Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: greenman on 25 July 2012, 14:26:28

Title: Misfire
Post by: greenman on 25 July 2012, 14:26:28

Misefire only under hard acceleration then clears
Emission light on
Runs fine on easy acceleration
Any ideas?

Title: Re: Misfire
Post by: Kevin Wood on 25 July 2012, 15:13:05

First things first: Are the plugs OK.

If the emission light is on there will be some codes stored too. Use the paperclip / pedal trick to read them.

Your engine type and size would help diagnosis. ;)

Title: Re: Misfire
Post by: greenman on 25 July 2012, 15:47:15

z22xe 2.2 ,52 plate
Don,t think pedal trick works on this.

Title: Re: Misfire
Post by: Steve B on 25 July 2012, 16:08:26

need a code reader on 2.2

Title: Re: Misfire
Post by: greenman on 25 July 2012, 16:12:12

Checked the plugs
No1 has white deposits on it. The rest look fine?

Title: Re: Misfire
Post by: Kevin Wood on 25 July 2012, 16:58:59

Ahh, true. 2.2 is a tricky one.

Was there any oil or water in the plug wells?

Did the coil pack look OK?

Title: Re: Misfire
Post by: greenman on 25 July 2012, 17:17:37

Plug wells were dry.
Base of the ceramic part of plugs look a bit burnt.

Title: Re: Misfire
Post by: Kevin Wood on 25 July 2012, 23:17:05

Quote from: greenman on 25 July 2012, 17:17:37

Plug wells were dry.
Base of the ceramic part of plugs look a bit burnt.

It could be leaky, I suppose. I'd say if the history of the plugs is unknown, or they have been in there a while (20k+) it would be worth trying a new set.

Would be good to read the codes and see if it's a misfire code and, indeed, cylinder 1.

Title: Re: Misfire
Post by: greenman on 26 July 2012, 10:26:04

Fitted new plugs.Seems fine.
Used twin spark same as previous ones.