Hey guys,
I just recently bought a 2000 Ls400 and I’m loving the car so far. It came on aftermarket air suspension which is nice, but it seems to be the only thing causing problems. I have a pretty fast air leak that I’ve narrowed down but I still have some remaining questions that hopefully you experts can help answer. I’m pretty new to air ride, the kit is the Ksport Airtech Deluxe kit with two viair 444c compressors. I’ve found that the check valves from both compressors to the tank are bad and leak pretty fast, the tank loses about 30 psi over night. The tank’s pressure relief valve was also leaking when I found the tank filled at 220 psi(yikes) I took it down to 190psi and it seemed like the prv stopped leaking air out, but I’m still skeptical. This leads me to believe the tank pressure sensor is faulty as I’d be surprised if the tank was supposed to be filled to above 200psi. Not only does the tank lose pressure but the car will air itself out in the matter of about 2 hours. Would the faulty check valves cause the car to air itself out that fast even if there’s still 180 psi in the tank? I would think the tank has to have a lower psi than the bags for the air to start leaking back into the tank and out the compressors. Another detail is that the rear bags empty much faster than the front bags, front are filled to 140 psi and rears to 80 for drive height.
Sorry for the book of a post, any and all help is greatly appreciated since this is rather urgent!
I just recently bought a 2000 Ls400 and I’m loving the car so far. It came on aftermarket air suspension which is nice, but it seems to be the only thing causing problems. I have a pretty fast air leak that I’ve narrowed down but I still have some remaining questions that hopefully you experts can help answer. I’m pretty new to air ride, the kit is the Ksport Airtech Deluxe kit with two viair 444c compressors. I’ve found that the check valves from both compressors to the tank are bad and leak pretty fast, the tank loses about 30 psi over night. The tank’s pressure relief valve was also leaking when I found the tank filled at 220 psi(yikes) I took it down to 190psi and it seemed like the prv stopped leaking air out, but I’m still skeptical. This leads me to believe the tank pressure sensor is faulty as I’d be surprised if the tank was supposed to be filled to above 200psi. Not only does the tank lose pressure but the car will air itself out in the matter of about 2 hours. Would the faulty check valves cause the car to air itself out that fast even if there’s still 180 psi in the tank? I would think the tank has to have a lower psi than the bags for the air to start leaking back into the tank and out the compressors. Another detail is that the rear bags empty much faster than the front bags, front are filled to 140 psi and rears to 80 for drive height.
Sorry for the book of a post, any and all help is greatly appreciated since this is rather urgent!
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