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Author Topic: rough idle. done the checks but still a problem  (Read 1921 times)

Offline Mr Blue

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rough idle. done the checks but still a problem
« on: 26 December 2006, 16:04 »
8v pb engine

revs go up/down when at the lights

checked for air leaks etc etc

adjusted the idle

cleaned out throttle blaa de blaa...

cleaned the isv out with petrol


ive always managed to sort the problem on my mk2 but this has got me.

Im sure im missing something :rolleyes:

I dont have a spare isv lying about so cant test that :sad:


any other tips? :smiley:
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Offline Agreeable Slick

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Re: rough idle. done the checks but still a problem
« Reply #1 on: 26 December 2006, 16:13 »
Buy a ford and stop b!tching about your golfs.  :wink: :grin:
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Offline Mr Blue

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Re: rough idle. done the checks but still a problem
« Reply #2 on: 26 December 2006, 17:24 »
Quote from: Slick#13 on 26 December 2006, 16:13
Buy a ford and stop b!tching about your golfs.  :wink: :grin:


should put this in the ''how to'' guide  :grin:
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Offline rubjonny

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Re: rough idle. done the checks but still a problem
« Reply #3 on: 27 December 2006, 10:34 »
Sounds like the throttle cable is too tight, the wiring to your throttle switches has snapped, or the switch itself isn't clicking when the throttle is closed.  Have a read of my MK2 digifant tuneup guide ;)
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Offline coolrunnings

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Re: rough idle. done the checks but still a problem
« Reply #4 on: 27 December 2006, 21:03 »
Try your idle control valve. Remove it and clean with carb cleaner, even better if replaced £5 from vw. Use cotton buds to clean where the valve sits.( Also with carb cleaner)
Worked a treat on mine.
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Offline Brads MK2 GTI

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Re: rough idle. done the checks but still a problem
« Reply #5 on: 28 December 2006, 08:24 »
£5 for an idle control valve from VW? Quite sure about that sir?  :grin:
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Offline E405

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Re: rough idle. done the checks but still a problem
« Reply #6 on: 28 December 2006, 09:42 »
Worth trying the classic blue temp sensor replacement?
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Offline Mr Blue

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Re: rough idle. done the checks but still a problem
« Reply #7 on: 29 December 2006, 19:42 »
Quote from: rubjonny on 27 December 2006, 10:34
Sounds like the throttle cable is too tight, the wiring to your throttle switches has snapped, or the switch itself isn't clicking when the throttle is closed.  Have a read of my MK2 digifant tuneup guide ;)


this guy is a legend :cool:

Im guessing that there is a pin missing here...



Chers RJ
« Last Edit: 29 December 2006, 20:54 by Mr Blue »
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Offline rubjonny

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Re: rough idle. done the checks but still a problem
« Reply #8 on: 30 December 2006, 02:39 »
blue thats the wide open throttle switch, the idle switch is underneath :)
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Offline VapourTrails

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Re: rough idle. done the checks but still a problem
« Reply #9 on: 30 December 2006, 05:08 »
id go with replace isv on this one johnnys not often wrong but i had problems where at idle it would jump upto about 2000 rpm and sit there for no reason then slowly go back down on its own.
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