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TPS question

  • Thread starter Thread starter dastang2
  • Start date Start date Nov 13, 2004

dastang2

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Dec 11, 2003
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Nov 13, 2004
#1
  • Nov 13, 2004
  • #1
is it possible to have a bad tps and it not show a code for that particular problem. i heard that if you the car sounds like it is sucking a big gush of air(louder than normal whoosh), that the tps is reading wrong
well mine is doing that and i can't find any vacuum leaks and i know it is coming from the stock, untouched throttle body when the throttle is opened. it used to be quiet. it also has a hesitation and sometimes, it will try to flood out.
 
7

77sleeper

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#2
  • Nov 13, 2004
  • #2
yup, stick a meter on it and follow the V/slope
 

dastang2

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Dec 11, 2003
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Nov 13, 2004
#3
  • Nov 13, 2004
  • #3
i have another sensor that worked i just couldn't get it off of the other TB
how much is a new one,is there a v/slope selection on a voltometer. but why would it not show a tps code. would it also make an o2 code come up. i have a known working sensor in it and it says it does not
 
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77sleeper

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#4
  • Nov 13, 2004
  • #4
what I was saying is watch for dead spots while opening the throttle it should be smooth and linear
 

dastang2

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#5
  • Nov 13, 2004
  • #5
so what setting would i put the voltometer on to test this
 
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77sleeper

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#6
  • Nov 13, 2004
  • #6
VDC, between 1-5 volts

this is for a 5.0 but should give you a good idea what you are doing

How To Adjust TPS
"Muscle Mustangs & Fast Fords"
April 1993
The throttle position sensor is one of those things that falls into the category of "computer stuff" that makes a big difference and is easy to deal with, but average people like us would never know about. Without the proper adjustment, the throttle position sensor (TPS) will give the computer a false reading as to the exact throttle opening. A false reading will limit wide open throttle performance (something we definitely don't want). A voltage reading must be taken using a digital volt/ohmmeter (DVOM) with the Key On/Engine Off and with the Key On/Engine Running. A Radio Shack DVOM, part No. 22-185A, works well for this job.
The TPS is located directly on top of the throttle body and is adjusted by loosening the two phillips mounting screws and swiveling the sensor until the highest reading is found. It may be necessary to elongate the holes with a small file to achieve the desired reading.

The spec range for Key On is from .88 to 1.0 volt; shoot for the .97 to .99 volt. With the engine running, the voltage should be no higher than 1.05 volts.

Incorrect Throttle Position Sensor (TPS) voltage will result in reduced performance. The best way to take a TPS voltage reading is by using two safety pins through the wires coming from the sensor. The positive lead is attached to the green wire, while the negative goes to the black wire. Always ground the meter through the sensor's black wire. This gives a direct, and more accurate ground into the computer
 

dastang2

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Dec 11, 2003
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Nov 13, 2004
#7
  • Nov 13, 2004
  • #7
ok i will try this tomorrow, i hope it is messed up so i can fix it and see if it runs better.
 

dastang2

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Dec 11, 2003
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Nov 14, 2004
#8
  • Nov 14, 2004
  • #8
ok i was going to do it and there are 3 wires, which ones do i use. one is brown and i forgot the rest but they have stripes and there was a green striped one. anyway anybody know which wires to test
 

mustang50v8

Member
Feb 4, 2003
548
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847 Chicago Burbs
Nov 14, 2004
#9
  • Nov 14, 2004
  • #9
its really easy to replace the TPS. it is only a 15-20 dollar part i think (but i could be wrong) but all you have to do is take of the coil pack (circled in the image) the TPS is right below the coil pack. remove the TPS with a couple bolts and put the new one on. i did in about 20 minutes myself. it just is not worth going through all that trouble testing it and crap
 

dastang2

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Dec 11, 2003
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Nov 14, 2004
#10
  • Nov 14, 2004
  • #10
that is the cam position sensor, the tps is on the throttle body and the screws that hold it on are hard to get off.
 

mustang50v8

Member
Feb 4, 2003
548
3
18
847 Chicago Burbs
Nov 14, 2004
#11
  • Nov 14, 2004
  • #11
dastang2 said:
that is the cam position sensor, the tps is on the throttle body and the screws that hold it on are hard to get off.
Click to expand...

wow your right. what the hell was i thinking. maybe i should get some sleep. i have had alot to drink this weekend and not a whole lot of sleeping. sorry for going on about the CPS
 

dastang2

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Dec 11, 2003
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Nov 14, 2004
#12
  • Nov 14, 2004
  • #12
that's ok, i do it too sometimes
 
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