Air injection pipes and valves are part of the emission systems of a car. They are used to inject additional air into the combustion camber. If you are having problems passing a Smog test this may be part of the problem.
Similar to the auxiliary air valve, the idle control valve control valve adjusts and maintains the proper idle for the car whether it's cold or hot. Based on temperature sensors in the engine, the valve opens automatically to allow more airflow into the engine while cold, essentially like a choke on an old carburetor, keeping the engine supplied with more air until it reaches a certain temperature. If the unit goes bad, it can cause rich running, idle fluctuation and hard starting.
There are a variety of control units through out your car; they utilize various electronic signals to control certain operations of the vehicle. Pelican offers a wide selection of engine control units.
This site was designed and produced solely by Pelican Parts. Pelican Parts is not associated with Porsche Cars North America in any manner, except for a mutual appreciation and love of the cars. All pictures and references to the Porsche name, and the car names and shapes are for restoration reference only, and do not imply any association with Porsche. Pelican Parts is not responsible for any typographical errors contained within the site. Information and technical articles within this website are for reference only. Consult authorized factory manuals when performing repair procedures. By entering this site, you agree to hold Pelican Parts free from any liability arising out of the use of any information contained within.