Originally Posted by LafitteZ (Post 1799723)

Anybody else with any other ideas

Originally Posted by LafitteZ (Post 1799989)

Rob was suppose to talk to Jon about it. Did they come up with something?

Originally Posted by LafitteZ (Post 1800035)

Gtm sells the remedy but they blow the price up like crazy. They sell the shroud and fan set up.

Originally Posted by LafitteZ (Post 1800090)

Where do I get them? That's what I want to do.

Originally Posted by LafitteZ (Post 1796718)

I had the kit installed at z1 and the day I picked it up we started to have this problem. If at idle or slowly driving around like in traffic if the temperature outside gets hot the ac starts to blow hot air and the compressor doesnt seem to kick on like normal. I have a 34 row oil cooler and vis vented hood and we took the drip pans off so the vents were open and it seemed to help but that was in georgia and winter began right after that. Well ive since installed a csf radiator trying to prepare for the heat and humidity down here in NEW ORLEANS. Well the outside temps are in the 100 range and the ac is blowing hot a heck. The oil and water temps are even better then stock. Theres enough freon in the system so theres no leak or leaks so I dont know what else too do? Any ideas?

Originally Posted by LafitteZ (Post 1796935)

I didn't really ask. I just know they are in spec.

Originally Posted by LafitteZ (Post 1796939)

When it starts if I idle with the hood up it warms up but the compressor stays on. Once I start to roll or idle with the hood down it kicks off. At night or once it cools down outside it blows cold as ice.

Originally Posted by LafitteZ (Post 1797853)

I really dont think its the freon. My car did it before and now after a csf radiator. I wonder if theres some kind of thermostat or something thats reading the temps extremely high and kicking the compressor off? When its about 100 degrees out side my outside temp gauge reads like 110. Not sure if it has anything to do with it but just an idea.

Originally Posted by LafitteZ (Post 1797929)

Yep exactly. Its too hot and humid for this in louisiana. I even have a vented hood and aftermarket radiator and oil cooler and its still doing it. As long as im driving theres no problem. I try to drive around the mall or light traffic or anything like that then it blows hot. I can even hear the compressor not on because my idle is really low. When the compressor kicks on the idle usually kicks up a few rpms.

Originally Posted by LafitteZ (Post 1797964)

they must be on because the water temps are way down and stabilized.

Originally Posted by LafitteZ (Post 1798058)

wonder if it may need high output fans? Or mabe some kind of vents from the bottom of the car if its possible?

Originally Posted by LafitteZ (Post 1798777)

Yea they certainly don't like the heat. What about putting a larger single fan in front of the radiator or mabe behind the intercooler? Man I have to get this fixed.

Originally Posted by LafitteZ (Post 1798885)

Y'all are missing the point. The oil temps and water temps are better then stock. For instance 200 degree oil temp and water temp 3 dots left from the center and sitting in traffic the ac blows hot air. As soon as you going it still takes a few seconds before it starts to be cold again.

Originally Posted by LafitteZ (Post 1798891)

And most of us with the problem is with turbo set ups. Thanks for the links tho. Anything helps.

Originally Posted by LafitteZ (Post 1798987)

Talked to rob at z1. We are going to make a colder temp water thermostat. We're also going to take a mishimoto fan shroud and put some super high output fans. Didnt realize the fans on the vhr is the same on the de. They are crap.

Originally Posted by LafitteZ (Post 1799229)

Yea mishimoto thermostats are garbage so were going to use a nismo thermostat from the de 350z. We're going to use the fan shroud from the mishi Moto kit but were going to cut the holes to fit bigger fans and were going to use I think the name is sprall fans. One fan puts out twice as much cfm as both of our factory fans together. A bigger radiator may be a good fix but I already put a csf radiator and the temps are good with water and oil we need to get the air to start flowing to get the hot air between the intercooler and condenser moving while at idle.

Originally Posted by LafitteZ (Post 1800035)

Gtm sells the remedy but they blow the price up like crazy. They sell the shroud and fan set up.

Originally Posted by SS_Firehawk (Post 1797690)

I'm having this exact issue and am taking it in to the dealership to have it looked at. It will blow hot if I'm waiting at an on-ramp light, when I accelerate, or if I leave it sit for a few minutes. It takes me five minutes fighting with it until it starts working again. Yesterday was over 110 and it was a nightmare. My oil temps stabilized at about 190-195 driving around and would get to about 215-220 idling. Water "dots" didn't move. I didn't feel like pulling out Cipher to log the exact temps. It is occurring more often when it's warmer.

Originally Posted by Ron (Post 1802502)

Sam how does one check the high/low pressure on the system?

Originally Posted by SAM@GTM (Post 1802453)

The reason why I asked you to check the refrigerant high and low pressure is not to find out whether or not you have enough freon, but to really get a good idea of how the system is operating mechanically.

If you go to the doctor and you are feeling dizzy, what is the first thing they check? Your blood pressure!!!!! Checking the refrigerant pressure is the exact same thing. It has nothing to do with how much refrigerant there is. In fact, sometimes, having too much will cause problems. The pressure differential between the high and low sides must be within a certain range. If the pressures are out of spec, then there is a problem. Remember, the pressure is going to be related to the ambient temperature.

Once we are done with AC 101 basic testing, then we can move forward. If your AC high side pressure is higher than normal, then the factory ECU will shut down the system due to excessive pressure to protect the system. If your low side is too low, then the system will also shut off the AC. If your pressures are perfectly normal according to the ambient temperature you are in, then there could be a mechanical issue. Also, if your system has been disconnected for the radiator replacement or a turbo install, and the system was not vacuumed out, then that will kill your AC performance because moisture in the system will cause major problems. That's why you have a receiver dryer to keep the refrigerant free of moisture.

Originally Posted by SAM@GTM (Post 1802453)

Man, you are all over the place. I don't get you. You start a thread asking for help and we make a suggestion to try and figure out what is going on with the car and you come back with everything under the sun without diagnosing the problem. If you want to throw parts at the car without knowing the cause and the correction for the problem, be my guest. I can assure you that there is no connection between your A/C shutting off and having a twin turbo kit on the car.

Prime example right here:



This guy has an NA setup and no turbo kit, yet is experiencing the exact same problem. How do you explain that?

The reason why I asked you to check the refrigerant high and low pressure is not to find out whether or not you have enough freon, but to really get a good idea of how the system is operating mechanically.

If you go to the doctor and you are feeling dizzy, what is the first thing they check? Your blood pressure!!!!! Checking the refrigerant pressure is the exact same thing. It has nothing to do with how much refrigerant there is. In fact, sometimes, having too much will cause problems. The pressure differential between the high and low sides must be within a certain range. If the pressures are out of spec, then there is a problem. Remember, the pressure is going to be related to the ambient temperature.

Once we are done with AC 101 basic testing, then we can move forward. If your AC high side pressure is higher than normal, then the factory ECU will shut down the system due to excessive pressure to protect the system. If your low side is too low, then the system will also shut off the AC. If your pressures are perfectly normal according to the ambient temperature you are in, then there could be a mechanical issue. Also, if your system has been disconnected for the radiator replacement or a turbo install, and the system was not vacuumed out, then that will kill your AC performance because moisture in the system will cause major problems. That's why you have a receiver dryer to keep the refrigerant free of moisture.

So, throwing parts at the car is not the answer. Get it diagnosed correctly. The stock system is tiny and it doesn't take much for it to go out of range if there is a problem. The Stock fans are perfectly fine and more than capable of doing the job...especially for a daily driver.

Originally Posted by LafitteZ (Post 1802915)

If you read back I said I don't know what they are but according to the mechanic I went to they looked fine. I'm not a mechanic or specialist. I just live in a place where there are not gtms, z1s or forged performances any where near me. Iv tryed to get in touch with people at gtm on the phone and on here before with no answer so my best is to try to converse with people on here just to figure out the problem. I may seem like a 1 grader of car lingo but I'm trying to do my best with what I have meanwhile sweating my *** off for 60 miles round trip to work and home. A little frustrating when I have to wait days at a time to get any usable feedback. I don't have time to call a place 100 times a day and wait to get a o well leave your number and they'll call back only to get nothing. I respect you guys and I know you have other stuff to do to but I'm just doing the best I can with just my fellow forum members because there the only ones responding with something I can understand. If you guys can help me get this sorted out I'd greatly appreciate it.

Originally Posted by LafitteZ (Post 1803104)

Im also not saying the turbo kit is faulty. Im saying its kindve funny that alot of us where it is hot is having this problem. It happened to me the day i picked the car up last summer and its now happening again this summer. Its never happened every before this kit. What i meant by help was for one if you ever heard of this problem. So with that being said the ac pressures seem to be fine. I personally think it has to do with the heat build up between the radiator and fmic. I have a big 34 row oil cooler in there also. If its not a mechanical problem do you think it may be just an airflow problem?

Originally Posted by hindi1973 (Post 1802796)

sam i think low should be with in 32 to 35 psi a, and high 220 to 240psi ? correct ?

Originally Posted by SAM@GTM (Post 1803213)

It is hard enough to try and diagnose a problem over the internet, so in my opinion, the mechanic saying that it is fine, is not good enough. If he went through the trouble of hooking up the gauges, then what was the pressure like? What was the ambient temperature the day he checked the pressure? How cold was the A/C blowing out of the vent? All this information would help us help you.

As for us not calling you back, if you called once and for some reason we missed your call, call us again. I'm very accessible by phone.

Don't take this as me trying to give you a hard time, but everything I'm asking is for a good reason. There is a certain process of trying to diagnose a problem that must be done by the letter, otherwise you end up wasting a bunch of time and money.



I'm not taking what you posted as you saying that our kit is faulty, because there is no reason for the A/C to completely shut off even with a front mount intercooler and oil cooler in front of the condenser. Yes, it could hinder it a little on a super hot day, but what you are describing is that the A/C is completely shutting off and that is a big difference.

Here are some questions.

1) Was the engine removed from the car when the turbo kit was installed?
2) If yes, was the A/C system evacuated for a minimum of 45 minutes to an hour at 27inHg of vacuum?
3) If it was not done or there is a doubt that it was not done, then you should consider taking it to an A/C specialist and having them completely vacuum out the system and recharge it. That should run you less than $100 or so...much cheaper than throwing parts at the car.
4) Verify your coolant temperature even though keep in mind that the factory gauge is a dummy gauge and is not very accurate. You can't rely on how many dots you are seeing. Hook up your Cipher cable, drive your car and try to establish at what coolant temperature the vehicle is shutting off the A/C. Also, when the A/C shuts off, pull over, open the hood and see if your compressor is cycling and both of your fans are blowing on high speed. If the compressor is cycling and still there is no cold air, it could be as simple as moisture in the system or a problem with the receiver/dryer.

Do that and get back to us. These are simple things you can do easily to determine the root cause of the problem.

Sam

Originally Posted by elliotty (Post 1797560)

Very interesting thread! I have not had this problem. I have been driving in +/- 90 degree heat lately and have been ONLY turning on the AC when at a stop. No hot air for me...knock on wood.

Originally Posted by birdmanx1 (Post 1803744)

:confused: Elliotty

Great support on the part of the GTM team. Nonetheless, I can't help but file this as yet another potential cryptic issue related to the FI build.

I hope you do get your issue resolved in a prompt fashion LAFittez.

Originally Posted by Z eliminator (Post 1803849)

Have any of you guys checked the condition of the condenser coils to make sure that they are clean, there may be dirt on them causing a bad heat exchange, it does not take a lot of dirt to mess up an AC condenser from working to max capacity on a very hot and humid day.
I would also check the intercooler to make sure that it is clean as well.
Oil temps and high water temps in the car have no effect on the A/C system unless the cars ECU turns off the AC compressor as a way of stoping the heat transfer from the condenser to affect the temp of the air going into the rad.

Z

Originally Posted by LafitteZ (Post 1804046)

Cool ill do that too. Im going to take the bumper off tonite and make sure things are clean since I do a ton of driving. Im trying to find someone who i feel is qualified to work on it. Iv had bad experiences with mechanics saying they can work on a z but really cant. I have some z1 hoses and stuff to put on so I think im going to drain and refill the radiator and let someone do the vacuum thing on the ac just to make sure. See this is stuff I can relay to a mechanic so they can check. I drive up and I dont really know what all this is so I dont really know what to tell them to check or look for. Thanks for all of your help. If you have any more brain storms plz let me know.

Originally Posted by Mr&Mrs (Post 1805150)

Yes but dont use to much pressure or you will bend the fins.

Originally Posted by hindi1973 (Post 1827464)

hi guys can anyone post their expereince in hot states above 110f regarding the low side and high side ac pressure results ? i am limited at the time being for the high side pressure gauge and most shops around me only can see the low side which is approx 32 to 35 psi , but the ac still gets hot in stop go traffic . so before i take action with bigger than fans , i am doing sams advise ac 101 :tiphat:, i have a feeling the high side is either too high or too low , or the 32 psi low side is also too low for our 130f weather or gets too high when the compressor kicks in .

all your help is appreciated :tiphat:

brand new 2012 twinturbo 370z nismo , approx 40's row oil cooler ,csf radiator , distilled water with water wetter , coolent temp is either half exactly or one dot below , oil temps is usually 210 to 220 in our 130+f weather

Originally Posted by SAM@GTM (Post 1803213)

As for us not calling you back, if you called once and for some reason we missed your call, call us again. I'm very accessible by phone.

Sam

Originally Posted by hindi1973 (Post 1833222)

well i have an appointment at one of shops that have the gauge for both low and high side , i sat in the car for 45 min in 120f weather infront of the house and it was cold as hell till the oil temps reached 220 and the dots are in the middle and most it reaches is one dot past middle , so i guess when i go there i should wait till it starts reaching those temps and test it , because if they test while its cold it might not be too hig or too low , its a twinturbo setup so i yes their is a big as% intercooler and the filters are on the sides behind the bumper , the solution which alot agree on and its a fact twinturbo setups,turbos,superchargers on those cars need bigger fans period , stock ones are not doing the job so spal fans will be replaced soon with high cfm and another fan behind the cooler , all will be with a thermo swtich .
thank you for ur sharing and help , finally someone shared or said something . :tup:

Originally Posted by hindi1973 (Post 1833242)

jm1fd, wht pressure do u think the compressor will start cutting off if its too high or too low on the high or low side ?because from my knowldge the low should be 32 to 40 max and high side should be doublt the ambient temp the car is in so if its at 130f , the high side should be 260 to 300 max , but the qustion is wht pressures should we avoid leavin the car in