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Model specific boards => Golf mk2 => Topic started by: GTIrl on 31 May 2005, 12:24
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does anyone know where to get a new one of these? my car has been behaving erratically for a while, sending me oh such a little crazy.... but today it is more strange and a friend said it might be this sensor. When you take it off the engine doesnt idle well but when you put it back it doesnt change. does anyone know how this effects the digifant computer if the blue sensor is coming in and out from a loose connection perhaps... if anyone has any ideas theyd be greatly appreciated, cheers
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Try GSF, they may well have what you need, http://www.gsfcarparts.com
I would have thought changing the sensor may solve the problem, either that or your Digifant is totally screwed, probably not the case tho!
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ok thanks. said friend can rolling road it next week. guess ill find out if indeed it is this sensor or not.Or the digifant is fookeroonied. anyone else had similar problems? :cry:
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I am having erratic idle problems. The car goes very well, however, the idle is very erratic. The ISV is fine. I am planning on changing the blue sensor as I have got a spare. I actually thought my problem was related to a blowing exhaust at the top end of the downpipe. Any thoughts?
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ooh-hoo! mine was a suspected exhaust manifold leek, but not so... not leeking or fluffing anywhere. my exhaust is horribly loud and boomy when its running badly when i accelerate. i was wondering if the sensor sends false information to the computer which then puts the timing out slightly or something which makes the exhaust sound louder? who knows...not me..
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Eratic idle can be the ISV, or in my case it was the idle switch. With the engine off check you can hear it click closed when you close the throttle. After I adjusted my switch (with a hammer :grin:) my idle has been rock steady :)
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It does click, so dont think its the idle switch. General driving is strange too, sometimes louder and more boomy than others.Tried driving it with the blue temp sensor disconnected. exhaust was even louder and boomy, so proof i suppose that a knackered sensor makes the exhaust louder, but not of a completely knackered sensor in my case, unless its half knackered!
ill report back if i ever find out what the problem is...
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Get a new temp sender then, or at least whip the old one out and clean the bottom of it with fine grit sandpaper till its nice n shiny :)
Edit: Thinking about it you'll probably have coolant coming out the hole so be ready with something to plug the hole, another sensor would be best :)
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Eratic idle can be the ISV, or in my case it was the idle switch. With the engine off check you can hear it click closed when you close the throttle. After I adjusted my switch (with a hammer :grin:) my idle has been rock steady :)
Mine %^&* ing does that all the time, i think i might have to get the "pursuader" on it too !
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Where's the idle switch on the 8 valve?
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Its located underneath the throttle body, so you have to take off the top half of the airbox and the intake boot. Good excuse to clean the throttle body though :smiley:
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I can see no mention of the idle switch in the Haynes manual and I am not sure what you mean about under the throttle body, what is it connected to?
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You need to look in the fuel & exhaust section for Digifant management, diagram 5.1 on page 4F.3. The switches are marked 4&5 and the throttle body is 6.
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rubjonny, I am totally lost, I have a green and a red Haynes manual and I cannot find the diagram you refer to. Please give me a page number from the manual. Are you referring to the throttle valve switches?
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Yeah the throttle valve switches 1 & 2, on page 4F3 in the red book. Testing is detailed in section 5, switch 1 is the idle switch (throttle closed) Part number 4 on diagram 5.1, which is underneath the throttle body in an extremly difficult to reach place :grin:
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rubjonny, I am completely lost and I am going to sleep on this one. I can find no page 4F3 in the red book.
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Its page 3 in the digifant section :) Turn to the Fuel and exhaust systems - Digifant fuel injection' section, which in my Red Haynes is section 4F or 'Chapter 4 part F'. Then go to 'Throttle valve switches - testing and adjustment' which in my book is part 5. In fact here is the bit I'm refering to:
(http://www.moddin.net/images/temp/golf/digifant-tbody.jpg)
5 Throttle valve switches - testing and adjustment
1 There are two throttle valve switches. Switch 1 monitors the throttle valve closed position and switch 2 monitors the throttle valve fully open position (see illustration).
2 Disconnect the supply plug from switch 2 and check that approximately 5 volts is available across the two terminals with the ignition switched on. If not, check the wiring from the control unit.
3 Connect an ohmmeter across the terminals of switch 2, then slowly open the throttle valve until the switch points close. The gap at the throttle lever stop must be 0.20 to 0.60 mm when the points close. If necessary, adjust the position of switch 1.
4 A piece of card marked with 10° is required to check switch 2. Attach the card to the first stage throttle valve shaft.
5 Fully open the throttle and align a datum with 0° on the card. Close the throttle by approximately 20°, then slowly open it until switch 2 points close. This should occur at 10° ± 2° before full throttle. If necessary, adjust the position of switch 2. Note that the throttle valve lever roller must contact the sloping part of switch 2.
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rubjonny, Thanks for that, I have now found it in my manual on a different page, my manual must be an older or newer version than yours.
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Just cured my poor idling, was the idle switch as rubjonny suggested. I had the same symptoms as a dodgy ISV, however, I was fairly confident the ISV was okay. I checked the idle switch and the wiring was knackered. One of the wires was corroded through and had snapped, now sorted :smiley:
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Coolio!