Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: tOnYoYo on 09 March 2014, 13:19:13

Title: Random miss fire issue when under load at idle
Post by: tOnYoYo on 09 March 2014, 13:19:13

So my 2001 MV6 3.2 has developed a 0300 fault.

It rears it's head when the car is stationary and I slip it into reverse. Sometimes it's immediate, occasionally I have to wait up to 30+ seconds before is start running lumpy.

Yesterday it happened in Drive at some traffic lights and then the engine management light came on and I had to limp home. When I got home and switched the car off and on again, it was fine.

I took this off the engine today and it looks a bit buggered, but I have no idea what it is called:
https://onedrive.live.com/redir?resid=1A23888A15BCD454!539&authkey=!AFin2XA45X9xFJI&v=3&ithint=photo%2c.jpg

Could this be the cause of all my woes? Or is it going to be more complicated that this?

Thanks in advance!

Title: Re: Random miss fire issue when under load at idle
Post by: PhilRich on 09 March 2014, 13:26:33

Yep! That coil pack is well past retirement age ;D :y

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 09 March 2014, 13:28:06

Thanks PhilRich  :)

I guess the other side is probably past its best too but that one's a pain to remove. The car's done 105k.

Any idea of cost for two of these?  ???

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 09 March 2014, 15:30:40

Search for the right ones for your car here. They sell genuine Bosch coil packs.

http://www.vauxhallworldparts.com

Title: Re: Random miss fire issue when under load at idle
Post by: chrisgixer on 09 March 2014, 21:41:15

Iirc, there where miss fire problems before. ::)

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 11 March 2014, 14:14:25

There seems to be two, and the both supposedly fit. What's the difference between a 12804 and a 12805? Are they just left and right?  ???

Title: Re: Random miss fire issue when under load at idle
Post by: martin42 on 11 March 2014, 17:29:47

They are handed  :y

Title: Re: Random miss fire issue when under load at idle
Post by: The Omega Glory on 11 March 2014, 20:32:44

Had the same problem with mine on the 1-3-5 bank. Genuine bosch replacement at competitive price here.

http://www.carparts4less.co.uk/cp4l/c/Vauxhall_Omega_3.2_2003/p/car-parts/engine-parts/ignition1/ignition-coil/?413720250&1&25f3452e46b7e4b5479237097537de01371eb761&000197

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 12 March 2014, 18:59:30

I am both baffled and amused by these two seemingly identical items with different colour plugs being priced differently to each other...  ;D

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 12 March 2014, 19:31:10

Carparts4less are considerably more expensive than http://www.vauxhallworldparts.com/ for the same Bosch packs.   :-\

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 12 March 2014, 20:48:15

If you stand in front of the car, which bank is on your left? Is it 1-3-5?

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 12 March 2014, 21:01:58

Looking into the engine bay, 135 on the left.  :y

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 12 March 2014, 21:48:36

Cool. Thanks!

That's the one in the picture. You think I should try just replacing that one, or just do them both at once?

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 12 March 2014, 22:04:14

My 246 is at fault at the moment and I'm only going to change it.

Matter of choice. Do you intend to keep the car ? If you do and you can afford both, then maybe wise to do the 6 plugs, both packs and get the codes cleared while the plenum etc is off.

Hope you cure it !  :y

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 12 March 2014, 22:08:00

Other thing I have to consider too is where the water etc is getting in to kill the pack. A known good one only lasted a couple of weeks and she is chugging badly with 0300 and 0302 stored..... Again.

Need to get someone who knows their stuff to do the job for me and seal the wipers/scuttle etc.  :(

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 14 March 2014, 19:40:53

Thanks for your help guys.  :y
I've opted to buy both sides from VauxhallWorldParts, and they arrive Monday.

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 21 March 2014, 19:10:59

I've managed to get home with some sun remaining and fitted the 1-3-5 coil. Runs like a dream!  :D

Title: Re: Random miss fire issue when under load at idle
Post by: Paddy Flannery on 21 March 2014, 19:20:55

Good news  :y

My 2 4 6 is due to arrive Tuesday. Hope I get a similar outcome !

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 21 March 2014, 21:24:19

 :y

Title: Re: Random miss fire issue when under load at idle
Post by: tOnYoYo on 22 March 2014, 14:44:36

Bugger. Got a misfire on Cylinder 6 too. So I've stripped the car apart to fit the 2-4-6 coil and found this: https://onedrive.live.com/redir?resid=1A23888A15BCD454!551&authkey=!ACCgHlsm6KQUe48&v=3&ithint=photo,.jpg https://onedrive.live.com/redir?resid=1A23888A15BCD454!552&authkey=!AODBoEUIvoLTSdw&v=3&ithint=photo,.jpg

Yup. That's a bit screwed.  ;D

Title: Re: Random miss fire issue when under load at idle
Post by: 05omegav6 on 22 March 2014, 15:08:18

Yup, that'd do it ;D