Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: mark.adams on 30 March 2009, 10:03:38

Title: Occasional Misfire
Post by: mark.adams on 30 March 2009, 10:03:38

When driving, i can feel the engine very occasionally misses, like a heartbeat, It has a new HG, breathers are clear, new genuine cam sensor. Any ideas/suggestions where is hould start looking for the cause of this.
It's a 4 pot DBW 2.2 the Z22XE engine

Title: Re: Occasional Misfire
Post by: kevpuk on 30 March 2009, 11:04:18

Leads/plugs ?
I found that knackered leads (mainly caused by leaking cam cover gasket....) caused my occasional miss...

Title: Re: Occasional Misfire
Post by: mark.adams on 30 March 2009, 11:19:25

New plugs, GM Ones, no leads, its a dis pack (ecotec engine)

Title: Re: Occasional Misfire
Post by: feeutfo on 30 March 2009, 11:28:43

Quote

New plugs, GM Ones, no leads, its a dis pack (ecotec engine)

would suggest pulling the coil pac check for cracks and check rubber boots for splits

would double ceck with a code reader for missfire codes before buying a new coil pac though. the boots can be replaced seperately im told.

Title: Re: Occasional Misfire
Post by: kevpuk on 30 March 2009, 12:40:18

Quote

New plugs, GM Ones, no leads, its a dis pack (ecotec engine)

Doesn't the pack connect to the plugs via leads ?  :o

Title: Re: Occasional Misfire
Post by: mark.adams on 30 March 2009, 13:23:14

Quote

Quote

New plugs, GM Ones, no leads, its a dis pack (ecotec engine)

Doesn't the pack connect to the plugs via leads ?  :o

No it has spring looking bits of metal inside rubber boots.
Incidentally if i do see misfire in the logs would it be prudent to change the coil pack after checking the rubber boots??

Title: Re: Occasional Misfire
Post by: vauxmad on 30 March 2009, 15:35:45

it will tell you which sensor is picking up or not picking up something as the case may be, go from there

Title: Re: Occasional Misfire
Post by: MutantCav on 30 March 2009, 16:19:32

maybe MAF?? As said check codes :y

Title: Re: Occasional Misfire
Post by: mark.adams on 30 March 2009, 18:43:10

http://www.omegaowners.com/forum/YaBB.pl?num=1238429958
Think we have a result here guys, damned EGR valve, going to give it a blast with oven cleaner.
Is it worth me taking photos of this or do we have that already done??

Title: Re: Occasional Misfire
Post by: Marks DTM Calib on 30 March 2009, 18:51:47

Quote

http://www.omegaowners.com/forum/YaBB.pl?num=1238429958
Think we have a result here guys, damned EGR valve, going to give it a blast with oven cleaner.
Is it worth me taking photos of this or do we have that already done??

Photos please!  :y