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  1. K

    Hesitation or Stuttering around 40-50MPH. Bout to sell the thing

    I second the live data suggestion. There's a wealth of information to be found in what you get from it. Specifically, it will tell you what your TPS values are, then you can compare that to what they should be. You'll get info from other sensors, as well, like the MAP. Throwing parts at it in...
  2. K

    Engine stutters when AC is on

    Is the stuttering the result of the RPMs being too low or something else?
  3. K

    Won’t Crank When Hot

    When it's acting up, have someone turn the key while and look for +12V voltage down at the starter solenoid. If you don't get anything, you need to backtrack. If you have power there, grab a negative jumper cable and throw one end on the battery negative and the other on the starter case. Turn...
  4. K

    2003 3.7L - RPM drop when throttling

    Sorry for the delay. Can u copy/paste what's in that file to this thread here?
  5. K

    P1072 &P1075 won’t go away

    The "correct" ones should be NTK brand (from a reputable source) OR one from the dealer (which is just an NTK with an added dealer commission). Post the live data information here. Is your parts changer (i.e. mechanic) the one who's done all this work?
  6. K

    Humming noise starts at 40mph

    Wheel bearings can feel tight but be failing nonetheless. Invest in a Chassis Ear, or a knock off of one, to help narrow down where it's coming from.
  7. K

    2003 3.7L - RPM drop when throttling

    Remember, only buy NTK brand and make sure it's from a legit source. No ebay and amazon only if it's being sold by them directly. In the meantime, you may want to disconnect the electrical plugs on both O2s just to see if your problem improves. That should keep the car in open loop mode, where...
  8. K

    Engine codes p0122 & p0139

    I doubt the problem is related to the EVAP. If you have access to a live data reading scanner, post the values you're getting from the TPS %, especially at the point when the CEL comes on. You could also back probe the terminals on the sensor to see if you're getting the proper voltages and...
  9. K

    2003 3.7L - RPM drop when throttling

    Fuel trims, at least at idle, should quickly switch between +/-5%. The reason the mixture goes from slightly rich to slightly lean like this is so the catalyst can do its job properly. The -10.156% and -9.375% fuel trims you reported are excessive, especially if they stay at those values and do...
  10. K

    Cylinder 2 misfire only at start up

    How did the #2 spark lug look in comparison to others in the engine? If #2 looked vastly different (and all plugs have the same mileage). I would suspect you have an issue in that cylinder like a bad head gasket or detonation.
  11. K

    A/C question

    That certainly is an odd problem. It usually goes the other way around- ac is cold at highway speed but not around town- due to reduced airflow around the condenser, among other causes.
  12. K

    Brake grabbing

    Which wheels are affected/getting hot? When things are cool, you may want to jack up both front wheels and spin each individually by hand, then jack up both rear wheels and do the same, to see if any brake feel like it's dragging. Trans in neutral. If no wheel feels like it's dragging and all...
  13. K

    ABS problems after new bearing

    Sorry, I don't know the answer to that. I've never had a scanner that could do ABS, so I don't know how detailed the info gets there. I would imagine a capable enough unit would be able to display that kind of info. On that note, u may want to take your car to Advance (if you have one near...
  14. K

    ABS problems after new bearing

    If there is a problem with a wheel speed sensor (or somewhere along its wiring), the PCM may initially think that wheel is losing traction and engage the traction control, causing the engine to buck/stutter. It may eventually figure out what the real problem is and ignore input from that sensor...
  15. K

    03 Liberty worth saving?

    I think Glenn was referring to a broken COMPRESSION ring, not an oil ring. There are several different rings on a piston. A worn/broken compression ring causes excessive pressure in the crankcase (blowby), which can cause oil leaks. Worn/broken oil rings allow engine oil to enter the combustion...
  16. K

    Random Misfire 2007 Liberty

    What color is the smoke? Do you know why your mechanic put a new pump in? Scan the PCM for codes also see what fuel trims are.
  17. K

    03 Liberty worth saving?

    I think the question is, why is compression down on that cylinder and can u do the work yourself? It could just be a rocker arm that popped off or a bad lifter. Doing a leak down test and/or pulling the valve cover to have a look see would help narrow down what's up. BTW, P0306 relates to...
  18. K

    Help-Idle issue

    Throw a scanner on it.. Look for codes and see what live data looks like .
  19. K

    sudden Catalytic Converter blowout?

    Scan the vehicle for codes (even if the CEL is not lit). If there are no codes relating to the rear oxygen sensors or no "below threshold codes," it's highly doubtful anything is wrong with the catalytics.....
  20. K

    Help - how to diagnose a bad catalytic converter?

    There's s pretty simple trick, of sorts, to get your Lib to pass inspection if it has an EVAP code. That is if your state allows for at least one monitor to be incomplete prior to the test due to the age of your vehicle, I know NY allows for one incomplete on my '06. Not sure where u heard...

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