over reving when at full temp
24 November 2010, 11:49 PM
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over reving when at full temp
hey guys im new here i have got a 1999 1.6 subaru impreza and have a problem with it when its idling on cold it sits on the revs as it should but as soon as it gets to ful temp it starts to really over rev itself if any one could give me any advice on what it could be id really appreciate it thanks . 
25 November 2010, 05:00 AM
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How is the idle controlled on your car? Is it with an idle speed control valve?
When this happens, usually the ISCV is dirty and gets stuck sometimes - however most times this will raise engine code 24 and you will have a check engine light along with the high idle.
Another possibility is that somehow the idle up and idle down wires to the ISCV could have been swapped around.
Remove your ISCV and clean it first then set the idle speed while warm. Also inspect the wiring to the ISCV for any shorts.
When this happens, usually the ISCV is dirty and gets stuck sometimes - however most times this will raise engine code 24 and you will have a check engine light along with the high idle.
Another possibility is that somehow the idle up and idle down wires to the ISCV could have been swapped around.
Remove your ISCV and clean it first then set the idle speed while warm. Also inspect the wiring to the ISCV for any shorts.
25 November 2010, 09:48 PM
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How is the idle controlled on your car? Is it with an idle speed control valve?
When this happens, usually the ISCV is dirty and gets stuck sometimes - however most times this will raise engine code 24 and you will have a check engine light along with the high idle.
Another possibility is that somehow the idle up and idle down wires to the ISCV could have been swapped around.
Remove your ISCV and clean it first then set the idle speed while warm. Also inspect the wiring to the ISCV for any shorts.
When this happens, usually the ISCV is dirty and gets stuck sometimes - however most times this will raise engine code 24 and you will have a check engine light along with the high idle.
Another possibility is that somehow the idle up and idle down wires to the ISCV could have been swapped around.
Remove your ISCV and clean it first then set the idle speed while warm. Also inspect the wiring to the ISCV for any shorts.
25 November 2010, 09:50 PM
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26 November 2010, 12:20 AM
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check the error codes.. see my website in the help pages for how to read the error codes
www.jollygreenmonster.co.uk
Simon
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26 November 2010, 07:12 PM
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check the error codes.. see my website in the help pages for how to read the error codes
www.jollygreenmonster.co.uk
Simon
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23 January 2011, 11:00 PM
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hi again guys just a bit of an update i have as you know replced the map sensor and i have also now replaced the idle control valve cleaned up all the intake pipes and still no luck with it atall any more ideas would great thanks again
24 January 2011, 06:46 PM
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yeah i have took his advice found out what the codes was and it come up to be code 24 which is the idle control system thats why i changed the idle control valve but it hasnt made any difference atall
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