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Vauxhall Corsa 1.2 Z12XEP 2007 - Rough idle #

Posted by Paul Edge on August 24, 2017, 3:17 pm

Year of Manufacture *: 2007
Engine Size and Code *: 1200 z12xep rough idle
( Optional) Fault Codes: No faults

Running rough at idle...runs ok when Reved. Intake vacuum 12 inhg tick over..smoked tested no leaks. Checked cam timing all ok. All compression 210 psi..no cylinder leakage..removed o2 sensor before cat in case blockage but still the same

I'm new to the wps500
Does this wave form look good
Paul

Re: Vauxhall corsa

Posted by Kevin Apps on August 24, 2017, 4:13 pm, in reply to "Vauxhall corsa"
Kevin Apps

Paul

Emissions High ? PCV ?

Kev.

Re: Vauxhall corsa

Posted by Paul edge on August 24, 2017, 5:04 pm, in reply to "Re: Vauxhall corsa"

Co 0.20
Hc 33ppm
Lambda 1.00

Stft minus 24%
Injector time 3.7ms
Ltft 0.0%

Will put back on gas machine tomorrow for oxygen% reading

Paul

Re: Vauxhall corsa

Posted by Paul edge on August 24, 2017, 5:24 pm, in reply to "Re: Vauxhall corsa"

No excessive crankcase vacuum..all breather pipes clear
Paul

Re: Vauxhall corsa

Posted by Andrew Evans on August 24, 2017, 7:55 pm, in reply to "Re: Vauxhall corsa"
Andrew Evans

Post the Pico file here....https://members.boardhost.com/ukautotalk12/

and we can all have a look!

Re: Vauxhall corsa

Posted by Andrew Pethig on August 24, 2017, 10:37 pm, in reply to "Re: Vauxhall corsa"
Edited by board administrator September 20, 2017, 3:11 pm

a egr slightly open will cause symptoms you decribe

Ongoing #

Posted by Paul edge on September 25, 2017, 2:01 pm, in reply to "Vauxhall Corsa 1.2 Z12XEP 2007 - Rough idle #"
Edited by board administrator September 27, 2017, 1:40 pm

Just to put this one to bed..
Having gone on holiday for a week and getting back to work today...to find another mechanic putting in a 2nd hand engine....just hope it sort it...
Paul

Re: Ongoing #

Posted by Paul edge on October 4, 2017, 3:49 pm, in reply to "Ongoing #"

Well can you believe it.2nd hand complete engine fitted and still the same problem.only now timing chain is rattling it's head off...
They won't listen..

Re: Vauxhall corsa

Posted by keith brown on October 23, 2017, 1:49 pm, in reply to "Re: Vauxhall corsa"
Keith Brown

did u get this sorted,i notice in one post it had a stft of -24% !! this is surley removing idle fuel to stay on lambda,has this a maf? they are very reliant on a gen maf hth

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