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-   -   Throttle posistioning sensor. (http://www.wranglerforum.com/f210/throttle-posistioning-sensor-167096.html)

BigGreenMachine 06-15-2012 03:39 PM

Throttle posistioning sensor.
 
Where is it located? I think that's why my jeep is chugging. The fault it's throwing is tps high voltage.

Mom sold the Jeepster 06-15-2012 03:59 PM

1 Attachment(s)
Firewall side of the throttle body. I got 2 from qtech that didn't work and a good part at the local parts store

BigGreenMachine 06-15-2012 04:28 PM

Thanks man.

BigGreenMachine 06-15-2012 04:41 PM

Is it adjustable or do I just have to replace it.

Mom sold the Jeepster 06-15-2012 05:12 PM

Your mailbox is full...you have to replace it there is no adjustment. You'll need a good #20 torx bit to get the two torx screws off. Make sure to depress the tab at the end of the wire harness connector after you slide the red tab back to get the connector off without breaking the lock tab that holds it on. It's best to do it with the hood all the way back to the windshield and when the engine isn't so hot.

staud11 06-15-2012 05:30 PM

My buddy just replaced his about 2 hours ago and said he can tell a big difference in power.

Mom sold the Jeepster 06-15-2012 05:34 PM

Changes ye ole MPGs a bit too

BigGreenMachine 06-16-2012 04:38 PM

I replaced it and Jeep was running a lot smoother, even noticed a power difference and chugging went away. I reset the check engine light (it was showing the fault tps high voltage). Well this morning the check engine light is on and it's back to chugging although not as often. I feel like I lost the power gain I had too. Any suggestions?

Mom sold the Jeepster 06-16-2012 08:55 PM

I had to replace the replacement 3 times, did the engine fault come back?

BigGreenMachine 06-16-2012 08:59 PM

Yes.

Mom sold the Jeepster 06-17-2012 10:15 AM

I'd take the part back and get a new one

BigGreenMachine 06-20-2012 07:07 PM

Still having same problem! :banghead:

Atthehop 06-20-2012 07:40 PM

Are you buying OEM?

BigGreenMachine 06-20-2012 08:05 PM

Yes! From autozone.

Atthehop 06-20-2012 08:12 PM

OEM means from the dealer. Aftermarket, autozone etc., are not very reliable.

jeepdude2003 06-20-2012 08:36 PM

I bought one from

jeepdude2003 06-20-2012 08:36 PM

I bought one from o'reillys and its been good to me for over a year and half so far

BigGreenMachine 06-20-2012 08:54 PM

It's still mopar.... Isn't that oem?

Mctim35 06-20-2012 09:01 PM

Just picked mine up from Napa. The guys at my Napa are great! After a bit of searching, we discovered my IAC

BigGreenMachine 06-20-2012 09:02 PM

And i meant advance auto parts not autozone. Not that it matters but I despise autozone.

Mctim35 06-20-2012 09:02 PM

is from a Cherokee.

BigGreenMachine 06-20-2012 09:02 PM

Quote:

Originally Posted by mctim35
just picked mine up from napa. The guys at my napa are great! After a bit of searching, we discovered my iac

iac?

BigGreenMachine 06-21-2012 03:26 PM

Anyone?

Mom sold the Jeepster 06-21-2012 04:23 PM

Idle air control, there are a lot of threads, but I've never done anything with it. Its right next to the TPS. Are you getting the same engine code ? Did any of the vacuum lines get knocked loose? What happens if you put the original back in?

BigGreenMachine 06-21-2012 08:44 PM

I am getting the same code, I'm pretty sure no vacuum lines are loose and idk about putting the old one in, I haven't tried it.

RUBI 4 MY MRS 06-21-2012 09:03 PM

Since its telling you high voltage, why don't you check the voltage? Here is from the FSM

THROTTLE POSITION SENSOR (TPS)—PCM
INPUT
The TPS is mounted on the throttle body (Fig. 7).
The TPS is a variable resistor that provides the Powertrain
Control Module (PCM) with an input signal
(voltage) that represents throttle blade position. The
sensor is connected to the throttle blade shaft. As the
position of the throttle blade changes, the resistance
of the TPS changes.
The PCM supplies approximately 5 volts to the
TPS. The TPS output voltage (input signal to the
PCM) represents the throttle blade position. The
PCM receives an input signal voltage from the TPS.
This will vary in an approximate range of from .26
volts at minimum throttle opening (idle), to 4.49 volts
at wide open throttle. Along with inputs from other
sensors, the PCM uses the TPS input to determine
current engine operating conditions. In response to
engine operating conditions, the PCM will adjust fuel
injector pulse width and ignition timing.

Also:

The TPS can be tested with a digital voltmeter.
The center terminal of the TPS is the output terminal.
With the ignition key in the ON position, check the
TPS output voltage at the center terminal wire of the
connector. Check this at idle (throttle plate closed)
and at Wide Open Throttle (WOT). At idle, TPS output
voltage should be greater than .26 volts but less
than .95 volts. At wide open throttle, TPS output
voltage must be less than 4.49 volts. The output voltage
should increase gradually as the throttle plate is
slowly opened from idle to WOT.

reissigree 06-22-2012 01:06 AM

MAKE SURE you put it on the right way. When I put mine on, I had it on backwards. It still ran, but it was still rough. Putting it on from the counter clockwise side (or visa-versa) Made all the difference.

BigGreenMachine 06-22-2012 05:47 AM

Quote:

Originally Posted by reissigree
MAKE SURE you put it on the right way. When I put mine on, I had it on backwards. It still ran, but it was still rough. Putting it on from the counter clockwise side (or visa-versa) Made all the difference.

There is only 2 ways to put it on isnt there?

BigGreenMachine 06-22-2012 05:55 AM

1 Attachment(s)
It looks right to me.

BigGreenMachine 06-22-2012 05:57 AM

Quote:

Originally Posted by RUBI 4 MY MRS
Since its telling you high voltage, why don't you check the voltage? Here is from the FSM

THROTTLE POSITION SENSOR (TPS)—PCM
INPUT
The TPS is mounted on the throttle body (Fig. 7).
The TPS is a variable resistor that provides the Powertrain
Control Module (PCM) with an input signal
(voltage) that represents throttle blade position. The
sensor is connected to the throttle blade shaft. As the
position of the throttle blade changes, the resistance
of the TPS changes.
The PCM supplies approximately 5 volts to the
TPS. The TPS output voltage (input signal to the
PCM) represents the throttle blade position. The
PCM receives an input signal voltage from the TPS.
This will vary in an approximate range of from .26
volts at minimum throttle opening (idle), to 4.49 volts
at wide open throttle. Along with inputs from other
sensors, the PCM uses the TPS input to determine
current engine operating conditions. In response to
engine operating conditions, the PCM will adjust fuel
injector pulse width and ignition timing.

Also:

The TPS can be tested with a digital voltmeter.
The center terminal of the TPS is the output terminal.
With the ignition key in the ON position, check the
TPS output voltage at the center terminal wire of the
connector. Check this at idle (throttle plate closed)
and at Wide Open Throttle (WOT). At idle, TPS output
voltage should be greater than .26 volts but less
than .95 volts. At wide open throttle, TPS output
voltage must be less than 4.49 volts. The output voltage
should increase gradually as the throttle plate is
slowly opened from idle to WOT.

Thanks for the write up. Am I checking the voltage on the connector while it's disconnected from the tps or the voltage on the tps while it's mounted into the throttle body? Also better safe then sorry, am I checking ac or dc? And doesn't it matter where I ground the negative terminal?


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