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displaying posts 1 to 11 of 11
| Author | Subject: Stuttering Engine |
 rudolf
Seasoned Pro  Location: Skelmersdale Registered: 07 Apr 2004 Posts: 2,769 Status: Offline |
Post #1
My car has just passed its MOT so have good emissions, however it has just started uneven running just below 2000RPM and on idle.Any ideas on if a sensor is at fault? ________________________________________ S Reg Diablo standardsSpec SORNEDR Reg Nile standard spec written off then repaired X Reg Astor in need of TLC R Reg Nile to restore Set of Lions to fit. |
 Posted 22nd Jun 2018 at 21:54
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blandy
Seasoned Pro  Location: Bucks Registered: 25 Feb 2007 Posts: 2,437 Status: Offline |
Post #2
Try cleaning Or replacing the idle control valve |
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Posted 22nd Jun 2018 at 22:05
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rudolf
Seasoned Pro Location: Skelmersdale Registered: 07 Apr 2004 Posts: 2,769 Status: Offline |
Post #3
I've changed it recently and also repaired the ECU loom to it.Why would it affect running above idle? ________________________________________ S Reg Diablo standardsSpec SORNEDR Reg Nile standard spec written off then repaired X Reg Astor in need of TLC R Reg Nile to restore Set of Lions to fit. |
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Posted 22nd Jun 2018 at 22:07
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barrym
Senior User  Location: Westcliff-on-sea Registered: 26 Jun 2014 Posts: 502 Status: Offline |
Post #4
sounds like a possible lambda problem________________________________________ China D Turbo HDi daily chargerBlack Rallye occassional toy |
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Posted 22nd Jun 2018 at 22:54
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rudolf
Seasoned Pro Location: Skelmersdale Registered: 07 Apr 2004 Posts: 2,769 Status: Offline |
Post #5
Anyone got one in the North West?________________________________________ S Reg Diablo standardsSpec SORNEDR Reg Nile standard spec written off then repaired X Reg Astor in need of TLC R Reg Nile to restore Set of Lions to fit. |
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Posted 22nd Jun 2018 at 22:58
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mocinim
Seasoned Pro  Location: The Darkside of bedford :) Registered: 09 Jan 2015 Posts: 2,307 Status: Offline |
Post #6
Look for air leaks at the intake manifold and the throttle body ________________________________________ BLACK RALLYE - phoenixWHITE RALLYE - valliant http://public.servicebox.peugeot.com/ https://www.gov.uk/check-mot-history |
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Posted 23rd Jun 2018 at 01:04
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pug_306
Seasoned Pro  Location: Great Hockham Registered: 28 May 2013 Posts: 1,593 Status: Offline |
Post #7
quote: [quote="barrym"]sounds like a possible lambda problem I would try unplugging it see if it makes a difference. ________________________________________ 1998 Supercharged White Rallye1992 205 GTi6 205 Turbo 340bhp |
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Posted 23rd Jun 2018 at 07:42
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miki4
Regular  Location: Cologne Registered: 09 Nov 2015 Posts: 389 Status: Offline |
Post #8
quote: quote: sounds like a possible lambda problem I would try unplugging it see if it makes a difference. Ditto. Otherwise it could also be ignition related (most probably failing coil pack). |
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Posted 23rd Jun 2018 at 14:11
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Rich E
Forum Admin Location: Hertfordshire Registered: 27 Apr 2005 Posts: 7,757 Status: Offline |
Post #9
Unplugging the lambda sensor forces the ECU to switch to open loop fuelling so it doesn’t really help to conclusively prove the fault is with the lambda sensor. The fault could be elsewhere and the change in fuelling masks the problem, plus the recent MOT pass would suggest the lambda sensor is working correctly.Throttle position sensor (and wiring) is also a potential culprit for hesitation, engine speed stability and stuttering issues. Oh, and try an ECU reset... while there's a lot of old wives tales about false benefits of doing this it does do one useful thing - it resets the ICV back to it's home position when the ignition is next turned on. The true ICV position isn't tracked by the ECU. It's just assumed to be in the last position the ECU remembers. ________________________________________ Rich |
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Posted 23rd Jun 2018 at 14:26
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fatlapit
Seasoned Pro  Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #10
Injectors________________________________________ |
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Posted 23rd Jun 2018 at 17:32
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rudolf
Seasoned Pro Location: Skelmersdale Registered: 07 Apr 2004 Posts: 2,769 Status: Offline |
Post #11
quote: [quote="Rich E"]Unplugging the lambda sensor forces the ECU to switch to open loop fuelling so it doesn’t really help to conclusively prove the fault is with the lambda sensor. The fault could be elsewhere and the change in fuelling masks the problem, plus the recent MOT pass would suggest the lambda sensor is working correctly. Throttle position sensor (and wiring) is also a potential culprit for hesitation, engine speed stability and stuttering issues. Oh, and try an ECU reset... while there's a lot of old wives tales about false benefits of doing this it does do one useful thing - it resets the ICV back to it's home position when the ignition is next turned on. The true ICV position isn't tracked by the ECU. It's just assumed to be in the last position the ECU remembers. Thanks Rich Doesn't the ICV just move until the idle is correct? I did change the TPS when I last had idle problems and found the ICV wiring faulty. I'm beginning to suspect the wiring as I can't read ECU fault codes either. Anyone got a spare engine loom for an early phase 2? ________________________________________ S Reg Diablo standardsSpec SORNEDR Reg Nile standard spec written off then repaired X Reg Astor in need of TLC R Reg Nile to restore Set of Lions to fit. |
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Posted 24th Jun 2018 at 09:38
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