cashewsdinner Posted September 26 Share Posted September 26 I now own a malfunctioning air temperature sensor and am seeking to get a replacement, or an alternate solution, since the original model is no longer manufactured. The automobile operates well while disconnected; however, it performs poorly when connected to a power source. Link to comment Share on other sites More sharing options...
cashewsdinner Posted September 26 Author Share Posted September 26 Seeking an air charge temperature sensor compatible with the front of the air cleaner for a 1973 450 SLC, which is no longer in production. Is there an other option for its replacement? I anticipate that this forum will assist me with that. Thank you. Link to comment Share on other sites More sharing options...
dramarena Posted September 26 Share Posted September 26 Image and part number? Link to comment Share on other sites More sharing options...
cashewsdinner Posted September 26 Author Share Posted September 26 Part number unspecified. 1973 450SLC Link to comment Share on other sites More sharing options...
Misst Posted September 26 Share Posted September 26 Part number A0015428817 Link to comment Share on other sites More sharing options...
Kix Posted September 26 Share Posted September 26 The corresponding Bosch component number is 0280130006. It may facilitate the search process. Although it seems difficult to locate, it has been used in several automotive models and manufacturers, suggesting that it may be available in stock at some location. Link to comment Share on other sites More sharing options...
Grubscrew Posted September 26 Share Posted September 26 Is your intake sensor absent? My connection was severed. I measured it, and it aligns with the manufacturer specifications. Link to comment Share on other sites More sharing options...
cashewsdinner Posted September 26 Author Share Posted September 26 What is the perspective on operating a 1973 Mercedes 450 SLC without the air temperature sensor, given that it is nonfunctional? Link to comment Share on other sites More sharing options...
Kix Posted September 26 Share Posted September 26 Disconnecting or lacking an air temperature sensor will result in an excessively rich mixture. The sensor's resistance would thus be seen by the ECU as very high or infinite. The mixture becomes more concentrated at lower temperatures (increased resistance). When the temperature reaches around 70°F, the air temperature sensor seemingly does not influence the mixture, and the vehicle will operate correctly if all other components of the mixture management system are functioning properly. In warm climates where ambient air temperatures are consistently elevated, the air temperature sensor may be of little use. Nonetheless, the coolant sensor is present! Link to comment Share on other sites More sharing options...
Misst Posted September 26 Share Posted September 26 The specifications are found in the service handbook, if I recall correctly. In an emergency, a potentiometer installed under the dashboard may serve as a replacement, if it has a similar resistance range. A skilled driver might adjust the mixture somewhat while driving if desired, or just configure it to correspond with the day's ambient temperature. Link to comment Share on other sites More sharing options...
Kix Posted September 26 Share Posted September 26 NTC resistors are readily accessible. They are typically rated at 25°C. Selecting one with a 250-ohm rating should be appropriate. Some are rather little and may be affixed straight via the air cleaner aperture. Alternatively, disassemble the defective resistor and integrate it into the probe. Selecting the optimal resistor exceeds my financial capacity. Perhaps one of our electronics experts might assist. Link to comment Share on other sites More sharing options...
Kix Posted September 26 Share Posted September 26 https://www.ametherm.com/thermistor/select-an-ntc-thermistor Link to comment Share on other sites More sharing options...
Kix Posted September 26 Share Posted September 26 They want the whole specifications for the original, presumably because, as I understand, a minimal current is sent via the sensor. Link to comment Share on other sites More sharing options...
DarsteMyst Posted September 26 Share Posted September 26 Are you referring to the air temperature sensor, specifically the A/C switch equipped with a slender capillary tube that is placed into the evaporator? Link to comment Share on other sites More sharing options...
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