ac components you MUST replace

[greenquark]

At this point I am going nuts. Is there any way to know whether the expansion valve is bad or the compressor is gone?

Any tips?

Point being: If I am pretty sure is the expansion valve, I might go for it. If it is the compressor I will finish the whole system :/

When the compressor was working and the AC was on. I pressed the valve on the high side and I got this on my fingers. It was liquid but it was not hot nor cold.

Any ideas?

[GTRON]

When the compressor was working and the AC was on. I pressed the valve on the high side and I got this on my fingers. It was liquid but it was not hot nor cold.

Any ideas?

That's normal.

When the compressor is running, do you get negative pressure on the low side?
That's how I knew my expansion valve was bad.

[greenquark]

That's normal.

When the compressor is running, do you get negative pressure on the low side?
That's how I knew my expansion valve was bad.

Waiting for good sets of manifold gauges...

What happened to the high pressure in your case? ....my low pressure goes almost to zero but not into the negative...i think

[Losiracer2]

its your expansion valve. Does your compressor lock up occasionally? if so, that also means there's a blockage, and the freon isn't circulating like it should.

Just get a new expansion valve, they're $27 from O'Reilly Auto Parts and it will do the trick. The only crappy part is you need to remove the evaporator to replace it since its housed behind the glovebox and on the evap.

Once I replaced mine, I had ice cold air in my 92LX, like 38 degrees cold even with R134a. It was well worth it.

[greenquark]

its your expansion valve. Does your compressor lock up occasionally? if so, that also means there's a blockage, and the freon isn't circulating like it should.

Just get a new expansion valve, they're $27 from O'Reilly Auto Parts and it will do the trick. The only crappy part is you need to remove the evaporator to replace it since its housed behind the glovebox and on the evap.

Once I replaced mine, I had ice cold air in my 92LX, like 38 degrees cold even with R134a. It was well worth it.

I took it apart already, cleaned everything up and put it back...I didn;t replace the TVx because up in Canada is so freaking expensive/time consuming to get things, I gave up.

I think as a project I will take everything down and as the DYI's
http://www.cb7tuner.com/vbb/showthread.php?t=165508

Do it Nice or Do it Twice ...:/ ..Imagine If I replace TVx then it doesn't work again....I will kick myself!!

[GTRON]

its your expansion valve. Does your compressor lock up occasionally? if so, that also means there's a blockage, and the freon isn't circulating like it should.

Just get a new expansion valve, they're $27 from O'Reilly Auto Parts and it will do the trick. The only crappy part is you need to remove the evaporator to replace it since its housed behind the glovebox and on the evap.

Once I replaced mine, I had ice cold air in my 92LX, like 38 degrees cold even with R134a. It was well worth it.

I got mine for $15 https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

It was slightly different than the original, but it went right in, and works great!

Also, changing the expansion valve wasn't to hard to do, it takes time, and if you don't break anything (grrrrr) it's straight forward!

[greenquark]

Now talking to a friend. He was pointing out that the high pressure port is AFTER the condenser ( just before the lines get into the car). And a blockage in the condenser would make the high line colder than ambient , and it is most likely than the expansion valve failure.