Throttle cleaning-concerned about touching TPS.
#1
Driver School Candidate
Thread Starter
Throttle cleaning-concerned about touching TPS.
Hi all. I have a 90 LS and wanted to clean out the throttle body. I have searched and know how to clean the throttle. My question is about the throttle position sensor. I want to remove the throttle body to fully clean it. If I take the sensor off and on, will this get out of alignment? Or does it only sit in one way? I'm worried I will make things worse if I don't return the sensor to the correct position is all. The 2 screws that hold the sensor on the throttle body appear to allow adjustment. Thanks
#2
Racer
When you do this,please take pictures if you can.Thanks.
#3
Racer
Hi all. I have a 90 LS and wanted to clean out the throttle body. I have searched and know how to clean the throttle. My question is about the throttle position sensor. I want to remove the throttle body to fully clean it. If I take the sensor off and on, will this get out of alignment? Or does it only sit in one way? I'm worried I will make things worse if I don't return the sensor to the correct position is all. The 2 screws that hold the sensor on the throttle body appear to allow adjustment. Thanks
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dame3780 (06-13-18)
#4
Driver School Candidate
Thread Starter
I ended up taking it to Lexus since I needed an alignment too. They did both the alignment and throttle cleaning (fuel induction service). The throttle isn't sticking anymore but my idle is still low. The fun continues!
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dame3780 (06-20-18)
#7
Driver School Candidate
Thread Starter
Hi, yeah I did mention it. The tech said that the idle was low but it was running/sounding fine. I'm thinking they didn't have much experience with early LS's or they would have attempted to fix it. I will look into the cable more. I have read up on it and even seen diagram on adjusting it but I'm still not grasping how to do it lol. I think I need a video.
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#8
Moderator
Super simple. Loosen the 2 nuts with red dots. This will allow the threaded sleeve, cable passing through it, to move in the necessary direction to take up the slack. The sleeve will move by turning both nuts simultaneously in the same direction. Once the sleeve is where you want it, don't go too tight, tighten the 2 nuts.
#11
Driver School Candidate
Thread Starter
I just went out to adjust the cable. It was a little loose. I did as you mentioned. When I started it up, I noticed it turned on quicker when cold. Usually it would take a few seconds but it started quicker. RPM's at warm-up stage were 650-which was higher than before. However, once warmed up, it shot down to 250 (slightly higher than 200 before). Any idea on next steps?
#12
Racer
i'm not sure but does your 90 have an Idle Air Control Valve? I know in my Honda Accord (93) that it would get dirty over time and need cleaning out with some carb cleaner to bring the idle back up to where it needed to be. You can try servicing that part and see if that helps. At most, would cost $2 for a can of Carb cleaner at Walmart.
#13
Driver School Candidate
Thread Starter
It does have one. That's what I was thinking next as well. When I get some time I'll remove and clean it. Thanks for the suggestion-keep the thread updated after completion.
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