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Throttle Position sensor

 
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91camaro_rs
Member


Joined: 03 Dec 2008
Posts: 1712
Location: Fox Island, Wa

1991 Chevrolet Camaro RS
PostPosted: Fri Jan 21, 2011 2:20 pm    Post subject: Throttle Position sensor Reply with quote
im pretty sure mine is toast, its reading backward, when u give it gas the voltage and % goes down instead of up

i also broke a screw in the throttle body taking it off....sweet

so i need a TPS, and i dont really wanna buy a new one
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'91 Camaro RS 5.7 TPI- 700r4- 3.27 posi- headers- chambered exhaust-
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Darbbackwords
New Member


Joined: 12 Mar 2010
Posts: 19
Location: Seattle/Whidbey
PostPosted: Fri Jan 21, 2011 3:00 pm    Post subject: Reply with quote
Are you sure you are reading the correct pins? if you are measuring between the voltage source and signal instead of ground and signal you will get what you describe.
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MrMike98
Member


Joined: 18 May 2010
Posts: 231
Location: Bremerton
PostPosted: Fri Jan 21, 2011 3:52 pm    Post subject: Reply with quote
TPS is just a varible resistor, if it is varing it is working..
does the volts and % go down and then back up?
if ur reading this AT the tps ur just on the wrong wires. thers are 3 wires::grnd , +5volt, varible out.

sounds like tps is ok..
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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton

1987 Chevrolet Camaro IROC-Z
PostPosted: Fri Jan 21, 2011 4:58 pm    Post subject: Reply with quote
He's datalogging, guys. He's seeing what the ECM sees, which is a high resistance spot at the bottom end of the sensor.
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