Question about 2002 Jeep Liberty
Should I repair or buy another engine?
Check first coil pack for #3 if it is within the specified resistance range.
if you think which one more cheaper, repair or buy an engine.
Posted on Feb 22, 2012
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Posted on Jan 02, 2017
Model: LIBERTY - SPORT
Engine: V6 - 3.7L - FI - - GAS
Part Number RC9MC4 .044" (Original Equipment Manufacturer and/or Original Equipment Equivalent)
Hope helps (remember to rated and comment this).
Posted on Sep 12, 2010
If you have Coil- on -Plug you haven't found the bad one yet
Your not always going to get a code that is correct
I would buy the injector from you, as I'm sure that wasn't it,
unless you have an air leak around it
You want no vacuum leaks,a near new EGR Valve,no
air induction tubing leaks
Clean the MAF Sensor with CRC MAF Cleaner
Clean Throttle Plate--CRC Throttle Body Cleaner
You did put anti-sieze on those spark plugs, if not
How old are the O2 Sensors
More than 80,000 mile,replace the front 2 with OEM
Specific Make--Bosch or NGK etc and not some
cut & splice universal type
Posted on Feb 01, 2011
SOURCE: 2004 - JEEP LIBERTY SPORT
P0122 Code - Throttle Position Sensor/Switch A Circuit Low Input
A P0122 code means that the the car's computer has detected that the TPS (throttle position sensor) is reporting too low a voltage. On some vehicles that lower limit is 0.17 - 0.20 volts (V).
Did you adjust it when you installed it? If the signal value is less than .17V then the PCM sets this code. Could be an open or a short to ground in the signal circuit. Or you may have lost the 5Volt reference voltage.
Symptoms may include:
* Rough or low idle
* No/little acceleration
* other symptoms may also be present
Causes: A code P0122 may mean that one or more of the following has happened:
* TPS not mounted securely
* TPS circuit short to ground or another wire
* Faulty TPS
* Damaged computer (PCM)
Possible Solutions: Some recommended troubleshooting and repair steps are:
* Carefully check the throttle position sensor (TPS), wiring connector, and wiring for breaks, etc. Repair or replace as necessary
* Check the voltage at the TPS (refer to a service manual for your vehicle for specific information). If the voltage is too low that is indicative of a problem. Replace if necessary.
* If recently replaced the TPS may need to be adjusted. On some vehicles the installation instructions call for the TPS to be properly aligned or adjusted, consult a repair manual for specifics.
* If there are no symptoms at all, the problem may be intermittent and clearing the code may resolve the issue temporarily. If this is the case then you should definitely check the wiring to be sure it's not rubbing on anything, grounding, etc. The code may come back.
Hope helps (remember to rate this answer).
Posted on Mar 01, 2011
SOURCE: I have a knocking noise
I HAVE SAME JEEP SAME PROBLEM...I have found out after research that all these jeeps like yours and mine have a common problem with engine clogging and the valves sticking and the rocker arms coming off.....This is true I pulled my valve cover off and the rocker arm had come off because the valve was stuck ....Pressure between the rocker and the cam and the valve is the only thing that will keep the rockers from falling off......And when the valve starts to stick the rocker falls off.....This is sad but true.....Also it is badly clogged with black chuncks of burnt oil....I dont know what causes this other than the wrong weight oil....but I only used the wrong oil maybe 2 times...
There should be a recall on these because the rocker arms shouldnt come off.....I think the rockers are wrong from the factory....I am a level 2 chrysler tech.and also ASE certified.......It makes me angry that they built these so weak !! ....All you can do is remove the heads and have a complete valve job done and clean the oil pick-up tube in the oil pan as well....then a complete engine flush..
.....ONLY use 5w20 weight oil also........If you dont have the cash dont tear it down cause I almost guarantee you have the same problem as I.............Hope this helps.................Metalpoet
Posted on Mar 07, 2011
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