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Old 01-18-2014, 03:30 PM   #1
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Unhappy 03 Rubicon problems

I have a completely stock 2003 5 speed Rubicon with 106K miles oil changed every 2500-3k. At 100k I replaced the radiator, water pump, thermostat, hoses, and fan clutch all mopar. I also installed autolite XP985 plugs at 105k soon after the cel would show up with a p1022 tps low voltage. Shorty after the cel I had very sluggish acceleration and very poor gas milage. So i replaced the TPS on thursday and everything went back to normal till this morning. When accelerating it moves but there is no power until 3k rpms. below 3k rpms the the speedo just barely climbs. When i press the gas slightly I hear a sound i cant describe there is also a new smell under the hood that i've never smelt before almost like burning plastic but not. I plugged in my scan tool and no codes all live data numbers seem normal. I already purchased an NTK upstream front o2 sensor hoping that will help. Any help or input would be great.




-Mike

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Old 01-18-2014, 03:37 PM   #2
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I'd check the plugs again. Never happened to me but I've heard of them climbing their way out. Hope it's that simple

You did adjust your tps correctly?

Maybe the tps moved out a little that's possible too read this http://www.jeepforum.com/forum/f9/th...sensor-519437/

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Old 01-18-2014, 03:47 PM   #3
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Also reset the computer that might do the trick too.
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Old 01-18-2014, 03:50 PM   #4
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I disconnected the battery as soon as i got home today for 5 mins and went for a test drive the problems were the same. I didn't even know the tps had to be adjusted how do i do that?
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Old 01-18-2014, 03:51 PM   #5
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Little to go on but perhaps major vacuum leak making sound and affecting power
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Old 01-18-2014, 03:55 PM   #6
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Quote:
Originally Posted by blackrubi03 View Post
I disconnected the battery as soon as i got home today for 5 mins and went for a test drive the problems were the same. I didn't even know the tps had to be adjusted how do i do that?
It's in the link I posted but it's worth checking the voltages on it.
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Old 01-18-2014, 03:57 PM   #7
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Little to go on but perhaps major vacuum leak making sound and affecting power
That would have to be a monster leak. My entire driver side fender is crushed and all the vacuum components with it. No cruise or heat selection and an audible hiss @ 1700 rpms. No loss of power or economy for the last 2 months it's been like that.
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Old 01-18-2014, 04:00 PM   #8
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Old 01-18-2014, 04:09 PM   #9
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I just read the whole thread and it's seems like it should adjust automatically and i can't find my voltmeter at the moment.
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Old 01-18-2014, 04:11 PM   #10
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The TJ's TPS is self adjusting and has been since day one. Earlier vehicles have TPS's that need adjusting, but not the TJ's... it is not adjustable.

For the OP's problem, I'm leaning towards a bad upstream 02 sensor at this point, especially based on the odor you detected. A bad 02 sensor can cause the PCM to throw the air/fuel mixture ratio to full rich which will cause gasoline-rich odor. The '03 Rubicon has two upstream 02 sensors, they are mounted just above the two pre-catalytic converters mounted low on the exhaust header down pipes.

A bad 02 sensor will not always light the Check Engine Light or generate a diagnostic code.
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Old 01-18-2014, 04:15 PM   #11
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I don't think i have a vacuum leak but i did notice that my pcv elbows on the valve cover are leaking oil. The pcv or ccv at that back of the valve cover I think needs to be replaced the end that attached near the throttle-body looks worn. What is that hose called so i can replace it?
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Old 01-18-2014, 04:15 PM   #12
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Should be running APP985 double platinum plugs in your 03, not the single platinum AP985.
Probably not your problem though.
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Old 01-18-2014, 04:21 PM   #13
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The XP985 are iridium not platinum does that matter.
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Old 01-18-2014, 04:22 PM   #14
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Originally Posted by TJDave View Post
Should be running APP985 double platinum plugs in your 03, not the single platinum AP985.
Your eyes must be going bad like mine are, he said he is running the XP985 which is even better than the excellent APP985.
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Old 01-18-2014, 04:24 PM   #15
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Thanks for your help guys. Jerry i already purchased 1 ntk upstream front 02 do i need to pick up the same sensor or do i purchase a rear to change both the upstream sensors?
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Old 01-18-2014, 05:20 PM   #16
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Your eyes must be going bad like mine are, he said he is running the XP985 which is even better than the excellent APP985.
Holy smokes! Could of sworn I read AP in the original post.
Nevermind. XPs are great.

Time for me to see the eye doctor.
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Old 01-18-2014, 09:50 PM   #17
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I'm changing both upstream o2 sensors tomorrow if that doesn't fix the problem could it be the fuel pump or coil? I also noticed my passenger front break is worn significantly more then the drivers side could the caliper be stuck and causing this problem? When i would rotate my tires i notice the front passenger tire would always wear more then the rest but the tire was worn evenly.
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Old 01-18-2014, 10:02 PM   #18
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If one front brake drags it should pull to one side

If the fuel pump was marginal it should not improve at higher rpm when fuel demand rises
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Old 01-18-2014, 10:23 PM   #19
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When i brake and let go of the steering wheel the jeep goes to the right. If i keep my hands on the wheel it does not fight me at all I don't feel any pull in the wheel.
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Old 01-19-2014, 12:32 AM   #20
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Chilton manual says if during breaking it wants to turn to one side it's defective or oil contaminated brake pad.Excessive wear on rotor or pad. Loose or defective front suspension component. Defective caliper assembly. Brake pad to rotor adjustment needed for automatic adjustment. Loose caliper mounting bolts. Incorrect wheel bearing assembly.
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Old 01-19-2014, 08:19 AM   #21
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Sounds like asymmetric braking with either too much on right or too little on left

Since only when apply brakes my first blush is to little on left
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Old 01-19-2014, 12:27 PM   #22
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So its not the o2 sensors or the throttle body. After i replaced the the sensors and cleaned the throttle body i got it started right up no cel but it does not move until i get to almost 3k rpms trying to reverse out of my driveway. It feels like something is preventing me from moving until I get on it i do not feel any vibe or anything. Could something be loose be in the drive train. My 4wd works fine and the problem is still there in 4wd.
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Old 01-19-2014, 12:43 PM   #23
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Automatic or manual transmission?
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Old 01-19-2014, 12:45 PM   #24
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Manual.
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Old 01-19-2014, 06:10 PM   #25
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So another weird thing i just noticed i can't get it to stall. I can put the car in gear and leave it no gas or anything no jolting forward. I also started the car in gear no jolting forward nothing.
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Old 01-19-2014, 08:31 PM   #26
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Clutch slipping very badly?
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Old 01-19-2014, 09:07 PM   #27
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Sounds like the clutch is worn
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Old 01-20-2014, 06:52 AM   #28
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The smell was burnt clutch pad and if it slipped that bad you will likely also need a new flywheel

I am guess rather than a lack of power you were in gear with rpm rising but little vehicle movement

If this is true unless you have a park brake set and working well be sure to block the wheels or the vehicle may just roll away or into something
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Old 01-20-2014, 08:58 AM   #29
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I think your right about the clutch I'm going to order a luk clutch and flywheel now. Is there anything else I should look for or replace while I'm changing the clutch? Is there anything that could have caused the clutch to go bad because there was no warning signs other then the tps cel.
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Old 01-20-2014, 09:25 AM   #30
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Can just fail

Also people riding clutch ie part way engaged as one fellow liked to do maneuvering a trailer backup up hill can cause clutch burn wear

Basically clutch should have minimal time anywhere but full up or full down on pedal you can slow upward speed when shifting but never use it part way up on pedal for any length of time or you burn clutch

Once it starts to slip it gets hotter and hotter and it is all worse from there


Usually first sign of slippage is on highway in high gear if you stomp on gas and rpm rise without proportional vehicle speed increase you know clutch is starting to slip

Clutch plus flywheel should do it

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