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Author Topic: Hunting idle  (Read 924 times)

Offline NewStu

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Hunting idle
« on: 08 December 2006, 13:02 »
My mates mk3 2.0 8v has developed a hunting idle. With an 8v id usually start by cleaning the isv but can actually see one on this motor. Then id change the infamous blue coolant sensor but again i cant see one. What do you recoment.

I also spotted one of them awfull air temp/mass meter resistor things. Maybe i best bin this. Its plugged into the sensor on the front side of the airbox.
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Offline rubjonny

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Re: Hunting idle
« Reply #1 on: 08 December 2006, 16:28 »
Bin the resistor, on a MK3 the ECU sensor is not blue, its a 4 pin jobber that also does the temp guage :)

Clean out the throttle body, and check the oil breather hoses arn't clogged up.  If its got an idle switch, make sure it clicks just as the throttle closes :)
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Offline ace

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Re: Hunting idle
« Reply #2 on: 08 December 2006, 19:04 »
yeah check all the breather pipes and throttle body. the 8v hasnt got an isv. had a similar problem in the summer after i serviced it. i changed the leads, plugs, coolant sensor and temp sensor. in the end i got the old plugs gave them a proper clean fitted them back in and the car was fine, perfect idling again.
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