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Vauxhall Omega 2.6 V6 2003 (53) - Emission fault, multiple misfires - Fixed #

Posted by Simon Dean on March 23, 2009, 12:24 pm

Year of Manufacture *: 53
Engine Code or Type *: Y26SE
( Optional ) Scanner used: BOSCH

Hi All
Got an omega 2.6 that came in with mutiple cylinder misfire codes cyls 4.5.6.n/s
inspected and found water ingress/damage to ns bank coil pack/plugs....replaced.
still got erratic idle/misfire....emissions test 4% oxygen and sensor locked lean
removed intake and inlet manifold to inspect plastic base plate seals..all look ok.
we are currently fitting a seal kit at moment
will report emissions this afternoon.

Any other pointers/common issues please

simon

Re: Vauxhall Omega 2.6 V6 2003 (53) - Emission fault, multiple misfires #

Posted by simon dean <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT5221' width='330' height='300' border=0 style='border:none;'> on March 30, 2009, 8:27 pm, in reply to "Vauxhall Omega 2.6 V6 2003 (53) - Emission fault, multiple misfires #"
Simon Dean

Update
Fitted new seals to inlet manifold..emissions..no excess oxy..still got misfire at idle l/h bank 2/4/6.
carried out primary voltage and current ramp all look good..happy with ecu at present.
lift it to 1100 rpm it stops and light off..thinking vac gauge tommorrow..valve spring broken possibly?
Will post more tommorow and re check everything

any ideas guys

Simon

Fixed #

Posted by Simon Dean on April 3, 2009, 10:49 pm, in reply to "Vauxhall Omega 2.6 V6 2003 (53) - Emission fault, multiple misfires #"
Message modified by board administrator April 5, 2009, 12:17 pm

Looks like i am on my own with this one

Decided to remove l/h cat to see if ok as they are common to melting /breaking up...all ok
Put emissions probe in manifold whilst off...excess oxy
removed timing covers l/h bank exhaust cam sprocket 1 tooth out!
Jumped due to heavy misfires caused by water ingress to coil pack...
Clue was misfires on all cylinders on l/h bank showing on autodiagnos.
lift it off idle to 1100 rpm all was well....valve train fault
simon

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