rlin78

I would make sure the new TPS is the same as the old one. I put in a new TPS, never had any problems, there's no calibration at all. Hope it helps.

If you do it on the low side, it is not dangerous. Use the side where you added the R132A. Using the high side can be very dangerous, I have no proof of that because I am too chicken to try it. :) Not to name any names to protect the innocents ;) , I know someone that had the same symtoms and he used a phillips screw driver to relief the pressure until the fan would continue to run. AC was blowing very cold. It is up to you, you can save your money or take it to a shop. I am not encouraging you to take a chance, you should "always" trust a licensed tech to work on your car...:whistles: Warning, reliefing your AC using the method mentioned here is illegal in most states, and should be discouraged. You could also be fined a large amount of money.

You might still have a little bit too much pressure in the system, is the AC compressor fan running or not? If it is not running or runs and then shuts off right away, that means the high pressure sensor is preventing it from running to protect the system. You need to "properly" reduce the pressure to normal pressure, then enjoy the cold air. Let us know how it works out.

Yes that's normal

llbouch, Good luck with your brake problem. I ended up taking it to the dealership, they used their diagnostic machine, told me there's nothing wrong. Then I took it in for the second time, they said it was the rear sensors, cost over $600. I ok the repair, they called me a couple days later, told me it was the sensor ring which was the whole axle. Final bill was around $1500. I called Lexus and told them it was a design flaw, but they said since the vehicle came from the north, it was rusted by salt, that's why it failed. I don't think something that was supposed to save you should fail like that and cost so much to repair. You might be better off pulling the fuse. I know I am probably not going to buy a used Lexus again.

I would take your car back. I have had a failed alternator, your battery light will come on if your alternator is not charging. 13.3 Volts is a little low, but why fix something that ain't broke? Also, you can get an alternator from partsamerica.com for a little over $100, takes about 30 mins to put in with simple tools. I did that and it was easy. They are raping you with $781 man.

I've used Amsoil ATF in my 99 RX300 for 1 year and about 10K miles. Don't really notice any difference in MPG or smoothness, but it gives me peace of mind that it protects my transmission better than non-synthetic. By the way, my car is at 100K miles with its original transmission---knocking on woods. :whistles:

Have you tried cleaning the iacv?

Go back to the shop and ask them what kind of fluid they put in your transmission. The Rx300 transmission calls for only Toyota IV fluid or equivalent, most shops don't carry it around.

I am thinking one of your ABS sensors or the ABS axle rotors (the teeth ring that ABS sensors use to detect wheel speed) is bad. The ABS sensors and axle rotors aren't cheap, you might want to try taking out the sensors and cleaning them. Or have an independent shop with experience about ABS troubleshooting help you out. I wouldn't recommend Lexus dealership because they charged me $1800 to fix an ABS problem. My car had the same symptoms while breaking, only difference is that you have a 2wd that ABS would kick in as part of the traction control while mine is a AWD which doesn't have traction control. My guess is it will cost you anywere from $600-1800 if you were to take it to Lexus. BTW, they will tell you there's nothing wrong with your car because they can't get a code from the computer initially untill you can physically prove to them that it happens. I don't like my Lexus dealership.

The ring that's broken is part of the drive shaft, they can't replace just the ring. So the cost for the part is $800, thanks to the nice engineering I guess. I am contacting Lexus to see if they can help out with the repair because this is a design problem, it deals with safety, I can't drive the car safely anymore....

Yes, the vehicle has been serviced by Lexus, the fluid was changed as part of the 90K service. It's not acceptable for something like a safety system to cost so much to repair.

Guys, I've posted before about my 99 RX300's brake is having pulse/vibration problem when I stepped on it. This is after replacing rotors, brake pads, and calipers. Well, after exhausting all options, I took it in to a Lexus dealership for repair. First they told me there's nothing wrong with the car because they couldn't read any codes from the ABS computer. Go figure. I wanted to tell them to go f** themselves. Then I took it in again, give them another chance, they said it was the ABS sensors. Would cost $600 to repair, so I gave them the go ahead to repair. But one day later they called me again and said that they found the problem to be the ABS ring or something like that, it would cost total of $1800 to repair because you have to replace the whole assembly. Do you guys have any advise for me? I know my car is pass warranty, but I am disappointed at the quality of Lexus. I am talking to a Customer relation's lady at the dealership, maybe she will help me out. But still, I am not very happy about the reliability of my RX300. My 99 Nissan Maxima has not given me many problems while the Rx300 has given me problems from brakes, alternator, to AC. Just feel like blowing off some stream.

I am having the same problem with my 1999 RX300, any recommendation? I added 1 can of R134A, made no difference.

Check the color of the transmission fluid, should be bright red. Check color of coolant, again, should be bright red. Check for any bodyworks or repairs, any body panel misalignment. Make sure AC works and should be ice cold, all the other eletronics works, little or no noise while running. it is really too late since you already paid for it or put a deposit down, but I would recommend against buying a car without first seeing it. Even though I have done it a couple of times, I got lucky. Bring a mechanic to look at the car is highly recommended. Best of luck to you, I think you will enjoy your RX300 if it checks out to be problem free.