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Unfindable leak

guntherx on Mon April 14, 2008 11:50 AM User is offline

Year: 1999
Make: chry
Model: t&c
Engine Size: 3.8
Refrigerant Type: 134
Country of Origin: United States

i have been trying to locate a leak on a 99 town 7 country. i was using a cps leak detector before it crapped out and switched to pressurizing it with nitrogen and using an utrasonic. i cannot find a leak anywhere and yet the system looses 50% of the charge within a few days. i am debating on purchasing a uv kit, but wondered how it would work trying to indetify leaks in the 2 evaportators if you cannot see in them. any ideas?
secondly, is there a component that is prone to leaking on these vehicles?

mk378 on Mon April 14, 2008 1:27 PM User is offline

Dye will sometimes make its way to the evaporator drain but only after operating the system for a while with a full charge and condensing enough water to flush it thru. A refrigerant electronic detector is better for finding evaporator leaks. Can't really blame the car that your leak detector quit.

GM Tech on Mon April 14, 2008 4:30 PM User is offline

Your vehicle is well known for front evap leaks........

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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......

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