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Engine missing really bad....sometimes?

This is a discussion on Engine missing really bad....sometimes? within the General Help forums, part of the LSx Technical Help Section category; I just bought this car a couple of weeks ago and it started missing on my 5 hour drive home ...

  1. #1

    Engine missing really bad....sometimes?

    I just bought this car a couple of weeks ago and it started missing on my 5 hour drive home from buying it. But then the next day it was fine. The car seems to be running really rich. There is a lot of black dust on the rear bumper cover and it pops when I shift. I started with a tuneup. New plugs and wires, O2 sims, changed the oil, and cleaned the MAF and air filter. It ran fine for a day or so and then it started missing again. It sounds like it has a cam now. Where do I start?
    It threw a SES code one day last week, but it went off before I could check it.

  2. #2
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Roseville, CA

    05 Wrangler
    00 Z28 sold :-(

    Have it scanned....even though the light is off the code will still be in there. On the stock tune my car was running rich also......and the pop is probably just a back pressure pop from your exhaust.

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