VW high side r-134a connections

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JHZR2

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Is there something to vw high side adapters? I have a set of 134a gauges, high and low work perfect on domestic, Japanese and euro vehicles from many manufacturers, no issues. Try to put them on the high side of my wife's 08 rabbit, it just spews refrigerant. If I keep it pressed down by hand it reads and doesn't leak, but the coupling won't catch and hold. Worked perfect before and after I tried it on the rabbit, so it's not the coupling... Low side is perfect too.

It almost seems like the male end on the car needs to be longer. If I press the female end on and keep it pressed down, no leaks... So it's failing to latch. No idea why.

I've never had to add or check this car before as its only an 08. This is very annoying. Any ideas? Anyone else see this or know of a workaround?

The wife thinks the car isn't as cool as t should be, and iirc it is putting out air in the 50s. Added some to take the low side to around 36 psi, and it dropped to low 40s, but can't get a good high side reading (holding it on, it seems to be in the 160-175 range), so I think it's good and she told me she thought it was cold when she was holding it at 2000rpm. Good enough for me!
 
I had that happen to me on a Dodge, it just would not catch on that car. I ended up using a different connector off another set of gauges and it worked. I have no idea why the difference, it was your typical fitting, nothing special. Used my gauges again after that car was done. HTH
 
Originally Posted By: Chris142
Supposed to all be the same fittings
. Maybe yours has a nick on it?


Doesn't look like it. Looks clean and brand new.

I wonder if I can get an extender or something for a high side fitting, just to use to read pressures if/when I do again...
 
Just remember the VW compressor is self modulating based on outdoor temp/load. It doesn't cycle. So if it is mild outside it will not be at 100% capacity with the fan on low, theoretically at least.
 
Yeah that doesn't help with air outlet temps though, she thought they we too high.

May just take it somewhere for an evac, then I'll vac and refill by mass.
 
Coupled with the fact that the 2008 has climatic control maybe the blend doors went wonky. I can offer to scan it with VCDS and see. I am not sure if they started measuring A/C pressure yet or not. I do know that it should have an electronic control valve on the compressor.
 
I may take you up on that - were in the Stroudsburg area regularly.
 
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