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GB2000
GenIII
3/07/2004
02:09:24
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 Subject: Bad TPS Sensor?
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Message:
I got to thinking about this and was wondering...could a bad TPS sensor be causing my transmission trouble? A lot of times when I floor it, my truck won't downshift and take off, but will bog down and slowly increase speed until it's ready to upshift. If I mash the pedal a little farther, it'll somtimes downshift and my rpm's will shoot up and it'll take off, but then it'll usually upshift too early which makes the downshifting quite pointless. My main transmission problems are when I'm driving and it's time to upshift, my engine will rev up (about 300 rpm's) before it actually goes into the next gear. It's all smooth though, but definite tranny slippage. It does it worst in cold and/or wet weather (when my engine is cold). What do ya'll think? Also how much do digital voltimeter things (I forgot the name...lol) cost and how would I measure the voltage of the tps sensor? I know the key should be in the on position without the engine running, but like...where do I put the lil probes on the sensor/sensor wires?
Josh
Red 98 RC V6 2wd Single in/dual out exhaust (soon to be switched to a flowmaster 40 single in/dual out), s-bolt "mod", Edelbrock 10" round air cleaner w/ K&N air filter, removed rubber flap...and more to come
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limp noodle
Dodge Dakota
JOIN HERE
3/07/2004
02:21:23
| RE: Bad TPS Sensor?
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Message:
you are gay, shut your mouth
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limp noodle
Dodge Dakota
JOIN HERE
3/07/2004
02:43:08
| RE: Bad TPS Sensor?
IP: Logged
Message:
duh i liek it up duh poop shoot
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daffydak
GenIII
3/07/2004
03:15:56
|  RE: Bad TPS Sensor?
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Message:
uuuh whatever limp....
seriously josh; it might be the tps or your tv cable. i adjusted my cable even though my tranny was fine and wow!! its a whole new tranny now!
check it out here
http://www.speedtweaks.ca/tipsandtricks.php
for now another idea is to start out in low and go to second and see if that helps and if your rear end is like mine (3:55) you can stay in second until a high 65 mph (redline) so if you need a kickdown bad (passing etc) you can go into 2 just to make it kick down then put it back into drive. that shouldn't hurt the tranny i don't think anyways but i could be wrong.
just my .02
Dan
mopar=mopower
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daffydak
GenIII
3/07/2004
03:26:39
| RE: Bad TPS Sensor?
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Message:
oh i almost forgot a quote from speedtweaks...
"Connect a Digital Volt Meter to the middle terminal on the TPS sensor (with the harness connected and the Key-ON/Engine-OFF). If it's close to .7v...leave it alone"
i assume that you connect the neg. cable from the volt meter to the engine or another suitable ground...
speedtweaks is a great site
keep truckin
Dan
mopar=mopower
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GB2000
GenIII
3/07/2004
04:38:06
| RE: Bad TPS Sensor?
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Message:
Thanks a lot Dan...and limp noodle, to each his own...weirdo.
Josh
Red 98 RC V6 2wd Single in/dual out exhaust (soon to be switched to a flowmaster 40 single in/dual out), s-bolt "mod", Edelbrock 10" round air cleaner w/ K&N air filter, removed rubber flap...and more to come
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J and J Auto
GenII
3/07/2004
13:39:24
| RE: Bad TPS Sensor?
IP: Logged
Message:
GB2000
center wire and any good ground
open and close the throtle key on motor off and
you should see from .3 to .7 on the sensor go
up to .35 or higher with nothing over 4.8 or it
will trip a code for TPS
On your 98 if you want better reaction time on the
trans out of lockup and O/D downshifts.
mod the sensor and take it up to .88 volts, over
.9 on the obd 2 will cayse high idle probs.
I found an old tech article from mopar on the
transmissions lockup, O/D and downshifting
reaction, for towing and heavy duty work.
They take the obd 1 systems 92 to 95 up to 1.2
1,3 volts 96 and up .88
Another thing you can do is adjust the TV linkage
on your 98 you need to remove the cover and move
an internal clip to change the lenghth
clip back longer, lower shift points and slower
reaction 1-2-3 all controlled by this cable
lockup and O/D are controled electricly TPS volts
and MAP sensor, load on motor than the comp tells
it to shift, and vehicle speed, speed sensor
move clip foward and cable shorter higher shift
points and faster downshift reaction times
A digital voltmeter is anywhere between $20 $30
Radio Shack has good prices on them and work just
as well.
Larry
J&J Auto
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