LOST JEEPS :: View topic - 2003 Liberty Misfires until warm

FSU DH77 wrote:

Hello all,

My 2003 Liberty has been misfiring with a blinking check engine light on start, but once the temperature gauge hits the quarter mark and I restart my car the misfiring stops and the light stops blinking but it stays on. I have replaced the spark plugs, ignition coils, and the ASD relay. Any idea what could be wrong?

Have you pulled the codes associated with the CEL? There are a number of things that could be causing the symptoms you're seeing, but without knowing which codes are being thrown it's a crapshoot as to where to begin troubleshooting.

Author:	FSU DH77 [ Mon Apr 20, 2020 12:42 pm ]
Post subject:	2003 Liberty Misfires until warm
Hello all, My 2003 Liberty has been misfiring with a blinking check engine light on start, but once the temperature gauge hits the quarter mark and I restart my car the misfiring stops and the light stops blinking but it stays on. I have replaced the spark plugs, ignition coils, and the ASD relay. Any idea what could be wrong?

Author:	casm [ Mon Apr 20, 2020 10:20 pm ]
Post subject:	Re: 2003 Liberty Misfires until warm
FSU DH77 wrote: Hello all, My 2003 Liberty has been misfiring with a blinking check engine light on start, but once the temperature gauge hits the quarter mark and I restart my car the misfiring stops and the light stops blinking but it stays on. I have replaced the spark plugs, ignition coils, and the ASD relay. Any idea what could be wrong? Have you pulled the codes associated with the CEL? There are a number of things that could be causing the symptoms you're seeing, but without knowing which codes are being thrown it's a crapshoot as to where to begin troubleshooting.

Author:	FSU DH77 [ Mon Apr 20, 2020 11:25 pm ]
Post subject:	Re: 2003 Liberty Misfires until warm
casm wrote: FSU DH77 wrote: Hello all, My 2003 Liberty has been misfiring with a blinking check engine light on start, but once the temperature gauge hits the quarter mark and I restart my car the misfiring stops and the light stops blinking but it stays on. I have replaced the spark plugs, ignition coils, and the ASD relay. Any idea what could be wrong? Have you pulled the codes associated with the CEL? There are a number of things that could be causing the symptoms you're seeing, but without knowing which codes are being thrown it's a crapshoot as to where to begin troubleshooting. Sorry @casm I forgot to put that major detail. OBDII reading gave me P0303 (cylinder 3 misfire), P0300 (random misfire), P0304 (cylinder 4 misfire), P0305 (cylinder 5 misfire), P0306 (cylinder 6 misfire), and P0302 (cylinder 2 misfire).

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