Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: greenman on 19 September 2010, 12:05:34

Title: Misfire
Post by: greenman on 19 September 2010, 12:05:34

Started from cold this morning.Running on 3 cyl. emission light comes on.After about half a mile misfire clears and emission light eventually goes out.Any thoughts?

Title: Re: Misfire
Post by: stece on 19 September 2010, 12:19:23

lambdas? that was the issue with mine just try giving them a clean

Title: Re: Misfire
Post by: greenman on 19 September 2010, 12:36:39

Would this cause the misfire?

Title: Re: Misfire
Post by: Brikhead on 19 September 2010, 14:25:38

Quote

Would this cause the misfire?

No, lambda sensor could not cause a mis-fire, more likely the mis-fire is allowing unburnt fuel into the exhaust which is putting on the emission light.

Mis-fire could be caused by faulty plugs or leads, or maybe the coil pack (I assume one, or more, is fitted to a 2.2?).

Title: Re: Misfire
Post by: greenman on 19 September 2010, 14:42:37

I was thinking plugs as the misfire disappeared when it warmed up.

Title: Re: Misfire
Post by: CaptainZok on 19 September 2010, 14:48:42

Check the plug wells for oil.

Title: Re: Misfire
Post by: greenman on 19 September 2010, 14:56:38

Already checked today.Dry.Replaced rocker gasket 2 weeks ago.

Title: Re: Misfire
Post by: CaptainZok on 19 September 2010, 15:02:27

Quote

Already checked today.Dry.Replaced rocker gasket 2 weeks ago.

Rules the first cause out then, so it's plugs, rubber boots on the coil pack then coil pack itself in ascending order of cost.

Title: Re: Misfire
Post by: greenman on 20 September 2010, 15:22:57

Misfire only at idle.Accelerates fine.

Title: Re: Misfire
Post by: TestOmega on 20 September 2010, 15:28:48

Quote

Misfire only at idle.Accelerates fine.

Electrical system is most stressed at idle.  Battery, charging system, weak coils or marginal/fouled plugs in my opinion.

Turn all auxiliary devices off like fans, radio, heater, etc., and see if the idle improves for battery and charging system check.

Cheers.

Title: Re: Misfire
Post by: greenman on 20 September 2010, 19:37:30

Battery and charging system A.o.k.Looks like change of plugs then coils.

Title: Re: Misfire
Post by: TestOmega on 21 September 2010, 00:17:49

Quote

Battery and charging system A.o.k.Looks like change of plugs then coils.

May perhaps check what is in the following before anything else,

http://www.omegaowners.com/forum/YaBB.pl?num=1283863220

Re: Sparkplug Tightening Torque
Reply #4 - Yesterday at 18:2

Cheers.