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help from Texas...... Cant hold vacuum

citadel on Fri July 10, 2009 11:56 PM User is offline

Year: 97
Make: toyota
Model: landcruiser
Engine Size: v6
Refrigerant Type: 134
Ambient Temp: 95
Pressure Low: na
Pressure High: na
Country of Origin: United States

hey guys...

1st post here... Hope someone can help....

Had the freon evacuated and just replaced my expansion valve and dryer on my truck.

while I was in there I flushed the evaporator and the condensor with a flush gun kit from Auto Zone.

The evaporator fins were really nasty so I used some AC evaporator cleaner then rinsed it with water to remove the reside.

I buttoned everything back up and hooked on the gauges to pull a vacuum....

I cant get a vacuum for some reason....

Left the vacumm pump on for 30 minutes and nothing.. maybe -5 at best...

I am used a vacuum pump from Auto Zone 1.5HP I think

I changed out all the o rings on the lines I removed as well...

I am thinking maybe I didnt get all the flush out of the evap and condensor. I could have used my compressed air on them a little longer maybe...

Any thoughts?

Chick on Sat July 11, 2009 6:51 AM User is offlineView users profile

First, yes, you can't use enough compressed air to remove the flush, when you think you're done, keep going.. Next, it's obvious that if it held refrigerant before, you have a massive leak at one of the connections you opened, go over them again, make sure the O rings weren't cut or damaged, or even fell off. You can hook up the vacuum pump to the gauge set and see if it pulls the gauges down while not connected to the cat to confirm it's working.. But it sounds like you have a loose connection, so much so that if you were to add a partial charge, you should hear it coming out.. Hope this helps..

Email: Chick


Freedoms just another word for nothing left to lose

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