A/C system problem

[98gst14b]

I have a 95 gsx. The a/c worked fine before except it had a leak in the low pressure hose from the compressor to the evaporator. I just completed my six bolt swap and when I had the engine out I changed that line out, engine back in, fired it up, max a/c, filled with a can of pag100 oil, then two cans of freon. the clutch kicked in just as it should and the a/c got mildly cold for a minute then hot. Now it blows hot all the time, the low pressure seemed excessive at times so I purged a little out to bring it around 50 psi. still blows hot, both the low and high pressure lines are hotter than heck. After running awhile the clutch will kick out and wont re-engage, guessing because the a/c temp is high and shuts it down. Any ideas where to start guys? I have a limited knowledge in a/c systems. Is there a filter or orifice tube to check/clean anywhere? Thanks for your help.

 

[datbmac]

If possible check and see if you can get a set of a/c gauges but if not run your car about 1500 rmps and see it the a/c will get cold because at idle it is not spinning fast enough to make significant pressure for heat transfer. If that doens't work, check your airflow. Make sure the fans are running when the a/c is on and make sure that they are pulling the right amount of air, also do you have a fmic because a lot of people have problems with their a/c not working properly because of air flow.

 

[phunny]

I have a 95 gsx. The a/c worked fine before except it had a leak in the low pressure hose from the compressor to the evaporator. I just completed my six bolt swap and when I had the engine out I changed that line out, engine back in, fired it up, max a/c, filled with a can of pag100 oil, then two cans of freon. the clutch kicked in just as it should and the a/c got mildly cold for a minute then hot. Now it blows hot all the time, the low pressure seemed excessive at times so I purged a little out to bring it around 50 psi. still blows hot, both the low and high pressure lines are hotter than heck. After running awhile the clutch will kick out and wont re-engage, guessing because the a/c temp is high and shuts it down. Any ideas where to start guys? I have a limited knowledge in a/c systems. Is there a filter or orifice tube to check/clean anywhere? Thanks for your help.

So did you just add some oil and refrigerant and call it a day? 50 psi is high for that system and did you draw a vacuum before filling?

 

[97gst_spyder]

Come up to Lakeland sometime, I have an A/C mani, r134a hotshot, and 200 micron vacuum. Mine works great in this 95*+ heat.

 

[4g63Tpower]

When you changed out your low side line did you purge the A/C system so that no air was in the system? Also when you added more refrigerant did you look at the specs for how many pounds your vehicle is suppose to have? If you over pressurize your A/C system that can cause problems too. one last thing, where did you get your replacement low line from?if it was from a 1g dsm then that could be your problem because 1g cars used R12 refrigerant and 2g cars use R134a. You cannot mix the two together.

 

[98gst14b]

Yes I do have a fmic and it gets Pretty hot too. I did not pull vacuum but I have a vac pump and gauges in storage somewhere I'm gonna look today. The line was out of a 2 g. The charge I looked in the capacity spec and used two 3oz pag100 and two 12 oz r134a.

 

[phunny]

Yes I do have a fmic and it gets Pretty hot too. I did not pull vacuum but I have a vac pump and gauges in storage somewhere I'm gonna look today. The line was out of a 2 g. The charge I looked in the capacity spec and used two 3oz pag100 and two 12 oz r134a.

Without the right equipment it's a real pain and pretty much impossible to do. We charge $100 to pull a vacuum and refill the system, including some dye in case there is a leak. You'd save yourself time and money by just having it done. Those DIY kits are garbage.

 

[98gst14b]

I'll give it a shot at a local shop I guess, just hope theres no problems aka blockage/bad compressor.

Btw I went out and cranked her up and the ac was cold I'm gonna say the fmic is blocking some cooling action.