darimura

First Gen AC question: About 18 months ago I did a overhaul of my AC system, New Denso compressor, Drier, evaporator and expansion valve. With all these parts changed I opted to charge with R134 freon. since then everything was ok except for the other day it just blew warm air and the ac switch was flashing (possible locked compressor) then the next day it did the same thing but I could hear the pump clutch grab the compressor and then the clutch would release, I did this 3 times all with warm air coming from the vents. So I then moved the car to my garage for further diagnosing. a couple of days had passed with the car sitting in the garage. I started the car and the AC pump kicked in and stayed on with cold air coming from the vents. I placed the AC controls into diagnose mode and the code was code 00 (based on the chart to be normal). The only thing that is odd is that the car had its problems parked outside on a slightly steep incline, one day facing uphill and the other facing downhill. but the problems went away when parked for a couple of days on a flat garage surface. Is it possible that the freon has leaked to the point of being low level and the parking on the incline has affected this. thanks in advance

timmy0tool

iTrader: (7)

the ac is a closed system so it shouldn't matter the orientation of your parking.

this could be related as the car is known to have bad capacitors in the ECU, leading to other numerous problems including the ac compressor.

https://www.clublexus.com/forums/ls4...capacitor.html

darimura

That would make sense, The symptoms started during our record heat of the year, heat and electronics do not mix well

darimura

TimmyOtool.

thanks for your insight, After reading the link you sent me a little closer, I am not getting any of the type of symptoms listed on the link (Leaking ECU issue). Are there variations of the AC problems that can attributed to the bad ECU's?

python

iTrader: (4)

when u did the system did u flush/vacuum the system? have u hooked up gauges since then?

darimura

Python,

flush and vacuumed about 18 months ago, I have not checked pressure lately.

jmblimo

iTrader: (1)

Did you install the correct oil for R134A?