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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

86 Ford Ranger, A/C Conversion
Q: I recently converted my '86 Ford Ranger's A/C system to R-134a. I changed the compressor, accumulator, orifice tube, and compressor cycling switch. The system works fine at idle speed but the compressor cycles at three second intervals at highway speed. I know that this type of system is supposed to cycle, but is this the normal rate? What can I do to fix it if it is not?


A:
The A/C system in your vehicle is not supposed to cycle at that rate and the conversion to R-134a refrigerant is not the cause of the problem. If all the electrical components are in good condition, a rapidly cycling A/C system is an indication of a low charge of refrigerant or a restriction in the system. The A/C system operating pressures have to be monitored while driving the vehicle. With the right information you'll be able to identify what repairs are needed.

 
     
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