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| pommie |
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when i put the car in gear the idle drops to around 400 rpm
i have fitted an au tickford xr6 head cam etc with my standard ecu the idle drops to 600,the xr6 (el)ecu drops to 400 i have also bought and since sold an el fairmont ghia ecu as the car behaved the same so i am lost 
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| gutza |
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Hi There
When the car is warmed up, what rpm does it idle at in Neutral and Park ?? |
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| garsiph |
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Pommie
600 is where it should be. You have fitted a AU head to a EL engine. Contry to commen beleif on this site it will cause problems. Like you would expect in any major engine change. However this sounds like the XR Ecu cant controll the IAC. Or the TPS is out of alignment. Have you run the car with the XR ecu in Diagnostics mode ? |
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| pommie |
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hi when my car is in park it idles at around 750 ,but when i put it in drive it slowly drops down to just above 400 .
i am wondering could it be something to do with the auto? |
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| pommie |
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gutza wrote: Hi There
When the car is warmed up, what rpm does it idle at in Neutral and Park ?? hi when my car is in park it idles at around 750 ,but when i put it in drive it slowly drops down to just above 400 . i am wondering could it be something to do with the auto? |
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| pommie |
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garsiph wrote: Pommie
600 is where it should be. You have fitted a AU head to a EL engine. Contry to commen beleif on this site it will cause problems. Like you would expect in any major engine change. However this sounds like the XR Ecu cant controll the IAC. Or the TPS is out of alignment. Have you run the car with the XR ecu in Diagnostics mode ? hi how do you run the diagnostic mode |
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| FordFairmont |
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Posts: 6113 Joined: 8th May 2007 |
ok this is only an idea.....
disconnect the plug going to the Idle solenoid on top of the throttle body. When you start the car it will not hold idle, so bump up the throttle body screw on the side till it holds idle at around 800rpm. Before you turn the screw, mark it so you know what position it was in before. Now once it holds idle with the ISC disconnected put it in gear and see if it drops to 400 again, if it doesnt then you know the isc is too blame Dont forget to turn the screw back to where it was and reconnect the isc plug |
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| pommie |
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FordFairmont wrote: ok this is only an idea.....
disconnect the plug going to the Idle solenoid on top of the throttle body. When you start the car it will not hold idle, so bump up the throttle body screw on the side till it holds idle at around 800rpm. Before you turn the screw, mark it so you know what position it was in before. Now once it holds idle with the ISC disconnected put it in gear and see if it drops to 400 again, if it doesnt then you know the isc is too blame Dont forget to turn the screw back to where it was and reconnect the isc plug hi i have changed the isc.i put on the au one they both acted the same |
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| garsiph |
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Short the left hand Diagnostic connectors top and bottom pins out then start the engine.
After a little while the engine will idle hunt. thats the isc test if after 5 mins you dont get a idle hunt somthings wrong with the output. It may not be the ISC valve you may have a damaged harness or stuffed ECU |
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| pommie |
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garsiph wrote: Short the left hand Diagnostic connectors top and bottom pins out then start the engine.
After a little while the engine will idle hunt. thats the isc test if after 5 mins you dont get a idle hunt somthings wrong with the output. It may not be the ISC valve you may have a damaged harness or stuffed ECU i will give that a try tomorrow thanks |
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| pommie |
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pommie wrote: garsiph wrote: Short the left hand Diagnostic connectors top and bottom pins out then start the engine. After a little while the engine will idle hunt. thats the isc test if after 5 mins you dont get a idle hunt somthings wrong with the output. It may not be the ISC valve you may have a damaged harness or stuffed ECU i will give that a try tomorrow thanks hi there i tried that, it worked just fine cheers |
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