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Car Forum / Ford / Ford Mustang / July 2005'87
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 > 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 >>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 [quoted text clipped - 13 lines] > '93 Cobra > '03 Focus ZX3 I would appreciate the instructions. I have a meter so that is not a problem. Thanks > >>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 >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 [quoted text clipped - 6 lines] >Patrick >'93 Cobra lmfao what about the holes ya left in the wire HACK h u r c a s t > >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_electrical_tape~NS-1~linkin_id-3068594 patrick 1993 cobra 2003 focus zx3 >> >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 [quoted text clipped - 14 lines] >1993 cobra >2003 focus zx3 fock they boot ya out of the dealership for hack work like you suggest proper tool Insulated Piercing Hook/Alg Clip $14.25 Spring loaded XJL Macro-Hook centers wire and pierces insulation in one easy motion Accepts wire up to .125" in diameter Insulated alligator clip ends Sold as pair (1 Black, 1 Red)Manufacturer... more... http://www.drivewerks.com/catalog/ShopCart/TOOL/POR_TOOL_CAT436-detail.htm case closed h u r c a s t > 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 [quoted text clipped - 16 lines] > Patrick > '93 Cobra Thanks. I'll try it. > 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 [quoted text clipped - 16 lines] > 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. > > 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 [quoted text clipped - 3 lines] > 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 >>>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 [quoted text clipped - 27 lines] > '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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