Throttle Posistion sensor adjustment - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-13-2004, 03:18 AM   #11
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Quote:
Originally Posted by Allmachtige
Interesting find PontiacDad, not sure what way hes rotating the sensor in the directions though. And why are 2 M4 washer needed?
I used star washers, #8 they worked. The washer as I see it keeps the sensor trapped and held tight, without it the sensor may shift if the screw head ***** to one side of the hole.
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Old 08-13-2004, 09:01 AM   #12
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once I get my throttle body off [stupid pos, if you can help, go here]

The instructions are more biased towards the series II, which means it of course vairies for me.. and I have yet to find an idle screw... Anybody have some documentation and pictures for a series I?


-justin
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Old 08-13-2004, 01:39 PM   #13
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checked my TPS sensor just now..
.37 Volts at idle
4.1 Volts at WOT

would it even be worth it to change mine or not? I hope it'* just fine because I have no idea how to adjust it.
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Old 08-13-2004, 01:43 PM   #14
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Quote:
Originally Posted by Custom88
checked my TPS sensor just now..
.37 Volts at idle
4.1 Volts at WOT

would it even be worth it to change mine or not? I hope it'* just fine because I have no idea how to adjust it.
That is a bit low and if you wanted a quicker throttle responce you should do it. Also if you were to run nos the 4.1 would be to low to activate it (not that much of us run that setup?).
Its not that hard to do just follow the link at the top of this post, the instructions are pretty clear and only takes about 20 mins.
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Old 08-13-2004, 03:45 PM   #15
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i am gonna check this on our two bonnies and see what they are reading, since the 2000 has alot better throttle response.

EDIT: I think I have the worst so far on my 97:
idle: 1.1
WOT: 3.25

hmmm...maybe I should try this. what do you guys think?
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Old 08-13-2004, 09:29 PM   #16
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Hmmm....interesting.
So O'Neil, it really was noticeable
I expect that it might affect fuel economy.....ya, like we care.
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Old 08-13-2004, 09:38 PM   #17
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Quote:
Originally Posted by 2000SilverBullet
Hmmm....interesting.
So O'Neil, it really was noticeable
I expect that it might affect fuel economy.....ya, like we care.
One of those 'well I did something' so its notice able, that and the boost solenoid adjustment and I can feel it. Fuel? well if I kept my foot out of it I might be able to tell but nothing so far
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Old 08-14-2004, 12:21 AM   #18
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I'm doing both tomorrow. Picked up some screws and washers already. Changing my MAF screws to hex at the same time.
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Old 08-14-2004, 01:38 PM   #19
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This modification is giong to affect Fuel economy. Basically the only thing this is diong is advising the PCM that the throttle is being demanded more than it actually is. Thus, it will add more fuel but you'll have less air for that fuel. So bascially the air/fuel mixture is going to be higher (more fuel to less air. Seems to me eventually the PCM is giong to learn this and adjust itself to run more lean dumping less fuel and ultimately the same throttle response we all had before this modification.
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Old 08-14-2004, 03:40 PM   #20
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Quote:
What this mod will do: Imagine if you will a range between the two values, idle and WOT, with part throttle inbetween. This is the operating range of the sensor. Along this range, you have points at which certain upshifts occur, or downshifts, or power enrichment fueling, and finally a voltage that you hope the PCM recognizes as WOT.

What we are essentially doing with this modification is moving this sensor'* operating range up and down by adjusting it but remember that the points stay the same, only the range moves. By doing this, we can control how soon these points are reached.
It just gets you into the power QUICKER. It doesn't actually give more. Just sooner. Improved throttle response with respect to time.
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