TPS Mod: Idle not settling after over a week! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 02-08-2006, 12:56 AM   #1
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Default TPS Mod: Idle not settling after over a week!

I did the TPS mod as perscribed in the Techinfo. First time I did it I set the idle voltage to .70 with WOT at 4.32. I had to change it back because engine was idling at over 2000 rpm! Car was vibrating like crazy at the stop lights and I was worried I was going to bust the transmission and I got tired of fighting with the brake, especially if I had to make a sudden stop.

So last Monday I took it back down to .60, plugged in the battery after it was disconnected for over 15 minutes. Idle was more like 1500 rpm and I didnt have to worry about rear ending someone. Now comes today. Each day since last Monday I have at least 2 half hour trips, 3 of those days last week I had 3 half hour trips. That is more than enough time/engine cycles supposedly for the idle to settle back down. Well it has not. Ether this mod is nothing but hot air or something else is amuck.
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Old 02-08-2006, 02:22 AM   #2
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You must have the main butter fly valve of the throttle body open (slightly) when you set up the tps sensor. Remove your air intake and make sure the valve is closed before making adjustments.
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Old 02-08-2006, 04:39 PM   #3
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But doesn't adjusting the idle stop screw slightly open the butterfly valve anyway? Thats what is called for in the mod.
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Old 02-08-2006, 05:04 PM   #4
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Quote:
Originally Posted by Boreas
But doesn't adjusting the idle stop screw slightly open the butterfly valve anyway? Thats what is called for in the mod.
you are not supposed to touch the butterfly at all...you are just moving the postion of the SENSOR to read within range
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Old 02-08-2006, 05:46 PM   #5
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Quote:
As an addition to this mod, we are also adjusting the idle set position a little further open. While the PCM will learn the idle voltage and this will NOT raise idle speed, it will give you more throttle response as you initially step on the gas. This part of the mod is optional but if you have a stock throttle body high consider giving this a try!
From:
http://www.geocities.com/carnutguy/c...hancement.html

I wonder what that last pic on the bottom is supposed to show.

I had to do a forum search because you guys removed that article from techinfo. I guess you guys found out it was a fluke too but didnt bother to tell everyone else.

Reader beware, now I got to be more careful of any future "performance" articles I read here. Im reversing my settings tonight. This mod is
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Old 02-08-2006, 05:50 PM   #6
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Quote:
Originally Posted by Boreas
Quote:
As an addition to this mod, we are also adjusting the idle set position a little further open. While the PCM will learn the idle voltage and this will NOT raise idle speed, it will give you more throttle response as you initially step on the gas. This part of the mod is optional but if you have a stock throttle body high consider giving this a try!
From:
http://www.geocities.com/carnutguy/c...hancement.html

I wonder what that last pic on the bottom is supposed to show.

I had to do a forum search because you guys removed that article from techinfo. I guess you guys found out it was a fluke too but didnt bother to tell everyone else.

Reader beware, now I got to be more careful of any future "performance" articles I read here. Im reversing my settings tonight. This mod is
The TPS Mod has been used by a number of people on this forum. In addition the entire Techinfo section has been undergoing a TOTAL makeover during the last week. You can find it at: http://www.bonnevilleclub.com/forum/...e=article&k=80, right under the new Performance section.
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Old 02-08-2006, 07:05 PM   #7
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Quote:
Originally Posted by Boreas
Quote:
As an addition to this mod, we are also adjusting the idle set position a little further open. While the PCM will learn the idle voltage and this will NOT raise idle speed, it will give you more throttle response as you initially step on the gas. This part of the mod is optional but if you have a stock throttle body high consider giving this a try!
From:
http://www.geocities.com/carnutguy/c...hancement.html

I wonder what that last pic on the bottom is supposed to show.

I had to do a forum search because you guys removed that article from techinfo. I guess you guys found out it was a fluke too but didnt bother to tell everyone else.

Reader beware, now I got to be more careful of any future "performance" articles I read here. Im reversing my settings tonight. This mod is
this mod is NOT BS.....you used a random web page....please use Techinfo for accurate procedure
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Old 02-08-2006, 07:18 PM   #8
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Quote:
Originally Posted by 1993 SLE
Quote:
Originally Posted by Boreas
Quote:
As an addition to this mod, we are also adjusting the idle set position a little further open. While the PCM will learn the idle voltage and this will NOT raise idle speed, it will give you more throttle response as you initially step on the gas. This part of the mod is optional but if you have a stock throttle body high consider giving this a try!
From:
http://www.geocities.com/carnutguy/c...hancement.html

I wonder what that last pic on the bottom is supposed to show.

I had to do a forum search because you guys removed that article from techinfo. I guess you guys found out it was a fluke too but didnt bother to tell everyone else.

Reader beware, now I got to be more careful of any future "performance" articles I read here. Im reversing my settings tonight. This mod is
this mod is NOT BS.....you used a random web page....please use Techinfo for accurate procedure
Thats what I did:
http://www.bonnevilleclub.com/forum/...e=article&k=80,

That link leads to this:
http://www.bonnevilleclub.com/forum/...ic.php?t=22830

Which in turn pointed to this:
http://www.geocities.com/carnutguy/c...hancement.html

Which if you studied very carefully is the SAME EXACT link I posted before.

If anyone has the FSM for the 93, what is the default voltage values for the sensor? I would really appreciate this.
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Old 02-08-2006, 07:29 PM   #9
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ahh im sorry...but you should have NOT played with the idle stop screw...that is why you had problems with your idle
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