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Old 07-01-2005, 16:02   #1 (permalink)
Rod Williams
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'87

Today my '87 Mustang when I shifted gears, with the clutch in, the RPM
actually went up before hitting the next gear. I stopped at a
stop sign and at a dead stop the RPM went up to 2200 and wouldn't come
down. Stopped at another stop sign, and the same thing. Shut it off,
restarted and it was fine. Any ideas? Did the computer just get dumb or
is this the first sign of a problem?

Thanks
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Old 07-01-2005, 16:02   #2 (permalink)
NoOption5L@aol.com
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Re: '87

Rod Williams wrote:
> Today my '87 Mustang when I shifted gears, with the clutch in, the RPM
> actually went up before hitting the next gear. I stopped at a
> stop sign and at a dead stop the RPM went up to 2200 and wouldn't come
> down. Stopped at another stop sign, and the same thing. Shut it off,
> restarted and it was fine. Any ideas? Did the computer just get dumb or
> is this the first sign of a problem?


Rod,

Sounds to me like you need a new TPS sensor. It's mounted on the top
of the throttle body with two small screws. It's really easy to remove
and replace, although you'll need a multimeter to adjust the new one.
If you want to do it yourself, just ask we'll post instructions.

Patrick
'93 Cobra
'03 Focus ZX3

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Old 07-01-2005, 18:02   #3 (permalink)
Rod Williams
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Posts: n/a
Re: '87

NoOption5L@aol.com wrote:
> Rod Williams wrote:
>
>>Today my '87 Mustang when I shifted gears, with the clutch in, the RPM
>>actually went up before hitting the next gear. I stopped at a
>>stop sign and at a dead stop the RPM went up to 2200 and wouldn't come
>>down. Stopped at another stop sign, and the same thing. Shut it off,
>>restarted and it was fine. Any ideas? Did the computer just get dumb or
>>is this the first sign of a problem?

>
>
> Rod,
>
> Sounds to me like you need a new TPS sensor. It's mounted on the top
> of the throttle body with two small screws. It's really easy to remove
> and replace, although you'll need a multimeter to adjust the new one.
> If you want to do it yourself, just ask we'll post instructions.
>
> Patrick
> '93 Cobra
> '03 Focus ZX3
>

I would appreciate the instructions. I have a meter so that is not a
problem.

Thanks
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Old 07-02-2005, 01:01   #4 (permalink)
NoOption5L@aol.com
Guest
 
Posts: n/a
Re: '87

Rod Williams wrote:

> >>Today my '87 Mustang when I shifted gears, with the clutch in, the RPM
> >>actually went up before hitting the next gear. I stopped at a
> >>stop sign and at a dead stop the RPM went up to 2200 and wouldn't come
> >>down. Stopped at another stop sign, and the same thing. Shut it off,
> >>restarted and it was fine. Any ideas? Did the computer just get dumb or
> >>is this the first sign of a problem?


> > Rod,


> > Sounds to me like you need a new TPS sensor. It's mounted on the top
> > of the throttle body with two small screws. It's really easy to remove
> > and replace, although you'll need a multimeter to adjust the new one.
> > If you want to do it yourself, just ask we'll post instructions.


> I would appreciate the instructions. I have a meter so that is not a
> problem.


> Thanks


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 (though I've
never had to elongate the holes).

The spec range for Key On/engine not running 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.

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.

Hope this helps.

Patrick
'93 Cobra

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Old 07-02-2005, 01:01   #5 (permalink)
slimestickland34@hotmail.com
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Posts: n/a
Re: '87

On 1 Jul 2005 18:55:32 -0700, NoOption5L@aol.com wrote:

>
>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.
>
>Hope this helps.
>
>Patrick
>'93 Cobra

lmfao
what about the holes ya left in the wire
HACK

h
u
r
c
a
s
t

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Old 07-02-2005, 01:01   #6 (permalink)
Rod Williams
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Posts: n/a
Re: '87


>
>
> 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 (though I've
> never had to elongate the holes).
>
> The spec range for Key On/engine not running 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.
>
> 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.
>
> Hope this helps.
>
> Patrick
> '93 Cobra
>


Thanks. I'll try it.
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Old 07-02-2005, 14:02   #7 (permalink)
NoOption5L@aol.com
Guest
 
Posts: n/a
Re: '87

slimestickland34@hotmail.com wrote:
> On 1 Jul 2005 18:55:32 -0700, NoOption5L@aol.com wrote:


> >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.


> >Hope this helps.


> what about the holes ya left in the wire


duh dont no... may be some ting like dis wil werk duh what u tink
herc?

http://www2.shopping.com/xGS-liquid_...kin_id-3068594

patrick
1993 cobra
2003 focus zx3

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Old 07-02-2005, 16:01   #8 (permalink)
Rod Williams
Guest
 
Posts: n/a
Re: '87


>
>
> 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 (though I've
> never had to elongate the holes).
>
> The spec range for Key On/engine not running 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.
>
> 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.
>
> Hope this helps.
>
> Patrick
> '93 Cobra
>


I got the voltage to .98 volts. It seemed to be seeking idle speed with
slight up and down fluctuations at idle. I drove it and checked it
again, engine off but was hot and the voltage was over 1 volt. Reset it
to .95 volts after engine cooled about two hours. After restart idle was
steady and after it got hot the voltage read .97 volts. It there a
problem with the sensor since heat seems to change the voltage? I'll
have to see what happens when it completely cools.
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Old 07-02-2005, 20:02   #9 (permalink)
NoOption5L@aol.com
Guest
 
Posts: n/a
Re: '87

Rod Williams wrote:

> > 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 (though I've
> > never had to elongate the holes).


> > The spec range for Key On/engine not running 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.


> > 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.


> > Hope this helps.


> I got the voltage to .98 volts. It seemed to be seeking idle speed with
> slight up and down fluctuations at idle. I drove it and checked it
> again, engine off but was hot and the voltage was over 1 volt. Reset it
> to .95 volts after engine cooled about two hours. After restart idle was
> steady and after it got hot the voltage read .97 volts. It there a
> problem with the sensor since heat seems to change the voltage? I'll
> have to see what happens when it completely cools.


This is after you replaced the TPS?

Patrick
'93 Cobra
'03 Focus ZX3

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Old 07-03-2005, 07:02   #10 (permalink)
Rod Williams
Guest
 
Posts: n/a
Re: '87

NoOption5L@aol.com wrote:
> Rod Williams wrote:
>
>
>>>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 (though I've
>>>never had to elongate the holes).

>
>
>>>The spec range for Key On/engine not running 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.

>
>
>>>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.

>
>
>>>Hope this helps.

>
>
>>I got the voltage to .98 volts. It seemed to be seeking idle speed with
>>slight up and down fluctuations at idle. I drove it and checked it
>>again, engine off but was hot and the voltage was over 1 volt. Reset it
>>to .95 volts after engine cooled about two hours. After restart idle was
>>steady and after it got hot the voltage read .97 volts. It there a
>>problem with the sensor since heat seems to change the voltage? I'll
>>have to see what happens when it completely cools.

>
>
> This is after you replaced the TPS?
>
> Patrick
> '93 Cobra
> '03 Focus ZX3
>

Sorry. No I did not replace it because when I first checked it the
voltage was .91 volts so I thought that all that might be needed was to
set the voltage.
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