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Chrysler 300 Mechanical Problems and Questions Discuss any Chrysler 300 mechanical problems/questions in this forum. Engine, trans, supension, body, interior moving parts, interior/exterior trim panels, etc.


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  #1  
Old 12-06-2009, 04:22 AM
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Exclamation Need Help and Suggestions car shutting off.

Hey how are you guys doing? I need some serious help. I have a 2007 Chrysler 300 touring 3.5L . It has 49k miles on it, and today I changed my spark plugs. I bought the E3 diamondfire spark plugs from Kragens to replace the factory spark plugs. I installed them and made sure everything was plugged in correctly. Then I reset the battery and tried starting up my car. First it made a funny sound and the RPM's were at .500 and then it jumped to 3000 and was being very loud as it idled. A loud noise was coming from the intake manifold like a loose hose but nothing was loose. I let the car run for a minute and it made a odd sound and it shut itself off. I started the car back up and drove it for a while, the E3 spark plugs really made a huge difference i could feel the power gains as well as impressive throttle response. Whenever i had to stop at a red light or a stop sign a red lightning bolt would flash on my dash and the car would immediately shut off on me. As i merged off the freeway i was going about 40mph as i slowly applied the brakes and the red lighting bolt started flashing, immediately the car lost traction and I slid off the road. Luckily I didn't hit anything. The car ran decent but when it idles or I have to stop for anything more than 5-10 seconds the light flashes and the car immediately turns off on me. The check engine light has just come on and I used a OBD-2 reader to read it and it came up with P0507, which is something with throttle body or idle too high. I removed the E3 spark plugs and put in my old stock ones, but the car still shuts itself off after I idle for 5-10 seconds. Its idling about 300-600 RPM's more than normal and it sounds rough. I removed these also and then bought BOSCH platinum spark plugs which they recommend to me and then installed these, and my car is still flashing the red lighting bolt on idle or when i stop or I'm not moving or pressing on the accelerator. and then it cuts off immediately Now my engine light is saying 2 misfires when i ran diagnostics again. My car isnt running good at all Im scared to even start it. I have a stage 2 AFE cold air intake, and flowmaster exhaust, i don't know if that makes a difference. I'm really screwed right now someone please help me out with anything. I really appreciate it
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Last edited by CALI300; 12-06-2009 at 04:28 AM.
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Old 12-06-2009, 08:23 AM
Peter Parker Peter Parker is offline
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The car is misfiring when the lightning bolt flashes, what misfire codes did you see? A generic P0300 or P0301-P0306 (specific cylinders)? Prior to replacing the stock spark plugs did you have any of these problems? If not, I'ld really double check all the electrical wires and vacuum lines to make sure something didn't get swapped or messed up in the replacement plug install. Stock throttle body, correct?
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Old 12-06-2009, 11:51 AM
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yeah it sounds like the ITA sensor or something like that got unplugged. Easy to do when changing things out and a harness is in your way
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Old 12-06-2009, 12:26 PM
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Check all the sensor plugs to make sure they are all in place and snug.

Most P05xx codes, if not due to a faulty sensor circuit, can be caused by the idle air control motor and in those cases, it is usually replaced if they find no electrical continuity across the motor leads.
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Old 04-22-2014, 02:10 AM
red13142004 red13142004 is offline
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same problem. Did you fix it??
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Old 05-05-2014, 03:13 AM
Shunniebunnie Shunniebunnie is offline
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Hello everyone I'm New and I don't know how to start a thread and I need Help!! I have a 2010 Chrysler 300 Touring and my accelerator fell off today yes fell off while driving. Thank God nobody was hurt but has any one else had this problem before?
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Old 05-05-2014, 03:15 AM
Shunniebunnie Shunniebunnie is offline
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I had the same problem misfire in the number 5 plug well burns out I had a warped cylinder head. Hope this helps
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Old 05-12-2014, 10:41 PM
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I would Run stock plugs.
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