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Saxo Engine/Performance If you're interested in tuning Saxo engines, or if you need to know something which is engine related... this is the place for you.

 
 
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Old 12th May 2009, 10:18   #14
VTS123
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Join Date: Mar 2007
Location: Poole, Dorset
Posts: 447
Car(s): Mk1 VTS
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I'd try cleaning the MAP sensor. It's really easy to do and can make quite a difference to the idle.

It is on the left hand (as you look at the engine) rear corner of the plenum chamber (the blck box with '16V' on) and held on with a 5mm allen head screw.

Take it out and squirt right inside with WD40 for a few seconds a few times. Loads of oily gunk with probably come out.

The other thing that can improve the idle and is easy to do is to simply disconnect and reconnect all of the electical connectors to all of the engine sensors that you can easily get to a few times. This can improve electrical conductivity.

It may also be worth replacing the ECU coolant temperature sensor. This is quite cheap and is often the cause of poor idling.

Try resetting the ECU too - disconnect the battery for about an hour to do this.

Good luck!
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