Throttle body issues

Subjug4tor · 05-07-2008, 05:01 AM

well, my TPS has been cracked and thus not working correctly since i bought my supra a week ago, and i finally ordered a replacement today. (cost me $108

)

Anyway, it turns out the PO of my car (who apparently has the IQ of a retarded pebble... so many stupid things done to this car) had, rather than replace the TPS to fix the idle issue, turned the Idle screw ALL THE WAY IN. it still idles around 1000-900 no less.

Basically, I need to know where that screw should be set so that I can set my new TPS where it needs to be when it comes. can anybody help?

CyFi6 · 05-07-2008, 05:06 AM

just back it out some and do the tps, then screw it in however far it needs to be (after fully warmed and idleing) to idle around 750-800 rpm. Ive found that the ISCV has a pretty wide range of positions and can adjust for some minor changes

Subjug4tor · 05-07-2008, 05:10 AM

Thanks for the reply.

I was basically wondering if anyone knew about where the screw should sit in its sleeve thing, just so i have a rough starting point.

supramacist · 05-07-2008, 05:21 AM

Basically all the way in.

Maybe an decimeter above the actual nut.

Subjug4tor · 05-07-2008, 05:27 AM

thanks!

Once the parts come in, ill post back with the results

supramacist · 05-07-2008, 05:29 AM

Riiiiiiiiiiiiiiiiiiiiiiight.

This is going to throw your entire engine off.
It's not as lite as you seem to making it.

This could cost you a week of tunning if you aren't careful.

Subjug4tor · 05-07-2008, 05:45 AM

I dont see how it would be as hard as you seem to make it. I know how to adjust the TPS to be where it needs to be, its not hard to do. Its not like it can get any worse at this point, the current tps has the entire bottom clip broken off, so its being held on by one screw at the top. All im going to have to do is install the new TPS, adjust it so that it makes idle contact where it needs to, and then set my idle. The problem Im having now is that the TPS isnt making the idle circuit, so the computer reads part throttle all the time. Thats probably why I was running a little lean, and im sure its why my idle was abnormally high.

Basically, I install new TPS, set it, reset my computer, and set my idle. done.

supramacist · 05-07-2008, 02:44 PM

Just the tps being out of allignment and then being timed dude.

When you fix it you'll see. You'll be grinding out code 51's And then something else with all of it will go wrong.

That's cool though. I was just trying to help.

Subjug4tor · 05-08-2008, 09:26 PM

well the tps came in today, and i pulled out the old one, put the new one in and set it by ear live ive done before, fired her up and she runs great. my code 41 is gone, and no, i didnt get a code 51, so i now have no diagnostic codes showing. however, my idle is still a bit too high. it sits between 800-900 when its warmed up with the screw all the way in now.

i thought it might be the ISC, but the thing is that when i turn my AC on, it adjusts to compensate, like, my idle goes up for a second then right back to where it should be and stays there. basically it keeps my idle the same weather the AC is on or not. that makes me think that it is operating fine, but someone tell me if i'm wrong.

Im starting to suspect a leak in my piping more and more, the car has hardpiping and a beefier intercooler on it, so i suppose one of the connections may be leaking (though i tightened them all myself to make sure it wasnt leaking)

supramacist · 05-08-2008, 09:34 PM

Cool.

I just did the same thing and it messed up the entire thing.

05-07-2008, 05:01 AM	#1
Subjug4tor Stock Join Date: Apr 2008 Location: DFW Texas Posts: 16	Throttle body issues well, my TPS has been cracked and thus not working correctly since i bought my supra a week ago, and i finally ordered a replacement today. (cost me $108 ) Anyway, it turns out the PO of my car (who apparently has the IQ of a retarded pebble... so many stupid things done to this car) had, rather than replace the TPS to fix the idle issue, turned the Idle screw ALL THE WAY IN. it still idles around 1000-900 no less. Basically, I need to know where that screw should be set so that I can set my new TPS where it needs to be when it comes. can anybody help?

05-07-2008, 05:29 AM	#6
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Riiiiiiiiiiiiiiiiiiiiiiight. This is going to throw your entire engine off. It's not as lite as you seem to making it. This could cost you a week of tunning if you aren't careful. Last edited by supramacist; 05-07-2008 at 05:31 AM.

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05-07-2008, 05:06 AM	#2
CyFi6 3" Exhaust Join Date: Oct 2007 Location: SLO Posts: 234	just back it out some and do the tps, then screw it in however far it needs to be (after fully warmed and idleing) to idle around 750-800 rpm. Ive found that the ISCV has a pretty wide range of positions and can adjust for some minor changes

05-07-2008, 05:10 AM	#3
Subjug4tor Stock Join Date: Apr 2008 Location: DFW Texas Posts: 16	Thanks for the reply. I was basically wondering if anyone knew about where the screw should sit in its sleeve thing, just so i have a rough starting point.

05-07-2008, 05:21 AM	#4
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Basically all the way in. Maybe an decimeter above the actual nut.

05-07-2008, 05:27 AM	#5
Subjug4tor Stock Join Date: Apr 2008 Location: DFW Texas Posts: 16	thanks! Once the parts come in, ill post back with the results

05-07-2008, 05:45 AM	#7
Subjug4tor Stock Join Date: Apr 2008 Location: DFW Texas Posts: 16	I dont see how it would be as hard as you seem to make it. I know how to adjust the TPS to be where it needs to be, its not hard to do. Its not like it can get any worse at this point, the current tps has the entire bottom clip broken off, so its being held on by one screw at the top. All im going to have to do is install the new TPS, adjust it so that it makes idle contact where it needs to, and then set my idle. The problem Im having now is that the TPS isnt making the idle circuit, so the computer reads part throttle all the time. Thats probably why I was running a little lean, and im sure its why my idle was abnormally high. Basically, I install new TPS, set it, reset my computer, and set my idle. done.

05-07-2008, 02:44 PM	#8
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Just the tps being out of allignment and then being timed dude. When you fix it you'll see. You'll be grinding out code 51's And then something else with all of it will go wrong. That's cool though. I was just trying to help.

05-08-2008, 09:26 PM	#9
Subjug4tor Stock Join Date: Apr 2008 Location: DFW Texas Posts: 16	well the tps came in today, and i pulled out the old one, put the new one in and set it by ear live ive done before, fired her up and she runs great. my code 41 is gone, and no, i didnt get a code 51, so i now have no diagnostic codes showing. however, my idle is still a bit too high. it sits between 800-900 when its warmed up with the screw all the way in now. i thought it might be the ISC, but the thing is that when i turn my AC on, it adjusts to compensate, like, my idle goes up for a second then right back to where it should be and stays there. basically it keeps my idle the same weather the AC is on or not. that makes me think that it is operating fine, but someone tell me if i'm wrong. Im starting to suspect a leak in my piping more and more, the car has hardpiping and a beefier intercooler on it, so i suppose one of the connections may be leaking (though i tightened them all myself to make sure it wasnt leaking)

05-08-2008, 09:34 PM	#10
supramacist 1000whp postwhore Join Date: Apr 2007 Location: Escape from the Prison Planet Posts: 1,356	Cool. I just did the same thing and it messed up the entire thing.