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Vauxhall Zafira 1.6 Z16XEP 2005 - Running rich, code P0142 #

Posted by Piotr Sokolowski on October 21, 2011, 5:23 pm

Year of Manufacture *: 2005
Engine Size and Code *: 1.6 z16xep
( Optional ) Scanner Used: kts
( Optional) Fault Codes: P0142

Hello

Could someone give me some advice on this one please. Engine running rich lambda 0.75v map 50kpa or 2 v on idle. What could cause it-too high pressure in the manifold? No manifiold leaks.Fuel pressure 3.7 bar. Only one thing what I thing could be timing problem or blocked cat.

Any suggestions guys.

Thanks

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on October 21, 2011, 6:24 pm, in reply to "zafira b 1.6 z16xep -P0172 rich runing"
Mark Carter

Hi Pete,

try to remove the oil filler cap with it running.

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by Piotr Sokolowski <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1848' width='330' height='300' border=0 style='border:none;'> on October 21, 2011, 6:28 pm, in reply to "Re: zafira b 1.6 z16xep -P0172 rich runing"
Piotr Sokolowski

no difference sir

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by Piotr Sokolowski <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1848' width='330' height='300' border=0 style='border:none;'> on October 22, 2011, 10:43 am, in reply to "zafira b 1.6 z16xep -P0172 rich runing"
Piotr Sokolowski

checked compression in bar 10-8-8-10 anybody has any ideas?

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by ian slattery <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1196' width='330' height='300' border=0 style='border:none;'> on October 22, 2011, 12:02 pm, in reply to "Re: zafira b 1.6 z16xep -P0172 rich runing"
Ian Slattery

Have you checked the valve timing including the crank key way. Ian

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by Mark Carter <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on October 22, 2011, 12:10 pm, in reply to "Re: zafira b 1.6 z16xep -P0172 rich runing"
Mark Carter

Pete, you may have read the wrong end of the stick,

Some Vauxhall's suffer from breather issues and you can normally tell by removing (or trying to remove) the oil cap when running.

Removing the cap will not effect the running but there will be excessive depression in the engine.

regards mark

Modern cars, Its all wizardry and witchcraft

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by Piotr Sokolowski <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1848' width='330' height='300' border=0 style='border:none;'> on October 22, 2011, 12:15 pm, in reply to "Re: zafira b 1.6 z16xep -P0172 rich runing"
Piotr Sokolowski

Ian -no I didn't checkj the timing yet
Mark-with scope attached to the map removed the oil cap and there was no difference.Is it this what would you expect?I will come backj to it on monday.Any more advices more than welcome.

Re: zafira b 1.6 z16xep -P0172 rich runing

Posted by ian slattery <iframe src='https://members5.boardhost.com/ukautotalk4/info/user=UKAT1196' width='330' height='300' border=0 style='border:none;'> on October 22, 2011, 12:27 pm, in reply to "Re: zafira b 1.6 z16xep -P0172 rich runing"
Ian Slattery

Is this the engine that has egr problems. If the egr is stuck open a little bit it may cause vacuum problems. Worth a look. Ian

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