5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

problem?

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Old Mar 9, 2005 | 04:20 PM
  #1  
Tims 88GT's Avatar
Tims 88GT
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Hey guys/girls, i have a 92 GT its an auto, here is the problem, when i start the car it starts and idles fine, but when i rev the car it will not go past 3thousand rpms?and the r's come down very slow, and it runs rough, i put new plugs,wires, iac, and i tried to set the tps, but i can only get a .55 on the tps so i drilled the wholes out and that is all i can still get, could it be my timing? or somthing with my maf? ALSO what do you guys set you voltage meter on when you set the tps?[:@]
Old Mar 9, 2005 | 05:10 PM
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anyone have any imput?
Old Mar 9, 2005 | 05:18 PM
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yeah mine does that too,,its an 88 5.0 i have also done plugs, wires, cap, and rotor, but it still does it,,, it is cold related too,,it it is 10 degrees out it will definetly not rev and sometimes will die, but if it is 70 degrees its perfectly fine
Old Mar 9, 2005 | 05:22 PM
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well im buying this car and i dont give a **** if it dose not run after i get it to my house, i have a brand new motor going in it, but i would like to get this one running right so i can sell it, i have no clue what it is, it is really making me mad, and i still dont know what my volt meter needs to be set on to set the tps[:@]
Old Mar 9, 2005 | 06:23 PM
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Default RE: problem?

i believe tps is .97 to .99.
Old Mar 9, 2005 | 06:35 PM
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yeah but how do you set it, i know the red lead to green wire and so on, but what is the volt meter supposed to be set on, and when you turn the key on do you mean turn it till you hear the fuel pump or not that far?[&:]
Old Mar 9, 2005 | 08:21 PM
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turn up the idle screw and then check the tps and see if it goes up at all
Old Mar 9, 2005 | 09:21 PM
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yeah i know but on the voltage meter what is the dile supposed to say DC What their is a few diff numbers, and do i tunr the key untill the fuel pump humms?
Old Mar 9, 2005 | 09:48 PM
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turn the key to the on position and check the volts and make it between .98 to .99
Old Mar 10, 2005 | 12:20 AM
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you don't use the red wire, put your voltmeter to DC volts
put your positive lead inthe green wire and your black one to a good ground
I just poked a hole in the wire.
check what it says, then loosen your TPS screws and turn it till the voltage is between 0.97 - 0.99 volts.
thats it.



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