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Air mechanics

Asked by Basil Smidt

Recently I had my 1996 Daewoo Cielo fitted with an after-market airconditioning unit. Since it was fitted the car regularly stalls and has actually ground to a halt on at least four occasions while the airconditioning was on. When it has happened it has sounded like an old carby engine which has run out of fuel. The airconditioning people have told me it's a mechanical problem with the car, while my mechanic tells me it's a problem with the airconditioning unit.

Answered by CarsGuide

7 Mar 2003 Carsguide.com.au

There are a number of possible explanations, and all are linked to the airconditioning installation. Early Daewoos came fitted with much of the hardware needed for airconditioning and only needed some equipment such as the compressor and condenser and some hoses to complete the installation. Part of the package was an idle-stepper motor which is used to stabilise the idle when the airconditioning system is turned on. If that's not fitted, or not operating correctly, the idle will probably be too low and unstable, and the engine could stall as a result. Difficulties restarting could be due to too much load being applied to the engine by the airconditioning system. Check the installation to make sure the electric fan is operating correctly. If it's not, it could result in too much pressure building up in the system, which in turn can increase the drain on the electrical system and make it more difficult to crank the engine over when starting. While these are some suggestions, I would strongly recommend that you take the car to an airconditioning expert and have the system checked.

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