Engine Size: 4
Refrigerant Type: R134a
A follow-up to another question that I posted. I know that I have a leak big enough that I can hear a slight hiss and it won't hold vacuum at all. When an intake manifold has a vacuum leak you can spray cleaner and when the engine smooths out you've found the offending spot. Is it possible to do something similar with the ac system?
NO...but use a rubber hose to your good ear and scan the areas while it is hissing- Turn off all other background noise and you will soon locate it.
The number one A/C diagnostic tool there is- is to know how much refrigerant is in the system- this can only be done by recovering and weighing the refrigerant!!
Just a thought.... 65% of A/C failures in my 3200 car diagnostic database (GM vehicles) are due to loss of refrigerant due to a leak......
A leak that big might make it iffy to even use soap bubbles....do as detailed above. Also, when you get your hand or the rubber hose close to the leak, will likely alter the pitch or volume of the hiss.
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