Multiple Cylinder Misfire, after 7500 miles

Discussion in 'Dodge Challenger SRT Hellcat' started by SinisterKitty, Feb 15, 2015.

  1. SinisterKitty

    SinisterKitty Silver Member

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    Just got back from Mardi Gras in Louisiana, always a blast. Anyway, on the way back home to Houston the check engine light came on. I was cruising at 80 with the cruise control on. I ran the diagnostics and at first it gave me P0307 (Cylinder 7 misfire).
    image.jpg
    I got home, turned her off and let her rest for the night. This morning I started her up and it threw another code P0300 (Multiple cylinder misfire). image.jpg
    I am taking her to the dealership tomorrow. It didn't run rough or anything when it first threw the code but when I started it this morning it was idling rough and shot some black soot out of the exhaust. image.jpg
    If I let it idle for a bit the code clears but the light stays on. The effect only seems to be durning idle. I will keep you guys posted.
     
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  2. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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    We have seen this before. It was broken rocker.
     
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  3. Paladin06

    Paladin06 Have Guns Will Travel Staff Member Hellcat Car Club Gold Supporting Member

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  4. Brett M

    Brett M Silver Member

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    Ugh, that sucks. Last picture doesn't look good. Kind of like seeing a person coughing or sneezing blood :eek: Keep us posted. Hopefully nothing serious.
     
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  5. jmeyer94

    jmeyer94 Senior Hellcat Member

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    My Hell CAT throws the black soot on the garage door also. I use to start it up first before opening the door...lesson learned...open the door first even though its cold outside.
     
  6. jmeyer94

    jmeyer94 Senior Hellcat Member

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    The Hell Cat is the first car I've seen in a long time where you have to change the spark plugs at 60,000 miles.....according to owners manual
     
  7. SinisterKitty

    SinisterKitty Silver Member

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    I paid close attention the broken rocker arm forum when he first posted. Mine isn't anything like it, not losing power at all. Just idles a bit rough, then clears up. I wasn't even spirited driving, I am guessing it's a coil or plug issue. I have had similar situations with other cars before.
     
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  8. hellcat1

    hellcat1 Gold Member

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    I wonder if changing the plugs at 60k miles is under warranty
     
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  9. SinisterKitty

    SinisterKitty Silver Member

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    Well that's good to know and interesting. This was the first time mine did it. It's about 70 in Houston today, so I don't think it's temperature related.
     
  10. MVT

    MVT Silver Member

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    I saw some of this soot with moisture on the ground the other day afters starting with 175 miles. I think the soot could be a little of the oil blow by during break in and cooking in the pipes then dries and flakes. Once started it discharges it. My guess.
     
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  11. SinisterKitty

    SinisterKitty Silver Member

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    Could be, but I have 7500 miles on my car. I think it's broken in by now. Everything that's supposed to be seated has had ample time to do so. But there was moister and flakes in the soot as well, so who knows.
     
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  12. DB2

    DB2 Silver Member

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    Interesting.

    Oh well, its a car & bound to break. Let us know what they find.
     
  13. 1FSTCAT

    1FSTCAT The Punisher

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    I get fresh water puddle, very small, under the tranny area and now that I have more miles, it has some black in it. At first I thought I had a leak and then I realized the temp difference on a cold startup is causing the condensation and either dripping out of a hole or near a clamp on the exhaust. No oil, just carbon and no other type of like antifreeze or transmission fluid.
     
  14. SinisterKitty

    SinisterKitty Silver Member

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    Exactly! The only thing that sucks is that my service rep told me Chrysler doesn't provide loaner cars? Wtf. That's the first time I have ever heard anything like that from a dealer.
     
  15. 1FSTCAT

    1FSTCAT The Punisher

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    No
     

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