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Old 07-08-2012, 02:28 PM   #91
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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.

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Old 07-08-2012, 02:29 PM   #92
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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?

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Old 07-12-2012, 02:31 PM   #93
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Anything?
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Old 07-13-2012, 12:11 AM   #94
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Hello?
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Old 07-13-2012, 09:13 AM   #95
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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.
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Old 07-13-2012, 10:21 AM   #96
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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.
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Old 07-13-2012, 11:05 AM   #97
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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...
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Old 07-13-2012, 11:36 AM   #98
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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 [:
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Old 07-13-2012, 12:58 PM   #99
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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.
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Old 07-13-2012, 01:01 PM   #100
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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?
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Old 07-14-2012, 02:02 AM   #101
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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.
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Old 07-14-2012, 09:23 AM   #102
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Did you leave it in the jeep?
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Old 07-15-2012, 08:48 AM   #103
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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.
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Old 07-15-2012, 11:35 PM   #104
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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???
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Old 07-16-2012, 01:21 PM   #105
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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.
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Old 12-29-2012, 08:25 PM   #106
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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...
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Old 12-29-2012, 11:06 PM   #107
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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

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