What they do

Sense and signal the ECU, changes in atmostpheric pressure and / or engine vacuum so the computer can control the fuel and ignition operation for varying

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What they do

Measure the fuel temperature at the rail thus determining the density of the fuel.

Welcome to the web site of Autoparts (S.Wales) Ltd. or APSW. Autoparts (S.Wales) Ltd. are the suppliers of car parts and auto refinishing produts to the motor trade and general public. Long time members of the Group Auto Union gives us the opportunity to stock and sell high quality products such as Fram filters, Quniton Hazell Automotive products and PPG at competitive prices. For more information on APSW and our history see the About Us section.

What do they do?

Measure air temperature in the intake manifold. The sensor's resistance changes as the temperature increases or decreases. The ECU receives this change in signal and adjusts the injector pulse width and fuel mixture accordingly.