RX - 1st Gen (1999-2003) Discussion topics related to the 1999 -2003 RX300 models

Rafael

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Old 08-27-11, 04:31 PM
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sifonter
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Question Rafael

Have a 1999 RX 300 and transmission is taking to long to shift, any suggestions, Does IAC valve have anything to do with it?
Old 08-27-11, 04:35 PM
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carguy07
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Nope, really only affects how it idles.

Is the fluid/filter fresh and clean?
Old 08-27-11, 04:52 PM
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fairly fresh fluid, but not the filter
Old 08-27-11, 05:39 PM
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hypervish
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Welcome to Club Lexus!

Reset the ECU, by pulling the battery cables for a few minutes. That should help.
Old 08-28-11, 04:34 PM
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Is your overdive on or off?
Old 08-28-11, 05:07 PM
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sifonter
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Default Shifting is still taking to long

Thanks for the tip, I disconnected the battery overnight got better but is still very loud it shifts but is still noisy. Do you have any other suggestions? I did shut off the O/D did better.
Old 08-28-11, 05:09 PM
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Off for now.
Old 09-13-11, 11:11 AM
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Default Thank you

Problem solved, Cat replaced and trans is behaving baby. However, found out that an exhaust mount needs to be replace it allows the cat to sit and prevents from moving freely. Does anyone know what am talking about? Looks like a motor mount but is by the exhaust and cat.
Old 09-13-11, 11:27 AM
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carguy07
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Originally Posted by sifonter
Problem solved, Cat replaced and trans is behaving baby. However, found out that an exhaust mount needs to be replace it allows the cat to sit and prevents from moving freely. Does anyone know what am talking about? Looks like a motor mount but is by the exhaust and cat.
Like this? https://www.clublexus.com/forums/rx-...pipe-leak.html

Just got mine welded up last week, so far so good.
Old 09-16-11, 05:32 PM
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sifonter
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Default Help Please

Just replaced the Cat on my 1999 RX300 . However I was having problem with the pickup and it was still struggling. Now I have the same code was P0420 Catalyste Sysytem Efficiency Beow Threshpld Bank 1 it also is says pending. Just paid over $200.00 for cat. Is it possible the NEW cat is bad?
Old 09-16-11, 06:21 PM
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hypervish
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That code is usually for the oxygen sensor after the cat. Usually the CAT isn't the issue. I had that code a year ago, and i fixed it by replacing the oxygen sensor after the cat with an oem dense one from amazon for only $65.
Old 09-16-11, 11:00 PM
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L3XOTIC
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YeP replace that 02 sensor and that code should be gone.
Old 09-27-11, 02:27 PM
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Default Shifting problem

Have replaced all O sensors (3) 2 cats and still having problem with car. Shift find from 1 to 2 gear however, as soon as I start going up an incline the car does not shift fast enough and then when it does, it starts to speed up and then slams into gear.
Old 10-03-11, 05:11 AM
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Default Problem Solved

Thank you all but the problem has been solved! See attach diagram the third Cat down stream just before the muffer was the problem. "http://www.RockAuto.com"
Attached Thumbnails Rafael-cat.jpg  
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