trouble setting TPS

beaver2489

Founding Member

Feb 26, 2002

503

2

0

st. joseph missouri

Jul 28, 2004

#1

• Jul 28, 2004

• #1

I cant get my TPS voltage to go under 2.80v with this Power Products throttle body. I use a voltmeter, red lead on orange wire, black lead on green wire, turn key on and check voltage. The lowest I can set it is 2.80v wtf? I just bought a new TPS in case the other was bad...same problem. Anyone else have this problem with an aftermarket throttlebody. This one I have has 2 allen head screws you loosen to adjust the TPS voltage, not like the stock throttlebody.

 

ironmedic

New Member

Mar 18, 2003

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Puyallup, WA

Jul 28, 2004

#2

• Jul 28, 2004

• #2

u need to adjust the throttle stop. it sounds like it is too far. what you do is back the stop out till it does not contact the TB. the voltage should go down. then adjust the throttle stop until u start seeing the voltage come around .96-.99 and there you go. if u get into the .90's range, adjust the TPS sensor itself to get it more accurate.

 

R

Rerun

Founding Member

Mar 31, 2002

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16

South Bay, California

Jul 28, 2004

#3

• Jul 28, 2004

• #3

You're probably going to have to take a drill and make the holes on the TPS a bit bigger, so that you can move it around and **** with the voltage.

 

beaver2489

Founding Member

Feb 26, 2002

503

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st. joseph missouri

Jul 28, 2004

#4

• Jul 28, 2004

• #4

adjust the throttle stop? how do I do this? thanks

 

ironmedic

New Member

Mar 18, 2003

1,361

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Puyallup, WA

Jul 28, 2004

#5

• Jul 28, 2004

• #5

if you look under your T/B, you will see a screw for an allen wrench. or just move your throttle plate under your T/B and see the little screw thing that it contacts. if you have your instructions, it is supposed to tell you to adjust that screw before you do anything.

 

jrichker

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Mar 10, 2000

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Dublin GA

Jul 28, 2004

#6

• Jul 28, 2004

• #6

You are using the wrong wires. The Orange/White wire is the VREF signal, 5 volts from the computer. You use the Dark Green/Lt green wire (TPS signal) and the Black/White wire (TPS ground)

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host)

http://www.veryuseful.com/mustang/tech/engine/images/88-91eecPinout.gif

 

ironmedic

New Member

Mar 18, 2003

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Puyallup, WA

Jul 28, 2004

#7

• Jul 28, 2004

• #7

AH! good catch jrichker! i didnt realize he had the wrong wires. hopefully that helps him too! LOL!

when i put my BBK 70mm on, i had to adjust the throttle stop and it made my TPS adjust correctly too

 

5

5.0guy

Member

Apr 17, 2004

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MI

Jul 28, 2004

#8

• Jul 28, 2004

• #8

do you even have to use the tps ground? can't you just hold the black probe on the intake?

 

axeman

Founding Member

Feb 9, 2001

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Elizabethtown, PA

Jul 28, 2004

#9

• Jul 28, 2004

• #9

5.0guy said:

do you even have to use the tps ground? can't you just hold the black probe on the intake?

Click to expand...

you got it. anywhere that's a good ground.

 

mr5o

Founding Member

Jan 28, 2001

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Ontario, Canada

Jul 28, 2004

#10

• Jul 28, 2004

• #10

what would be affected if the tps was not set correctly ?? my car runs real bad at wide open ...i was thinking it might be the tps sensor

 

5

5.0guy

Member

Apr 17, 2004

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MI

Jul 28, 2004

#11

• Jul 28, 2004

• #11

I just set mine sunday, it's a pain gettin it right on .98, I had it a .97 and tried holding it there, but when I tightened the screws, it must've moved. I tried again, and right now it's set at .92. I'm gonna take some more time to do it again and have a friend help so I don't have to hold the black probe with my mouth..

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Jul 28, 2004

#12

• Jul 28, 2004

• #12

Measure the voltage between the black wire and the green wire - don't use another ground. The ecu checks the tps voltage each time you start the car and uses that as it's idle reference. As long as it's between .80V and about 1.3V at idle with the throttle closed, things should work fine. If you're have to set it somewhere - put it around .90-.95V.

To set the throttle stop correctly, back the stop screw out so the plate closes all the way. Insert a .003 feeler blade between screw and stop - tighten til the screw just touches the feeler; remove the feeler and turn the screw another 1/4 turn. As a practical matter, I just turn it 1/4 turn more once it touches the stop. Set that BEFORE you set your tps.

 

Michael Yount

Mustang Master

Apr 10, 2002

9,039

6

79

Charlotte, NC

Jul 28, 2004

#13

• Jul 28, 2004

• #13

Measure the voltage between the black wire and the green wire - don't use another ground. The ecu checks the tps voltage each time you start the car and uses that as it's idle reference. As long as it's between .80V and about 1.3V at idle with the throttle closed, things should work fine. If you have to set it somewhere - put it around .90-.95V.

To set the throttle stop correctly, back the stop screw out so the plate closes all the way. Insert a .003 feeler blade between screw and stop - tighten til the screw just touches the feeler; remove the feeler and turn the screw another 1/4 turn. As a practical matter, I just turn it 1/4 turn more once it touches the stop. Set that BEFORE you set your tps.

Once the throttle stop is set, and the tps is set, with the ignition on, engine off, leave your volt meter hooked up and slowly open the throttle. The voltage should smoothly climb from .95V up into the 4 to 5V range as you open the throttle more.

 

axeman

Founding Member

Feb 9, 2001

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36

Elizabethtown, PA

Jul 28, 2004

#14

• Jul 28, 2004

• #14

i just put my alligator clip on one of the throttle body bolts and probe the green(i think) wire and never had a problem. to be on the safe side i would set it ~.95v and let it go.