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 Posted: Thu Mar 24, 2011 4:19 am |
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Joined: Dec 16, 2010
Posts: 1533
Trade Rating: +10
Location: UK
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ok so, this month ive had an annoying problem develop,
2001 reg (y) peugeot 206 1.4 8v petrol
1) when im driving along and clutch in to change gear the revs drop very slowly and pause at 2000rpm for a few seconds before comming to idle. once they are at idle they are steady, no fluctuation, it holds the idle perfectly.
2) when im driving along and i am stopping at traffic lights, when i clutch in and brake the revs 'bounce' up and down before comming to idle.
this only happens when im clutched in and braking to come to a complete stop. if im just operating the brake while in gear they dont bounce, if im just clutched in and not braking, they dont bounce but take forever to drop down to idle.
3) sometimes during problem 2 the 'bouncing' revs bounce so far below idle before they settle i.e as low as 200 revs that the engine gracefully cuts out, no warning.
when driving in gear the engines fine, pulls hard, sounds fine
no codes stored, no EML.
the revving problem is the same whether the engine is hot or cold, the bouncing rev problem when braking is worse when the engines warm (maybe this is because the automatic choke isnt on when the engines warm so the idles lower so its easier to cut out?)
i think that its probably got something to do with the throttle body or one of the sensors around that area, idle control valve, MAP, throttle position sensor? maybe its a mechanical probably and the throttle body isnt closing fully when i let my foot off causing the revs to keep artifically high? at quick inspection it looks like its working fine, but you never know lol
opinions greatly appreciated people 
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| Please Dont take any of my posts as written fact. They are simply my opinion and although to the best of my knowledge true, the information within them may well be incorrect.
Any work you undertake as a result of my posts is done so at your own risk | |
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Last edited by MrrNoName on Thu Mar 24, 2011 4:22 am; edited 1 time in total
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Posted: Thu Mar 24, 2011 4:21 am |
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Joined: Feb 11, 2010
Posts: 242
Trade Rating: 0
Location: swadlincote
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thrust bearing maybe?
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Posted: Thu Mar 24, 2011 4:22 am |
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Joined: Feb 08, 2010
Posts: 6055
Trade Rating: +53
Location: Salisbury / New Forest
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Sounds similar to the problem I had in the GTi.
I cleaned the ICV, throttle body, swapped the MAP sensor, new lambda sensor & bled the coolant system.
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Posted: Thu Mar 24, 2011 4:50 am |
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Joined: Jan 07, 2011
Posts: 224
Trade Rating: +3
Location: Leyland, Lancashire
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sounds like idle control valve...
but before ya go spending ya money get a compressor and blast air through the engine bay fuse box, might have water in there. i thought my idle control valve had gone once but it was water int fuse box. blasted it out and it stopped straight away!
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Posted: Thu Mar 24, 2011 4:53 am |
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Joined: Feb 07, 2010
Posts: 507
Trade Rating: +9
Location: Solihull, Birmingham
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its sound like similar issue i had an ICV... just clean it see if its any improvement. fails it need a new ICV
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Posted: Thu Mar 24, 2011 4:56 am |
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Joined: Feb 11, 2010
Posts: 406
Trade Rating: +1
Location: Peterborough
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i say its the idle control valve - its having trouble coming down from speed and settling, hence Idle control valve.
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Posted: Thu Mar 24, 2011 5:06 am |
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Joined: Feb 07, 2010
Posts: 5575
Trade Rating: +33
Location: Moscow
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I'd also say ICV. Give it a clean and see what its like then.
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Posted: Thu Mar 24, 2011 5:33 am |
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Joined: Mar 29, 2010
Posts: 3977
Trade Rating: +15
Location: Halifax
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try the battery too. When my battery goes flat it struggles to catch idle when the revs drop. sometimes it bounces back up sometimes it just cuts out.
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Posted: Thu Mar 24, 2011 6:11 am |
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Joined: Nov 08, 2010
Posts: 55
Trade Rating: 0
Location: Chelmsford, Essex
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Similar problem with mine. Everytime it idled the revs just carried on dropping till engine died, as u said, with no warning. Cleaned out ICV and been fine ever since (touch wood) =]
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| Has gone to the dark side!!!
Now driving a Black Magic Skoda Fabia vRS | |
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Posted: Thu Mar 24, 2011 7:39 am |
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Joined: Dec 16, 2010
Posts: 1533
Trade Rating: +10
Location: UK
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it idle's fine, it almost seems as if braking somehow drags the revs below idle, it never stalls unless your braking, it might be an idle control valve problem though because the revs do drop really slowly
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| Please Dont take any of my posts as written fact. They are simply my opinion and although to the best of my knowledge true, the information within them may well be incorrect.
Any work you undertake as a result of my posts is done so at your own risk | |
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Posted: Thu Mar 24, 2011 9:29 am |
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Joined: Dec 16, 2010
Posts: 1533
Trade Rating: +10
Location: UK
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whats the best thing to clean the ICV with?
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| Please Dont take any of my posts as written fact. They are simply my opinion and although to the best of my knowledge true, the information within them may well be incorrect.
Any work you undertake as a result of my posts is done so at your own risk | |
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Posted: Thu Mar 24, 2011 10:16 am |
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Joined: Feb 07, 2010
Posts: 1792
Trade Rating: +12
Location: Bridgnorth, Nr Wolverhampton
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carb cleaner!
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Posted: Thu Mar 24, 2011 10:47 am |
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Joined: Dec 16, 2010
Posts: 1533
Trade Rating: +10
Location: UK
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| Please Dont take any of my posts as written fact. They are simply my opinion and although to the best of my knowledge true, the information within them may well be incorrect.
Any work you undertake as a result of my posts is done so at your own risk | |
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Posted: Thu Mar 24, 2011 10:50 am |
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Joined: Feb 07, 2010
Posts: 1792
Trade Rating: +12
Location: Bridgnorth, Nr Wolverhampton
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yup
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Posted: Thu Mar 24, 2011 10:52 am |
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Joined: Dec 16, 2010
Posts: 1533
Trade Rating: +10
Location: UK
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do i just spray it into the bit where the pole moves in and out? lol
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| Please Dont take any of my posts as written fact. They are simply my opinion and although to the best of my knowledge true, the information within them may well be incorrect.
Any work you undertake as a result of my posts is done so at your own risk | |
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