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Jeep Wrangler JK
JK General Discussion
Code P0300 after replacing almost everything
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<blockquote data-quote="Elteejo" data-source="post: 449753" data-attributes="member: 23824"><p>I need help and some ideas everyone. </p><p>2012 JK Unlimited Sahara </p><p>138k miles</p><p></p><p>Sorry for the long post but trying to get all the info out at once to be specific. </p><p></p><p>Purchased a JK from a friend about a year ago and have had no issues until recently. About 2 weeks ago, I was driving along fine and out of nowhere lost power, went into limp mode and CEL came on. Took it home, ran an ODB 2 on it and got P0300 (Multiple Cylinder Misfire) and P0018 (Crankshaft/Camshaft Timing Misalignment - Bank 2 Sensor 1). Did some research and looked into the forums here and long story short, over the last 2 weeks, I’ve replaced the following with zero improvement: </p><p>Oil Change</p><p>Transmission Fluid Change</p><p>Spark Plugs</p><p>Ignition Coils</p><p>Camshaft Sensor (both banks)</p><p>Crankshaft Sensor</p><p>All O2 sensors</p><p>VVT Solenoids</p><p>and ran Sea Foam through the throttle body. </p><p></p><p>When I start it up it runs fine for about 30 seconds, then the idle drops to around 750 rpm’s and it shudders. When I accelerate (in park) it’ll run fine but when I release the gas it falls to around 500rpm and shudders worse before settling back at around 750. </p><p></p><p>I’ve been told by a buddy of mine who owns a shop to maybe do the throttle body because the sensor is built into those, the only sensor I think I haven’t changed. Since it’s starting normally then dropping after a bit, I tend to think mechanically it’s ok and it’s a computer or wiring problem. </p><p> I’m out of ideas though and would love any and all feedback if anyone has seen this, fixed this, or if I’m missing something obvious. Thanks.</p><p></p><p>[ATTACH=full]121783[/ATTACH]</p><p></p><p>[ATTACH=full]121784[/ATTACH]</p></blockquote><p></p>
[QUOTE="Elteejo, post: 449753, member: 23824"] I need help and some ideas everyone. 2012 JK Unlimited Sahara 138k miles Sorry for the long post but trying to get all the info out at once to be specific. Purchased a JK from a friend about a year ago and have had no issues until recently. About 2 weeks ago, I was driving along fine and out of nowhere lost power, went into limp mode and CEL came on. Took it home, ran an ODB 2 on it and got P0300 (Multiple Cylinder Misfire) and P0018 (Crankshaft/Camshaft Timing Misalignment - Bank 2 Sensor 1). Did some research and looked into the forums here and long story short, over the last 2 weeks, I’ve replaced the following with zero improvement: Oil Change Transmission Fluid Change Spark Plugs Ignition Coils Camshaft Sensor (both banks) Crankshaft Sensor All O2 sensors VVT Solenoids and ran Sea Foam through the throttle body. When I start it up it runs fine for about 30 seconds, then the idle drops to around 750 rpm’s and it shudders. When I accelerate (in park) it’ll run fine but when I release the gas it falls to around 500rpm and shudders worse before settling back at around 750. I’ve been told by a buddy of mine who owns a shop to maybe do the throttle body because the sensor is built into those, the only sensor I think I haven’t changed. Since it’s starting normally then dropping after a bit, I tend to think mechanically it’s ok and it’s a computer or wiring problem. I’m out of ideas though and would love any and all feedback if anyone has seen this, fixed this, or if I’m missing something obvious. Thanks. [ATTACH=full]121783[/ATTACH] [ATTACH=full]121784[/ATTACH] [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Code P0300 after replacing almost everything
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