Intermittent Poor Ride
02-08-11, 08:32 PM
#91
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It's at the dealership being diagnosed as we speak, and while there they also found a faulty fuel pump which is being replaced under warranty. I'll follow-up here on the ride situation once I get the GX back tomorrow.
02-10-11, 05:08 PM
#92
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Remember when mine was "fixed" a few months back? It's still not doing the "bottoming out" sensation for the most part, but when the fuel tank is near empty (1/4 tank or less) it does the bottoming-out sensation noticeably.
It's at the dealership being diagnosed as we speak, and while there they also found a faulty fuel pump which is being replaced under warranty. I'll follow-up here on the ride situation once I get the GX back tomorrow.
It's at the dealership being diagnosed as we speak, and while there they also found a faulty fuel pump which is being replaced under warranty. I'll follow-up here on the ride situation once I get the GX back tomorrow.
02-11-11, 10:02 PM
#93
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I did, yes. The fuel pump (actually, fuel pressure regulator) was taken care of without incident and was 100% covered under warranty.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
02-12-11, 05:47 AM
#94
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I did, yes. The fuel pump (actually, fuel pressure regulator) was taken care of without incident and was 100% covered under warranty.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
02-13-11, 03:25 PM
#95
RE: driveshaft replacement, I think I mentioned this in another thread, but I broke the bolts loose on my trailing arms and re-torqued them, at "ride height", and noticed a subtle but significant improvement in ride. The bushings visibly "snapped" into position when I broke the bolts loose.
02-13-11, 07:00 PM
#96
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RE: driveshaft replacement, I think I mentioned this in another thread, but I broke the bolts loose on my trailing arms and re-torqued them, at "ride height", and noticed a subtle but significant improvement in ride. The bushings visibly "snapped" into position when I broke the bolts loose.
02-15-11, 07:45 PM
#98
Chris, if you tend go the coil way, then you should do all four suggested. If you want to stick the OEM way, then replace the Compressor Solenoid, that's it, the job if you do it privately would be around 1-2 hours, provided he is pro. The stealership would rip your purse for 1000/- plus #$%^& and free cookies and coffee.
02-16-11, 07:42 PM
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Chris, if you tend go the coil way, then you should do all four suggested. If you want to stick the OEM way, then replace the Compressor Solenoid, that's it, the job if you do it privately would be around 1-2 hours, provided he is pro. The stealership would rip your purse for 1000/- plus #$%^& and free cookies and coffee.
02-17-11, 02:59 PM
#100
I did, yes. The fuel pump (actually, fuel pressure regulator) was taken care of without incident and was 100% covered under warranty.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
The "bottoming out" sensation? I had a tech take a ride with me and he acknowledged it was present and pretty harsh (only when the tank is nearly empty - otherwise it's not noticeable). They kept the truck for two days, and I was told they were waiting on a word back from Lexus because they didn't know what else they could do - previously, they'd replaced the shocks, replaced the height sensors, and even corrected the whole 'oops-we-tightened-everything-while-on-the-rack-and-it-should-be-done-on-the-ground' thing, and now they were stumped as to what else they could do to make the ride better.
I picked up the truck and a day later, heard from the dealership that Lexus did not have any additional info or suggestions.
So basically, it sounds like mine is as about as best as it can get - no bottoming-out unless 1/4 tank or less. And even then it only occurs when going over bumps really slowly.
02-19-11, 07:43 PM
#101
Chris, sorry I was on travel....if you could go to the auto zone, and see if a error is stored in the ECM C1735, sometimes this error code, will generate a flashing lite on your cluster and sometimes not. It is related to the Vehicle Height Control System, And the fault code is Exhaust Solenoid Valve Circuit. Due to moisture intrusion, most of the 2003 and 2004 models have been effected with the solenoid and Lexus brought in a new design to the solenoid and avoid the moisture intrusion. The part number is 48910-60020. If your VIN production is after these JTJBT20X840057316, then you have to change regardless of the fault, This is the Compressor Height Control Assembly. Toyota Released a TSB to this effect - SU002-05. if you are under Comprehensive Warranty, this should be done free, if not you may have to pay for it. The job involves 25 mts, you can do it yoruself,just basic tooling required.
02-19-11, 09:50 PM
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Chris, sorry I was on travel....if you could go to the auto zone, and see if a error is stored in the ECM C1735, sometimes this error code, will generate a flashing lite on your cluster and sometimes not. It is related to the Vehicle Height Control System, And the fault code is Exhaust Solenoid Valve Circuit. Due to moisture intrusion, most of the 2003 and 2004 models have been effected with the solenoid and Lexus brought in a new design to the solenoid and avoid the moisture intrusion. The part number is 48910-60020. If your VIN production is after these JTJBT20X840057316, then you have to change regardless of the fault, This is the Compressor Height Control Assembly. Toyota Released a TSB to this effect - SU002-05. if you are under Comprehensive Warranty, this should be done free, if not you may have to pay for it. The job involves 25 mts, you can do it yoruself,just basic tooling required.
02-20-11, 03:03 AM
#103
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02-20-11, 10:20 AM
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One more question mann777, which part of the air suspension determines the compression and rebound? shocks or air bags or combination? seems like the shocks would prevent the bottoming or the excessive rebounding, right?
02-20-11, 10:27 AM
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