I'm just over complicating things. It's really just a few wires, set the idle, and charge the system correctly.

The "working for 20 secs, then blowing hot" thing sounds exactly like the dual pressure switch. When you turn the AC on, the pressure fluctuates for the first few minutes. If the pressure at the sensor gets too high or low, it cuts the compressor. Check your freon levels again. If you wanted to rig it, you could just bypass the sensor (either unplug or short it).

There's also a thermo switch on the compressor that could cut out. If you've got oil in it, that shouldn't be the problem.

 

few more questions... even if your a\c is not on, is the compressor still consuming power??? i am guessing it is because the low idling feels like power is being drained from something... and with this compressor now plugged in i guess that is where its being drained... one thing i noticed is that everytime i turn on the car it has that low idle... when i turn on the a\c its cooold and it stays cold... then when i turn it off while iam driving the idle still stays low , few minutes later it idle back to 850 and vaccum is at 20 in hg once again... when i try turning on the a\c again it just blow the air from outside, with idle at perfect 850 ... its very erratic but there is a trend... any other suggestions?

 

The compressor isn't consuming power if the AC light isn't on. Sounds like you need to set the idle as described above. That should narrow your idle problem down to wiring, if it persists. As for the blowing hot air part, gotta be wiring or the dual pressure switch tripping.

 

thanks a bunch... i will work out this idle thing and see what happens... basically if i want a\c i have to keep it on and nto shut it off at all!!... or else i have to restart the car again.. idk its weird hehe

 

so yeah, sorry to be repetitious but the symptoms change by the day... during the day today if my idle would start dropping and vaccum started to drop, a little bit of cold air would be blowing into the car even with the a\c off and no fan blowing... basically whenever my idle drops i turn on the a\c and its cold, and then after a few minutes it just blows cool air but not like ICE cold air... then my normal idle and vaccum will come back again, and then few minutes later its drops etc etc without even turning on the a\c..

 

Jonas, hose and hydraulics ?? Location and contact info? If I can''t sell my convertible I i'll need to get a few lines made up. I just need a few new lines, new dryer, charge and I'm good to go.

 

dude, after diagnosing and referring to your threads alot... i am like almost positive its the dual rpessure switch... how exactly do i go about fixing this??

its strange because a\c was fine back when i had the ka in... idk what would have really cause it to go bad..

 

Either the dual pressure switch is bad, or it's working correctly. In the latter case, that means you either have too much, or not enough freon. That is also in line with the idling problem, since very high/low pressure makes it harder to turn the compressor, ie: more load on the engine.

 

ok ... brougt this back to life but i tried a few things...

right now i have the a\c working... what i had to do was get a power source for the a\c pump... for some reason power was being lost somehow... so i found a power source and put a switch on it just in case...

so now the air blows cool... but not COOOLD... so what suggestions do you guys have for that matter??

i will assume improper charging... but i checked twice and it was perfectly fine...

next when a\c goes on the idle drops... shouldn't it automatically go up ????

thats basically it though... i shouldnt run into any problems with having stock radiator and fan right??? florida is brutally hot after all..

 

Acutally Martin told me that the a/c would eat up the idle, so it would be a good idea to raise the idle a few notches, possibly around 1k. You wont really eat up any gas and when you start the a/c it'll idle right were it should. I wouldnt see why the stock radiator and shroud wouldnt work with a/c, as thats how they come equipped from the factory, but you have to also factor in the type of heat where in. I would run it but keep a close eye on the temp gauge.

If you are running a SR a/c compressor I beleive these units dont as cold as the KA unit do because they are also fitted from the factory as a R12 compressor and we use R134 which isnt as cold as R12. Not 100% sure, but I had a discussion with TampaLinc(Lincoln)about this and he was saying how much colder a friend of his SR powered 240 with KA compressor was compared to his. Considering he took all the correct steps in installing the system with new dryer, tube, proper evac and fill.

You might also want to consider that your not moving as much air as dual fans would move, so that might also play a role.