FSM A/C system PSIs
- Thread starter hearno
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toyo
Member
The pic you posted is part of the trouble shooting section. Toyota does not specify the proper gauge pressure. Not too many do because there's simply too much variables that go into play.
Are you installing freon on a completely empty system? Has it been vacuumed or not?
I just did a 2008 for a customer this week. Replaced her condenser due to a cap nail flying into it. Got that baby down to 39.8 degrees after I was finished.
Are you installing freon on a completely empty system? Has it been vacuumed or not?
I just did a 2008 for a customer this week. Replaced her condenser due to a cap nail flying into it. Got that baby down to 39.8 degrees after I was finished.
hearno
Senior Member
Awesome, thank you for that info.
It is not empty, it cools to 45 degrees but the compressor seems to cycle quicker than I would think is normal. With a thermometer in the vent, it cools to 45 then gets up to 50 then back down to 45 every 8 seconds or so. When I took the manifold gauges off it this afternoon and purged the gauge lines, a lot of dye shot out. I'm going to put a vacuum on the system tomorrow and then recharge it and see where it gets me.
preacher35
New member
39.8 degrees FAHRENHEIT? Damn! Why on earth can't I get that kind of temp in my '05 SE?
V8Man
Member
Sounds like your just low on 134a charge. First wash out your evaporator and make sure it clean. Run your system on high fan as low as you can watch for bubbles in the sight glass. Add freon if you see them.
toyo
Member
Answer these questions before and after you mess with it today if possible.
Ambient Temp:
Static Pressure:
Low Side:
High Side:
The 4R is kinda a pain to get the AC where it needs to be. I put 2 ounces more of freon in after the sight glass is clear.
When you check your vent temp which vent are you putting it in? I know on my car the vent to the left of the radio is a little cooler than the other front vent. They say to put it on Max, recirculate and the 2 front doors open. The front doors open really irk me. I believe the reason for this is so the cabin doesn't reach the set temp so quickly. I will close it all up and charge at a slow rate. Once I believe that I am at a full charge depending on my gauges/sight glass and temp I button it up.
Your also supposed to have the Rpm's at 1500. It really helps to pull the freon in and gets the compressor pumping. I take a rod about 2 feet long and put it between the gas pedal and my seat. I push my power seat button just a little bit to get to 1500 Rpm's. Works perfect.
Let us know what your gauge readings are. I'm curious.
Ambient Temp:
Static Pressure:
Low Side:
High Side:
The 4R is kinda a pain to get the AC where it needs to be. I put 2 ounces more of freon in after the sight glass is clear.
When you check your vent temp which vent are you putting it in? I know on my car the vent to the left of the radio is a little cooler than the other front vent. They say to put it on Max, recirculate and the 2 front doors open. The front doors open really irk me. I believe the reason for this is so the cabin doesn't reach the set temp so quickly. I will close it all up and charge at a slow rate. Once I believe that I am at a full charge depending on my gauges/sight glass and temp I button it up.
Your also supposed to have the Rpm's at 1500. It really helps to pull the freon in and gets the compressor pumping. I take a rod about 2 feet long and put it between the gas pedal and my seat. I push my power seat button just a little bit to get to 1500 Rpm's. Works perfect.
Let us know what your gauge readings are. I'm curious.
toyo
Member
Preacher, Put your thermometer in the vent to the left of the radio. Put the fan speed at #1 or 2, idle at 1500 and see what you get.
You gotta remember when the fan is on high the air is going across the coil at such a fast rate it the coil doesn't have time to keep it cold. Kinda hard to explain. Try it and see what you get. Besides, how often do we drive around with the fan speed at full go?
hearno
Senior Member
according to the pressures listed in the manual 1.5-2.5 on low side which is where it's at and between 14-16 on the high where is also exactly where it's at.
my g/f held it at 1500 rpms
ambient was 75F or so.
no idea what static psi is
and here are the rest:
Last edited:
toyo
Member
according to the pressures listed in the manual 1.5-2.5 on low side which is where it's at and between 14-16 on the high where is also exactly where it's at.
my g/f held it at 1500 rpms
ambient was 75F or so.
no idea what static psi is
and here are the rest:
Static pressure is the reading with the system at ambient temp. Gauges hooked up and engine not running. The high and low side should be within 10 Psi of each other. I was just curious.
The reading look about right. The low side when it is properly filled does not usually show a psi reading very high like most other vehicles. I'm not too sure why. I pushed mine up to 30 and it was way too much freon, brought it back down.
How is it cooling now?
gshadow325
New member
[MENTION=97032]hearno[/MENTION] I have the fsm in my Google drive. Pm me with your email so I can share it with you
