG on 31 August 2011, 19:20:22
Swap a sparking plug with the non sparker to eliminate coilpack
Title: Re: car missing on number 3 plug
Post by: mrgreen on 31 August 2011, 19:29:13
more of a question really than an answer but my 2.2 has a coil pack which is all 4 in a row which sits over the plugs so if one coil goes down is it possible to replace just the one or do you need to get the whole shabang?
Title: Re: car missing on number 3 plug
Post by: RobG on 31 August 2011, 19:35:12
You can buy replacement rubber boots and springs but the actual pack itself is an all in one jobbie
Title: Re: car missing on number 3 plug
Post by: Andy B on 31 August 2011, 19:35:57
Quote
more of a question really than an answer but my 2.2 has a coil pack which is all 4 in a row which sits over the plugs so if one coil goes down is it possible to replace just the one or do you need to get the whole shabang?

the whole lot I'm afraid.  ;) ;)
Title: Re: car missing on number 3 plug
Post by: mick-1975 on 31 August 2011, 19:39:52
i have tried 3 different plugs in the not working one also tried them in others so plugs are sparking but not on no 3 .
Title: Re: car missing on number 3 plug
Post by: mrgreen on 31 August 2011, 20:00:59
oh when it rains it pours, when you had your fuel pump problem did you check for spark because if so maybe there's a chaffed wire leading up to the pack or bad connection, maybe a long shot but i would check the wiring before investing in a new coil pack
Title: Re: car missing on number 3 plug
Post by: mick-1975 on 31 August 2011, 23:32:10
before the problem i had a spark at all 4 as this was first thing i checked for . but know only on 3 of them .
Title: Re: car missing on number 3 plug
Post by: Marks DTM Calib on 01 September 2011, 13:11:14
Question is, how are you testing them as to do it correctly you need a large gap test plug to simulate the required 30-40mm gap.

If you work on a small gap you get no indication as to if the coil is ok and can also apply to low a load to it which may damage it.
Title: Re: car missing on number 3 plug
Post by: mick-1975 on 01 September 2011, 13:48:48
all sorted now car back up and running . Thanks to you
Title: Re: car missing on number 3 plug
Post by: tunnie on 01 September 2011, 13:57:12
Quote
all sorted now car back up and running . Thanks to you

What was the problem?
Title: Re: car missing on number 3 plug
Post by: Skint on 01 September 2011, 17:55:23
Quote
Question is, how are you testing them as to do it correctly you need a large gap test plug to simulate the required 30-40mm gap.

If you work on a small gap you get no indication as to if the coil is ok and can also apply to low a load to it which may damage it.

Does the same apply to my issue on an X20XEV? I tried checking the sparks with a spark plug in the end of a HT lead and a jump lead from there to the battery negative.
Title: Re: car missing on number 3 plug
Post by: freecall666 on 02 September 2011, 13:22:23
Quote
Quote
Question is, how are you testing them as to do it correctly you need a large gap test plug to simulate the required 30-40mm gap.

If you work on a small gap you get no indication as to if the coil is ok and can also apply to low a load to it which may damage it.

Does the same apply to my issue on an X20XEV? I tried checking the sparks with a spark plug in the end of a HT lead and a jump lead from there to the battery negative.
can get spark plug,and lead tester for around £15. or old timing gun will work for few quid.
Title: Re: car missing on number 3 plug
Post by: Marks DTM Calib on 02 September 2011, 13:25:34
Quote
Quote
Question is, how are you testing them as to do it correctly you need a large gap test plug to simulate the required 30-40mm gap.

If you work on a small gap you get no indication as to if the coil is ok and can also apply to low a load to it which may damage it.

Does the same apply to my issue on an X20XEV? I tried checking the sparks with a spark plug in the end of a HT lead and a jump lead from there to the battery negative.

Yes it applies to all and the test done is not a great test sadly.

Basics are that under compression, you need mega volts to create a spark in the cylidner, at atmpsheric pressure, to simulate this you need a big gap.

You could break down a 1mm spark gap with only 1KV at atmosperic pressures.
Title: Re: car missing on number 3 plug
Post by: mick-1975 on 03 September 2011, 14:36:13
Just to let you all know car all sorted now i changed the coil pack and it started and ticked over great . thanks for all your help on here . :y