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random engine misfire

This is a discussion on random engine misfire within the External Engine forums, part of the LSx Technical Help Section category; I just installed pace setter long tube headers with an off-road y-pipe and O2 sims on my 02 ws6 and ...

  1. #1
    Junior Member
    Join Date
    Nov 2005

    02 TA WS6

    Exclamation random engine misfire

    I just installed pace setter long tube headers with an off-road y-pipe and O2 sims on my 02 ws6 and everything went together fine. But when I started up the car it sratred back firing like crazy and the SES light started flashing. I read the code and it said mulitple cylinder random misfire. and I have no clue what the hell is wrong. any help would be awesome.

  2. #2
    Senior Member mrr23's Avatar
    Join Date
    Jul 2005
    orlando, fl

    dark bowling green
    2000 corvette

    are all of the plug wires completely pushed onto the coils and plugs? when you push the wire onto the coil, you'll hear two clicks. only one click when going onto the plug. some code readers will tell you exactly which cylinder it is.

    P0300 - random
    P0301 - #1
    P0302 - #2

  3. #3
    Senior Member SeVeReDiStOrTiOn's Avatar
    Join Date
    Aug 2005
    Roseville, CA

    05 Wrangler
    00 Z28 sold :-(

    ^^^ Also go back and retrack all the basics....make sure the sims are only on the rear o2's, wires on the right plugs...etc

  4. #4
    I Fixed Da Rear jimbo98z's Avatar
    Join Date
    Aug 2005
    Raleigh, NC

    Mystic Teal
    1998 Z28 M6

    One thing that happene with mine is that I knocked the coolant temperature sensor off (broke it) while putting the headers on. It made my car run very rich when it was cold, and it would backfire some. The sensor is on the driver's side going into the side of the head, right above the very front of the header

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