LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

pic of TPS, but which one

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Old 07-13-05, 11:43 PM
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phillipin
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Ive read through lexls.com tutorials many a time, on the guide to adjusting the tps i see only one sensor on the front of the throttle body, i'm pretty sure that the sensor closer the to the manifold is the tps but can you guys clarify what the other is? looks the same, has the same adjustable setup.
Attached Thumbnails pic of TPS, but which one-throttlepositionsensor.jpg  
Old 07-13-05, 11:44 PM
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larger engine view, but look how clean my power steering reservoir is. hah
Attached Thumbnails pic of TPS, but which one-engine.jpg  
Old 07-15-05, 06:00 PM
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Originally Posted by phillipin
Ive read through lexls.com tutorials many a time, on the guide to adjusting the tps i see only one sensor on the front of the throttle body, i'm pretty sure that the sensor closer the to the manifold is the tps but can you guys clarify what the other is? looks the same, has the same adjustable setup.
Good question. You have a TRAC model so you have two sensors. The TPS is the one on the right of the throttle body in your pic.
Old 07-15-05, 06:05 PM
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Here I've circled it for ya..........
Attached Thumbnails pic of TPS, but which one-throttlepositionsensor2.jpg  
Old 07-15-05, 06:38 PM
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well now the only problem is removing the sripped screws, i tryed using pliars on the screw head, but no luck, i trued bonding the driver head to the screw and turning it, no luck.. grrrr

any suggestions
Old 07-17-05, 08:22 AM
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Bummer, those screws shouldn't be in so tight that they're stripped.....hmm. Maybe go over to Sears and buy a screw out set, hopefully that will work. Otherwise, keep at it with a pliers.
Old 07-17-05, 09:06 AM
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well i got the screws loose with a very sharp phillips head, but now the problem is their isnt enough to torque down the screws so if i gun the throttle quick the tps gos to max....but as an interesting observation if i set the cruise control and clance it the quick thottle snap turns the tps all the way down to 450-500 rpm idle, so i'm going to drive it on down to homedepot on my lunch break in about 50 minutes here and pick up some new screws, im either going for hex screws or 8mm head bolts. No more stripping ever again i hope. but when the tps was adjusted to 650rpm idle it was much smoother on the freeway and cruise control didnt jerk the car when it was cancled. Before adjustment my idle was probably around 480-500
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