Jeep liberty misfire problems It has P0300 code which is random misfire. At idle there is a very slit miss once in a while. jeep wants to charge 280 just to check if it needs a PCM flash. Steps shown are in order. Revised intake valves & valve locks are available to address this concern. The first time I went they said it was because of bad fuel and it was causing my engine to misfire. 7 engine problems and owner experiences. My 2005 Dodge Dakota (3. I bought a scanner that reads live data, and the bank 1 fuel trims seem pretty off. Get expert tips to keep your Jeep running strong. Anyone thinking it's the right bank head? I thought all the problems were in the left, but I have read some right bank heads have been replaced. Apr 24, 2008 · Liberty Cylinder Misfire / Computer issue? My 2003 Jeep Liberty started shaking and engine light turned on in December. no guarantee. Swapped Spark Plug coil with another No Change If it were the Feb 24, 2016 · I have a 2007 Jeep liberty 3. Before you can even diagnose P0304 in your vehicle, you need to find the fourth cylinder’s location. Dec 9, 2021 · Hi all I'm having an issue with the Liberty. So to cut a very long story short, I had a blown HG, had it repaired, but now it has a misfire at idle only (4 to 5 cylinders), but drives out of it at about 1k-1. The following, are the steps I've taken to try and remedy this problem. Jun 26, 2014 · This is my first post here but I've read a lot the past couple of years and gathered a bunch of information. 040, no change. Dec 6, 2018 · P0306 is a fairly common trouble code with the Jeep Liberty. I can hear it missing and when i hooked it up to the computer it came back with misfire on cyl 2 also said 3 and 4 were detected. The code read random misfires Jan 14, 2024 · I've got a 2002 3. Ensure they are properly gapped (around . I fought the thing all winter. 2010 Jeep Liberty cylinders misfiring Has anyway dealt with this? According to my mechanic it’s a common problem. But im still leaning towards a PCM issue? Mar 9, 2005 · 2003 jeep liberty misfire I have a 2003 Jeep liberty and am also having problems with my check engine light coming on. Jun 18, 2023 · Any help would be appreciated, I have a 2012 Liberty, I had P0304 and P0300 codes come after it started running rough. Some owners also report transmission failures. 7 with a very slight misfire. There Feb 16, 2018 · But then the misfire returned immediately after starting it a second time just like yours. Dec 27, 2006 · I am currently struggling with a misfire on #6 cylinder. The usually happens once or twice a week on a cold start. Learn more from here with solutions. Dec 23, 2022 · If your Jeep TJ 4. STFT at idle is around Feb 15, 2024 · '06 Liberty 3,7. Jun 22, 2025 · The Jeep Liberty with the 3. She took it a dealer where she Jul 26, 2025 · This comprehensive guide identifies the most problematic Jeep Liberty model years, explains their common issues, and suggests more reliable alternatives to consider. I've been trying to remedy this for a month. I own a 2003 Liberty sport with the 3. The symptoms are so subtle, you can barely notice it. However, like any vehicle, it comes with its own set of challenges, particularly regarding engine performance and reliability. It all started 4 months ago. You can change coils or throw liquid snake oil in the tank all day long and that's not going to help. Problem would come and go. A damaged or faulty spark plug, even if new, can cause a misfire. Aug 18, 2020 · My first thought with those symptoms would of also been either a misfire or a vacuum leak. Scoped for secondary waveform on its COP and got no signal (tested adjacent COPs and got a good pattern). Check engine light is on and sometimes flashes. And before anyone shouts out "have you checked out the dozens of other misfire threads?" Yes, I have. And a P0456 very small EVAP leak. 7, and I’m getting the P0305 misfire code. 7. Jan 18, 2025 · 2010 Jeep Liberty Misfire **PLEASE HELP** Jump to Latest 518 views 3 replies 4 participants last post by azcromntic Jan 30, 2025 G See Jeep Liberty repair and maintenance costs averaging $674 annually. Owners have reported various symptoms that indicate potential problems with the engine, which can lead to frustrating Jan 27, 2010 · (manual tran). They pulled the coil pack (sorry if this is wrong name, I'm not technical) and they said it tested good. The code was cylinder #3 misfire. 7 V6. 7 engine common problems include oil leaks, Engine Light/Misfire, and lower ball joints, overheating. Apr 15, 2018 · OT, Jeep Liberty Misfire Problem by moomba32 » Tue Apr 10, 2018 11:57 am It's a 2004 Jeep Liberty with 3. Code still reads cylinder 6 misfire. 7L V6) has been acting up the last few months. Random misfires (p0300, P030x, P035x), the codes listed at times 12 different Dec 30, 2013 · I know this is a Jeep Liberty forum, but my 2005 Dodge Dakota has the same engine, so I thought y'all might be able to help me. Did you also take care of all the Positive (+) connections including the battery clamps/posts? Jun 23, 2025 · Some Jeep Liberty owners report experiencing cylinder misfire issues indicated by error codes P0301 and P0300, which may suggest a voltage leak and necessitate the replacement of coil packs, wires, and spark plugs. Then replaced all coils with new Jul 27, 2009 · CEL came on. Replaced plugs with NGKs at 0. Also, consider inspecting the camshaft position sensor and fuel injectors for proper function. This will be the third time I have to go back. Jeep is a 2011 with 90K+ miles. It idles rough but runs fine at higher RPM. After a couple days of driving it I have a good feel for the symptoms. Learn about this problem, why it occurs, and how to fix it. Then light came back on the next day. A few nights ago while driving to work, the car started shaking as I was hitting the accelerator and the check engine light came on. It's and OBD2 code and stands for: P0306 is certainly a cause for concern, and should be considered a threat to the drivability your Liberty. They stated that I should use premium gas. Compression tested good. Yeah a clicking relay can be an indication that its coil is not receiving enough holding voltage. It's throwing a P0302 #2 cylinder misfire and occasionally a P0300 multiple cylinder misfire. They ruled out the coil pack due to the waste spark system and the misfire being isolated to cylinder #1. Replaced spark plugs and light went off after driving for about 20 miles. I then disconnected COP primary plug (which is 2 pin) and probed the May 19, 2009 · intermittent misfire (P0306), 2002 Liberty 3. About 3 months ago, I was driving on the Nov 4, 2016 · I've got a unique misfire problem. There is a problem with the intake valves sealing and there is a bulletin to repair it. 2012 Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves An engine misfire at idle ( rough idle ), accompanied by illumination or flashing of the check engine light , could indicate a problem with one or more of the intake valves. Jan 20, 2024 · 2004 jeep liberty common problems include Misfire Due to Intake Valve Lock, Power Window Motor Fail, Sky Slider Sunroof Not Opening, etc. I parked, went into work. Apr 7, 2009 · Well, here is my story. I replaced the the three coils Standard Blue May 10, 2014 · Hello all, I have read many posts on this topic, and since most of them seem to be old, I thought I would start fresh and see if anyone has found a solution for this problem. Other users offer suggestions, such as checking the cylinder, the valve, the vacuum, and the TPCM. On “V” configuration engines, it’ll usually be the second cylinder on the head further away from the front of the Apr 21, 2025 · Discover common issues, recalls, and TSBs related to the 2006 Jeep Liberty 3. Replaced ignition coil on cylinder 6 (driver's side closest to firewall, is the one I replaced. They pulled the plugs and they looked fine. Turned the Jeep off, restarted, ran fine getting home. I have a 2004 Liberty with the 3. They needed further permission to dig deeper because the they need to do a. I changed plugs and put a new coil This 2010 Jeep Liberty has a significant random misfire, so let's fix it!We'll go through the full diagnosing process and get to the bottom of this quick. The computer is throwing a code of P0306, I have replaced the spark Jun 14, 2023 · Learn about the 10 most common Jeep Liberty diesel engine problems and how to fix them. AT THESE GAS PRICES? Sep 17, 2018 · Dropped the Jeep off at the dealer today for p0305 (cylinder 5 misfire). Having issues with my 2004 Liberty. 0 is misfiring and idling rough after a spark plug change, especially with a P0301 code, start by re-examining the spark plugs themselves. The more noticeable problem is that when Mar 21, 2023 · Greets from down under. 5k rpm. So I'm having an issue or maybe 2. They swapped spark plugs and fuel injectors between cylinders #1 and #2, but the misfire persisted. If I shut off the engine and restart the miss will go away. My sister bought it in 2007 and around 2009 up came p0300 and then misfire code for each cylinder soon followed. Apr 29, 2021 · Your jumping misfire code is probably due to a lean (or possibly rich) condition on bank 2 (if this is the 3. If your Jeep Liberty has P0300 and P0302 error codes, it’s best to diagnose why the second cylinder is misfiring and see if that will fix the P0302 code. 1. 035) and undamaged. Dec 29, 2020 · A user shares their experience of troubleshooting a P0302 misfire code on a 2011 Jeep Liberty. Code for cylinder 6 misfire. The engine will run rough, obviously missing. I am working on a 2002 Jeep Liberty Sport, V6, with approx 180000 miles on it. I'm really not worried about the EVAP leak but the misfire is bothering me. The nice thing about P0306 is that it's a cylinder specific trouble code, which makes diagnosing the problems much Jun 15, 2025 · Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves - 625 reports. At first I was getting no symptoms except a check engine light. Mar 5, 2018 · Having similar problems with my wifes Liberty, ever figure out what the cause was? Jan 21, 2012 · I have seen this odd misfire problem on more than one Liberty before. Diagnosing cylinder misfire usually comes with the code P0300 On a Jeep Liberty 2002 - 2008! This is the MOST COMMON CAUSE for the 3. If problems 2011 Jeep Liberty Check Engine Light/Misfire Due to Intake Valve Locks/Valves An engine misfire at idle ( rough idle ), accompanied by illumination or flashing of the check engine light , could indicate a problem with one or more of the intake valves. Jul 26, 2025 · This comprehensive guide identifies the most problematic Jeep Liberty model years, explains their common issues, and suggests more reliable alternatives to consider. 7-liter engine has been a popular choice for many drivers who appreciate its ruggedness and off-road capabilities. Swapped #4 COP with one of those that tested good and, again, no secondary waveform. It's only thrown a code once, that never came back after clearing. Before replacing the valves I would try GM top engine cleaner. Misfire on cyl 4. My husband (mechanic) replaced the spark plugs, and the misfire continued. The code was a p0300. I Oct 4, 2018 · P0304 Definition: 4’th Cylinder- Misfire Detected 4’th Cylinder P0304 is a cylinder-specific misfire code, meaning only your Liberty’s fourth cylinder has a misfire. I did all the obvious, coils, plugs, computer, cleaned injectors, no help. Oct 25, 2023 · The 2006 Jeep Liberty with a 3. He changed the coil and the misfire continued. 044 and then to 0. 7 L V6 ! Oct 4, 2018 · P0300 in the Jeep Liberty indicates random multiple misfiring, which means that multiple cylinders are misfiring at the same time. 7), as both cyls 4 & 6 are on that bank. 7L Liberty that keeps throwing a P0305 (Cylinder 5 misfire) code. 0L, one user systematically troubleshot the issue. I use this on Lexus direct injection cars with dirty valves/misfire with success. doing a leak down test tonight to verify mechanical components. I have a 2010 Jeep Liberty with 85,000 miles. There were a a couple that were fairly similar, but lacked some variables that I'm experiencingand nobody had a definite answer for them. *Ch Oct 7, 2016 · To fix a P0301 misfire code on a Jeep Wrangler 4. My libby wont rev past 3,000 rpms and when i do it cuts power. Learn about common issues, recalls, and find certified mechanics near you at RepairPal. 7L V6 1 reading Jump to Latest 17K views 8 replies 7 participants last post by SIGP2101 Apr 17, 2015 Apr 27, 2017 · I pulled a P0132 02 sensor high circuit as well as the same P300 with high misfires in cylinders 1, 3, and 5. engine light and misfire. So to start Oct 6, 2020 · Hello all, I’m new to the forum. This problem started within 60 seconds of filling the tank so the instant thought is bad gas. yfhs ts7yg0t knk nchib zp ie7aqe ydmtdb zx btefs 6coctzu