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I have a 2002 Jeep Liberty Limited, just had the spark plugs and coils replaced yesterday, today its not heating, there was some warm air for like 2 minutes then went back to cold. Could the spark plu

The heater was all fine before I had the spark plugs serviced. It was blowing out cold air, then a little bit warm air, then went back to cold air again. Tried all settings. Could it be the mechanics forgot to hook up something that they took off when service the spark plugs? Thanks.

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  • Jerry Feng Nov 03, 2012

    Hi Ricky, Thanks for the reply. I found my coolant was low, added some coolant, and it's all fine now. Thanks again.

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  • Jeep Master
  • 2,620 Answers

My guess would be that the thermostat is stuck in the open position causing this problem.

Posted on Nov 01, 2012

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 2920 Answers

SOURCE: 2002 GMC Yukon blows cold air from the front, rear works fine

check you antifreeze level and make sure its full

Posted on Jan 26, 2009

  • 21 Answers

SOURCE: Heater

your blend doors are broken a common problem for the jeeps 1999-2004 e mail me at mrenc@msn.com and i will send you a link to a web site for a repair kit that will cost les than the 1200-1500 a dealer will charge to fix this

Posted on Dec 02, 2009

  • 6982 Answers

SOURCE: 2002 Jeep Liberty P0174 code and mech has changed the o2 sensor

Can't tell you exactly what is wrong but the one thing you said is of concern...Map sensor should not be full of oil. If it is, I'd want to know why. In finding the reason for that, you may also find the reason why you are having a problem.
Jeep uses two kinds of engine crank venting. you either have a pcv valve or an orifice controlled system. If either are obstructed it can overpressure the crankcase and cause all kinds of problems.
Years of experience tells me this isn't something I can guess at and be 100% sure I have the right answer but based on what you said, I'd look there first!

Posted on Feb 07, 2010

  • 5 Answers

SOURCE: 2003 Jeep liberty sport a/c and heater problems

maybe ur thermostat

Posted on Apr 19, 2010

dttech
  • 4803 Answers

SOURCE: I have a 2002 Jeep Liberty Limited, 3.7 L motor.

Jeeps are notorious for having broken temperature control (Blend Air) doors. A malfunctioning Blend Air Door actuator probably caused it to break. The dash will have to be removed to replacethe door and the door actuator.

Posted on Jan 16, 2011

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1 Answer

Heater only blows hot air intermittently.


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Jeep Liberty cars & trucks heater not blowing hot air questions and answers. Ask your Jeep heater ... My 2005 Jeep Liberty will not blow heat through ... properly.

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Nov 01, 2015 | 2005 Jeep Liberty Sport

1 Answer

02 Jeep 3.7L v-6 no spark,coils and crank sensor good.HELP.


Are the spark plugs and spark plug wires the original parts that came with the car? If yes, replace them.

Jun 05, 2014 | 2002 Jeep Liberty

1 Answer

2002 jeep liberty heat only works at high rpm


Sounds like low flow issue. Flush and clean system, PROPERLY! Buy a flush kit, drain system, blow compressed air through, fill with cleaner/water mix, run for 30 min with heat on, drain system, blow out with compressed air, fill with water, run for 30 min, drain, blow out with compressed air, fill with 60% coolant mix.

Nov 26, 2013 | 2002 Jeep Liberty

1 Answer

Cant get no spark frome plug


can you tell us what engine is in your jeep liberty? most likely you have the 3.7 v-6 but we can not assume that. if you have the v-6 with a coil for each cylinder then switch the coils from a known good cylinder and see if the same cylinder is still misfiring. if so then replace the coil and the spark plug and or all the spark plugs. those coils are prone to failure.

Jul 22, 2012 | 2002 Jeep Liberty

1 Answer

2002 liberty 3.7 liter. I have replaced the coil, plugs and injector for cylinder #6. On cold starts I get a ramdom misfire code and engine is missing. If I re-start 3-4 times engine starts up and runs...


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
e.g.PO304,PO305 etc

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
do so.

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

Feb 01, 2011 | 2002 Jeep Liberty

1 Answer

Where are the spark plugs located at in my 2004 Jeep Liberty?? Would like video or pics....


The plugs are loated under each coil pack for every cylinderca82c8a.gif 1. Using compressed air, blow out any dirt or contaminants from around top of spark plug.
2. Check condition of coil O-ring (2) and replace as necessary. To aid in coil installation, apply silicone to coil O-ring (2).
3. Position ignition coil (1) into cylinder head opening and push onto spark plug. Do this while guiding coil base over mounting stud.
4. Install coil mounting stud nut (2). Tighten to 8 N·m (70 in.lbs).
5. Connect electrical connector to coil by snapping into position.
6. If necessary, install throttle body air tube.

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Apr 19, 2010 | 2005 Jeep Liberty

1 Answer

AC is cold for about 5-15 minutes when I first start 2002 Jeep Liberty (first start of the day). After that, its warm air.


sounds like you have excessive moisture in the system. you need to have the system evacuated then vacuumed and rechrge. We were just talking about this scenario today in college automotive air conditioning class hope this helps.

Jul 09, 2009 | 2002 Jeep Liberty

1 Answer

2003 3.7 Jeep Liberty Limited Air conditioner


half can is low, possible cause is that fill port is clogged happens when u put sealer in sometimes, but it sounds like your system is under charged check pressure, if no reading port is clogged change port, low reading add freon,

Jul 07, 2009 | 2003 Jeep Liberty

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