Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum > Throttle posistioning sensor.

Join Wrangler Forum Today


Thread: Throttle posistioning sensor. Reply to Thread
Title:
  
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
12-29-2012 10:06 PM
JTTJ19
Quote:
Originally Posted by Atthehop

Does it say Mopar on the box. I think Mopar makes parts for Chrysler.
Mopar is parts for Chrysler and Chrysler makes jeep and dodge
12-29-2012 07:25 PM
sierchio BIG GREEN... I tried sending you PM but your inbox is full... so..

Did you ever get your TPS situation straightened out? I'm having same problem... replaced sensor 3 times... replaced IAC today... still throwing a code for TPS and bogging out in 2nd and 3rd gear...
07-16-2012 12:21 PM
jdsguitar201
Quote:
Originally Posted by BigGreenMachine View Post
Did you leave it in the jeep?
I had taken mine out because i couldn't get my TPS off otherwise, but you don't have to. It makes it a ton easier though. If you don't, don't be supprised if you get some smokey exhaust for a minute or two as the cleaner burns off, but it's no problem though. But taking the throttle body off is easy as cake. Just make sure you get a new gasket, but do not put any sealant on the gasket. You don't want to risk that ending up inside the engine. That makes it even easier.
07-15-2012 10:35 PM
Fitzey5435
Was it the CPS and PLUGS???

Quote:
Originally Posted by BigGreenMachine View Post
I just removed the cps and cleaned it (it was gross) is there a way I can clean the part of the bell housing where the cps sits in it? I have a feeling that s dirty too. In the picture below I got 1.53 vdc from the middle wire and 1.03 vdc from the right wire. I used the left wire as the ground and had the jeep off and plug undone durning these measurements. I am about to re gap the spark plugs, .035 for a 99 4.0 correct?
Well So was it the CPS and some poorly gapped plugs???
07-15-2012 07:48 AM
Jim Spahr I know Big Green has a 4.0L , so this is for those like jdsguitar who has a TPS problem in a '98 2.5L four. I changed the TPS and replaced it with a AZ or Advance Auto Parts TPS about a year ago. I couldn't remove the TPS since it is jammed against the firewall. So I had to remove the TB from the engine to get to the two bolts on the TPS. Then you can replace the TPS --noting the way the old one is positioned on the TB. Then clean and reinstall the TB on the engine. Be sure to use a throttle Body cleaning product, not an old fashioned harsh carb cleaner. Now it is good if you had disconnected the battery like the manual always says to do and you never do. Like it was said above, the ECM has to relearn the new TPS, so reconnect the battery terminal and drive it awhile while the ECM sorts the new part out. IOW it will sputter and chug a little bit at first until it accomodates the new TPS. Then the engine will smooth out and run like new. I am saying to not be alarmed if you first get a rough running engine. It should smooth out very quickly. This relearning process should be the same for both 4.0L and 2.5L engines.
07-14-2012 08:23 AM
BigGreenMachine Did you leave it in the jeep?
07-14-2012 01:02 AM
jdsguitar201
Quote:
Originally Posted by BigGreenMachine View Post
When you say you gave the throttle body a good scrubbing can you please go into detail? What exactly did you do?
Just take a tooth brush, or some paper towels, anything that wont scratch it up. Spray some throttle body cleaner in it, and scrub. Make sure you get throttle body cleaner and NOT carb cleaner. Open up the throttle and make sure to get all of the surfaces clean. I try to stay clear of the sensors, but you shouldn't worry about anything. It helps a lot if it hasn't been done before. Im pushing about 113000 and it didn't look like it had ever been cleaned.
07-13-2012 12:01 PM
BigGreenMachine
Quote:
Originally Posted by jdsguitar201
I've been getting the check engine light for a while now for the TPS sensor. In addition to the light, I've been getting this raspy sputtering noise that gets worse under load. It was horrible. Yesterday I finally got a new TPS in there, I just bought whatever one O'Rieleys had, it cost like $30. I also gave the throttle body a good scrubbing while i was in there. It drives like a new jeep. It's great. The noise is gone, it's a smoother ride, and a little bit more power out of the 2.5l. I had a particularly fun time getting the old TPS off though. I couldn't get the torx screws holding the sensor on to budge at all. Pb blaster wasn't doing anything either. I ended up taking the whole throttle body off, putting it in a table clamp, and simultaniously using a torx bit and a vice grip to get each screw out. Took about two hours. Everthing else went smoothly. Well worth the work [:
When you say you gave the throttle body a good scrubbing can you please go into detail? What exactly did you do?
07-13-2012 11:58 AM
BigGreenMachine
Quote:
Originally Posted by JPi1
The tps wires go to the ECM, the ECM sends out a very low voltage signal to the tps, as you open or close the throttle, the tps sends a voltage back from 1-5 volts, telling the ECM how much fuel the injectors need to spray. If a scan tool detects the tps bad, you simply replace it.
I replaced it 4 times.
07-13-2012 10:36 AM
jdsguitar201 I've been getting the check engine light for a while now for the TPS sensor. In addition to the light, I've been getting this raspy sputtering noise that gets worse under load. It was horrible. Yesterday I finally got a new TPS in there, I just bought whatever one O'Rieleys had, it cost like $30. I also gave the throttle body a good scrubbing while i was in there. It drives like a new jeep. It's great. The noise is gone, it's a smoother ride, and a little bit more power out of the 2.5l. I had a particularly fun time getting the old TPS off though. I couldn't get the torx screws holding the sensor on to budge at all. Pb blaster wasn't doing anything either. I ended up taking the whole throttle body off, putting it in a table clamp, and simultaniously using a torx bit and a vice grip to get each screw out. Took about two hours. Everthing else went smoothly. Well worth the work [:
07-13-2012 10:05 AM
Jodfie
Quote:
Originally Posted by Mctim35 View Post
It's sticking mechanically. It finally got stuck as I was pulling into the lot at work one morning. When I pulled the intake hose off the top of the TB, I could see the butterfly was open just enough to force the engine to idle at 1500 RPM+. I pulled the TB off when I got home and I can hear a little crunching in the bearings. A little silicone spray on the outside has kept it at bay for the time being but it looks like it's not fixable. So I'm looking into the BBK 62mm as a replacement. I doubt I'll see any power gains but it's cheaper than OEM.
when i took my TB off the first time to clean it...i zip tied it open...when i cut the zip tie it dropped down like a quarter of a inch...and wouldnt go farther...finally with finagling...it dropped and then i opened it all the way up with no issue...but i wanna make sure it didnt mess anything up...
07-13-2012 09:21 AM
Mctim35
Quote:
Originally Posted by Jodfie View Post
was it sticking mechanically or electrically?
how can you figure that out...and how can you fix? i believe mine is sticking as well
It's sticking mechanically. It finally got stuck as I was pulling into the lot at work one morning. When I pulled the intake hose off the top of the TB, I could see the butterfly was open just enough to force the engine to idle at 1500 RPM+. I pulled the TB off when I got home and I can hear a little crunching in the bearings. A little silicone spray on the outside has kept it at bay for the time being but it looks like it's not fixable. So I'm looking into the BBK 62mm as a replacement. I doubt I'll see any power gains but it's cheaper than OEM.
07-13-2012 08:13 AM
JPi1 The tps wires go to the ECM, the ECM sends out a very low voltage signal to the tps, as you open or close the throttle, the tps sends a voltage back from 1-5 volts, telling the ECM how much fuel the injectors need to spray. If a scan tool detects the tps bad, you simply replace it.
07-12-2012 11:11 PM
BigGreenMachine Hello?
07-12-2012 01:31 PM
BigGreenMachine Anything?
07-08-2012 01:29 PM
BigGreenMachine Is there a relay or fuse that is directly related/connected to the tps or the could have anything to do with the wires that the tps get power and information from?
07-08-2012 01:28 PM
BigGreenMachine
Quote:
Originally Posted by Mom sold the Jeepster
The electrode on the top plug in the picture with 3 plugs looks like its off center. Can you straighten it out or replace them ?
What do you mean off center? I think it's just the way it was lay compared to the other two, or just the picture. That picture is before I re gapped them.
07-07-2012 06:24 PM
Mom sold the Jeepster The electrode on the top plug in the picture with 3 plugs looks like its off center. Can you straighten it out or replace them ?
07-07-2012 01:20 PM
BigGreenMachine
Quote:
Originally Posted by BigGreenMachine
I just removed the cps and cleaned it (it was gross) is there a way I can clean the part of the bell housing where the cps sits in it? I have a feeling that s dirty too. In the picture below I got 1.53 vdc from the middle wire and 1.03 vdc from the right wire. I used the left wire as the ground and had the jeep off and plug undone durning these measurements. I am about to re gap the spark plugs, .035 for a 99 4.0 correct?
Here is the picture that didn't attach TW first time.
07-07-2012 01:18 PM
BigGreenMachine Jeep is running a lot better after all that. Thanks for the advice guys. I'm not 100% sure the problem is fixed. I think I had one or two "chugs." not sure if it was me driving or just still the same symptoms. Also I can't get the check engine light to go away which leads me to believe I haven't fixed the problem. I should be able to hold the positive cable to the negative terminal for 30 secs, reconnect the positive cable. turn key on turn headlights on then turn headlights off turn key off right? It is about 1,247,064 degrees outside so I am gonna take a break and get in the pool. Next step is to put original tps back in. I will keep you guys updated. Thanks for all the help and please keep it coming. (sorry about the 847,946 posts in a row)
07-07-2012 12:39 PM
BigGreenMachine Do my plugs look okay? They are autolite brand.
07-07-2012 12:15 PM
BigGreenMachine I just removed the cps and cleaned it (it was gross) is there a way I can clean the part of the bell housing where the cps sits in it? I have a feeling that s dirty too. In the picture below I got 1.53 vdc from the middle wire and 1.03 vdc from the right wire. I used the left wire as the ground and had the jeep off and plug undone durning these measurements. I am about to re gap the spark plugs, .035 for a 99 4.0 correct?
07-07-2012 11:33 AM
BigGreenMachine Replaced it for a fourth time. Still same problem. The dealer gave me a tps that had some of the teeth that holds the ring on missing. They tried to tell me it comes like that. I compared it to the one I was taking back (under warranty) and tried to tell them they were wrong. I'll take a picture of it when I pull it out and replace it again. It was the only one they had left and it also is under warranty. I dont think the teeth missing had anything to do with its performance but it's just ridiculous that band new out of the box mopar is already broken. Next thing in gonna is check the voltage coming out of the plug.
07-07-2012 10:27 AM
Jodfie
Quote:
Originally Posted by Mctim35 View Post
The NAPA sensors aren't Mopar but I haven't had an issue with any of the other sensors I've picked up from them. I noticed a difference after I replaced my TPS but the IAC and MAP were also part of the fix. I wasn't throwing any codes though before hand though. I was getting a surge which turned out to be the butterfly sticking. Did you disconnect the battery for at least 5 min. after replacing the sensor?
was it sticking mechanically or electrically?
how can you figure that out...and how can you fix? i believe mine is sticking as well
07-06-2012 04:25 PM
BigGreenMachine Ok so in unplugged the air bag plug and still having the same symptoms.
07-06-2012 04:02 PM
BigGreenMachine
Quote:
Originally Posted by smccollamjr
Remove the plastic around the steering column. On the bottom of the column just behind the steering wheel you'll see two plugs. One is for the airbag the other is for the horn and cruise control if you have it. Be careful and don't break the plastic clips on the plugs when you disconnect them,
There are like 1,639,839 plugs. Which two are you talking about?
07-05-2012 11:13 PM
JPi1
Quote:
Originally Posted by BigGreenMachine
So I am going to try replacing the tps for the fourth time (2nd mopar replacement) hopefully this works because if it doesn't I'm bout to just take it to the dealer. I'm tired messing with it
A good scan tool like OTC or snap on will show if the tps is working right. Put the tps in the graph mode, then slowly press the throttle to the floor. The line on the graph should go up with a nice, steady line. Any consistent glitch would indicate a bad spot in the tps.
07-05-2012 10:58 PM
smccollamjr Remove the plastic around the steering column. On the bottom of the column just behind the steering wheel you'll see two plugs. One is for the airbag the other is for the horn and cruise control if you have it. Be careful and don't break the plastic clips on the plugs when you disconnect them,
07-05-2012 10:24 PM
BigGreenMachine So what exactly do i unplug under the dash to check this clock spring? I just dont see how a clock spring could cause the symptoms that my jeep is having. It is chugging and feels like its not getting fuel sometimes.
07-05-2012 04:34 PM
Hillbilly1
Quote:
Originally Posted by BigGreenMachine View Post
So I am going to try replacing the tps for the fourth time (2nd mopar replacement) hopefully this works because if it doesn't I'm bout to just take it to the dealer. I'm tired messing with it
I seriously doubt you had 4 bad sensors in a row, and if you don't want to try the clock spring disconnect thing, which cost you nothing but your time, you do need to take it to a dealer. TPS sensors are a simple balanced variable resistor, not much to go wrong with them other than mechanical failure due to water intrusion or wear and tear on the operating mechanism. Your problem is elsewhere.
This thread has more than 30 replies. Click here to review the whole thread.

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -5. The time now is 07:10 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC