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Adjusting Idle Speed 

 

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 Post subject: Adjusting Idle Speed
Posted: Thu Sep 18, 2008 8:08 pm 
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Trying to find a doco or something that will explain how to change the idle speed. I read somewhere ages ago that you have to remove something like the ISC? Dunno where that is though... can anyone direct me to a site or bit of info on adjusting the idle speed on an EL falcon or just give me a quick run down?
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Posted: Thu Sep 18, 2008 8:12 pm 
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usually its just a screw near the throttle body

 

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Posted: Thu Sep 18, 2008 8:14 pm 
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i found one that is just above the throttle body in close proximity to the throttle cable too but thought it might have been a screw to adjust the air/fuel mixture but that is all controlled by the ECU isnt it?

a doco would be great if there is on floating around somewhere?
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Posted: Thu Sep 18, 2008 8:18 pm 
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i belive the air/fuel is further back but i may be wrong

 

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Posted: Fri Sep 19, 2008 9:12 am 
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its not the black knob ontop of the ISC its a screw a little bit further down from memory.

someone might have a good picture of it for ya

 

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Posted: Fri Sep 19, 2008 10:29 am 
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dont know if this helps but on the early E series its a screw on the under right hand side of the throttle body which has a spring (?) on it. dunno if they have similar setup on the BBM though...sorry if this means nothing. i'd check right now for you if i owned one.

 

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Posted: Sat Sep 20, 2008 12:28 am 
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1) Remove ISC plug and place 0.75mm feeler gauge in between stop tab and throttle lever.
2) Put engine in diagnostic mode. Short far left top and bottom pins on plug and start engine.
3) Now wait approx 2mins until the engine stumbles and check to see whether the engine idle is at 700rpm(+-50rpm)

If it is not within specs then just turn the throttle blade adjusting thread screw with a small flat blade screwdriver. It helps putting the dash in diagnostic mode so you can get a digital readout of the tacho if you like this process being very accurate.

cheers.....................

 

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Posted: Sat Sep 20, 2008 12:29 pm 
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EL__Fairmont wrote:
1) Remove ISC plug and place 0.75mm feeler gauge in between stop tab and throttle lever.
2) Put engine in diagnostic mode. Short far left top and bottom pins on plug and start engine.
3) Now wait approx 2mins until the engine stumbles and check to see whether the engine idle is at 700rpm(+-50rpm)

If it is not within specs then just turn the throttle blade adjusting thread screw with a small flat blade screwdriver. It helps putting the dash in diagnostic mode so you can get a digital readout of the tacho if you like this process being very accurate.

cheers.....................


Spot on EL_Fairmont but the engine must be at operating temperature.
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