| From | Message |
Tony
Dodge Dakota
JOIN HERE
4/11/2005
02:49:24
|
 Subject: Pre-magnum TPS sensor?
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Message:
Hello, its me again. While I wait for another transmission, I wanted to know if anyone would know anything about the correct voltage on the TPS sensor for a pre-magnum 3.9 (mine is an '89). I hear that the TPS sensor should read from .7v to .75v while the key is in the "on" position, but these people have the newer magnum engines.
I have already modified the sensor before I got the voltage readings from it. Stupid me! I removed the steel bushings on the sensor by heating them with a small butane torch and pushing them out. I took several readings with the sensor rotated at two positions. The two positions are: rotating the sensor counter-clockwise (torwards the "back"), and rotating the sensor clockwise (torwards the "front"). The voltages at closed throttle (CT) and wide-open throttle (OT) are shown below.
-----| Back | Front
-----|----------|-----------
CT | 0.72v | 1.06v
-----|----------|-----------
OT | 3.38v | 3.77v
I estimated that before I modified the sensor, the sensor read around .9v at closed throttle and 3.6v at WOT. Does this sound right at all? I dont know what the voltages supposed to read. The engine ran good, so the readings shouldn't be too wrong. Any help would be appreciated. Thanks.
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?
Dodge Dakota
JOIN HERE
4/11/2005
13:12:42
|  RE: Pre-magnum TPS sensor?
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Message:
They are in the ' ballpark '..
Probably best for you to try to
center it again .
You can try to set it towards the higher readings
to improve throttle response if needed !
( that first touch off idle ) after that it doesn't realy make any difference..
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Tony
Dodge Dakota
JOIN HERE
4/11/2005
13:26:08
|  RE: Pre-magnum TPS sensor?
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Message:
Thanks. I was just curious to see what things supposed to be like. I guess that pre-mags should have the same voltages as your magnum's TPS. I will experiment with different positions to see how it runs after we get the newer transmission in tonight. This wasn't important, I just wanted to hear from somebody to hear what they think. If anyone has anything to add, please do so...
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Bob Lincoln
Dodge Dakota
JOIN HERE
4/11/2005
13:34:04
| RE: Pre-magnum TPS sensor?
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Message:
Factory service manual says minimum of 0.2 volts at closed throttle. 0.7 volts is more typical of modified ones, not stock position.
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