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  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • 1994 - 1995 Specific Tech

Is the TPS adjustable in the 94?

  • Thread starter Thread starter NEEDA5.0
  • Start date Start date Aug 19, 2004
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NEEDA5.0

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#1
  • Aug 19, 2004
  • #1
I know you can adjust it on the fox, how about the SN95? What wire is hot?
 

Rootus

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#2
  • Aug 19, 2004
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No, not adjustable. And not meant to be adjusted, the EEC will baseline whatever the TPS is at when you turn the key.
 

mystang94gt

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Jun 14, 2004
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Aug 19, 2004
#3
  • Aug 19, 2004
  • #3
Yeah its nothing like the fox one unfortunately. I was hoping to use it to fix my idle but no luck.
 

95snoozer

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#4
  • Aug 19, 2004
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what are you talking about non adjustable

lyou can loosen the screws, drill out the holes and adjust the TPS, then tighten back down.

am I wrong hairy?
 

Rootus

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#5
  • Aug 19, 2004
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95snoozer said:
what are you talking about non adjustable

lyou can loosen the screws, drill out the holes and adjust the TPS, then tighten back down.

am I wrong hairy?
Click to expand...
You can drill the holes out and turn it, and get a different voltage -- but it won't have any effect. The EEC baselines at whatever the closed throttle voltage is, as long as it's not waaaay out of spec (if it is, you'll get a code).

For example, my Fox body throttle body has the TPS at 0.85v at closed throttle. At 0.89v, the EEC detects the status as part throttle. And at 3.75v or above the EEC switches to WOT.

The only thing to check the TPS for is that the voltage goes up smoothly and linearly as you increase the throttle position.

Dave
 
J

jetuomi

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Aug 19, 2004
#6
  • Aug 19, 2004
  • #6
I should have posted my results here earlier, but, using the TWEECER, I found that (in my case) I could increase TPS to 1.035 volts (and beyond) while maintaining a "CLOSED" throttle status.. There was no affect in driveability, and, in fact, I like the more aggressive "linear" curve associated with this. I adjusted the throttle position WOT function in Tweecer to keep WOT at the same "relative" voltage.. I have been driving this way with a TPS of 1.015 now for weeks and I actually like the results..

On the thread, we concluded in this thread that FOX body's are static between around .980 while SN95 5.0's have a wide range of .980 to 1.020 where you don't even need to worry about NOT being in Closed Throttle Position..

I hope this makes sense..
 

95snoozer

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#7
  • Aug 20, 2004
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HairyCanary said:
You can drill the holes out and turn it, and get a different voltage -- but it won't have any effect. The EEC baselines at whatever the closed throttle voltage is, as long as it's not waaaay out of spec (if it is, you'll get a code).

For example, my Fox body throttle body has the TPS at 0.85v at closed throttle. At 0.89v, the EEC detects the status as part throttle. And at 3.75v or above the EEC switches to WOT.

The only thing to check the TPS for is that the voltage goes up smoothly and linearly as you increase the throttle position.

Dave
Click to expand...

awesome,

I wondered why my car ran fine at 1.256 for 2 years
 

nmcgrawj

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Sep 28, 2003
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Aug 21, 2004
#8
  • Aug 21, 2004
  • #8
So when you do the fox body swap theres no need to worry about where the tps is at? Atleast not exactly where its at?
 

Rootus

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  • Aug 21, 2004
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nmcgrawj said:
So when you do the fox body swap theres no need to worry about where the tps is at? Atleast not exactly where its at?
Click to expand...
Not unless you switch to an A9L computer. The 94/95 computer doesn't really care what TPS or TB you have, all it sees is voltage.
 

Zero Signal

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Feb 24, 2003
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Aug 21, 2004
#10
  • Aug 21, 2004
  • #10
Yeah my voltage reads 1.5-2 volts (TB shut) on the volt meter, but logs correctly in the TwEECer.
 

nmcgrawj

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#11
  • Aug 21, 2004
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HairyCanary said:
Not unless you switch to an A9L computer. The 94/95 computer doesn't really care what TPS or TB you have, all it sees is voltage.
Click to expand...


So when you use a tweecer to use the A9L settings, is that considered using a A9L comp?
 

Rootus

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#12
  • Aug 21, 2004
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nmcgrawj said:
So when you use a tweecer to use the A9L settings, is that considered using a A9L comp?
Click to expand...
Nope. To get an A9L you'd have to swap the actual EEC itself. All the TwEECer can do is change the calibration on the EEC, it can't make it change identities.

Dave
 

nmcgrawj

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Aug 22, 2004
#13
  • Aug 22, 2004
  • #13
So when you use the tweecer for the A9L calibration, do u have to set the TPS like you would if you had a A9L comp. or would you not really care like if you still had your 94-95 calibration?

Sorry for the on-going questions...
 

Rootus

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#14
  • Aug 22, 2004
  • #14
nmcgrawj said:
So when you use the tweecer for the A9L calibration, do u have to set the TPS like you would if you had a A9L comp. or would you not really care like if you still had your 94-95 calibration?

Sorry for the on-going questions...
Click to expand...
You do not use an A9L calibration unless you have an A9L computer. If you have a 94/95, then your calibration is for the CBAZA strategy that the 94/95 computer uses. Very similar calibration settings, but not identical. The TPS baselining behavior is a fundamental property of the 94/95 computer, it's not part of the calibration.

It sounds like you're mixing up terminology a little . "Calibration" is just a bunch of settings -- timing, fuel, etc. Different models of EEC have similar settings, but not always identical.

Dave
 

Slow5.0

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#15
  • Aug 22, 2004
  • #15
ITS adjustable
On my I can go from 0.81 to 1.02 volts with looseing two screews , BUT if we re drilled those two holes on TPS (right and left) we could adjust even more
 

Rootus

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#16
  • Aug 22, 2004
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Slow5.0 said:
ITS adjustable
On my I can go from 0.81 to 1.02 volts with looseing two screews , BUT if we re drilled those two holes on TPS (right and left) we could adjust even more
Click to expand...
You didn't read the whole thread, did you?
 

Slow5.0

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#17
  • Aug 23, 2004
  • #17
Hehehe , for real I didn't read whole thread just two on top
 

Rootus

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#18
  • Aug 23, 2004
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Slow5.0 said:
Hehehe , for real I didn't read whole thread just two on top
Click to expand...
I figured as much

Dave
 

95snoozer

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#19
  • Aug 23, 2004
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LOL
 

nmcgrawj

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Aug 24, 2004
#20
  • Aug 24, 2004
  • #20
HairyCanary said:
You do not use an A9L calibration unless you have an A9L computer. If you have a 94/95, then your calibration is for the CBAZA strategy that the 94/95 computer uses. Very similar calibration settings, but not identical. The TPS baselining behavior is a fundamental property of the 94/95 computer, it's not part of the calibration.

It sounds like you're mixing up terminology a little . "Calibration" is just a bunch of settings -- timing, fuel, etc. Different models of EEC have similar settings, but not always identical.

Dave
Click to expand...


Thanks for your help so far Dave, I am just trying to grasp exactly what a tweecer does when you use the A9L calibration or for my future plans the 95 Cobra R (5.8L) to our 94/95 computer. So i see the TPS "characteristics" of our computer will be the same. Slowly but surely im getting this Tweecer stuff....
 
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