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random multiple cylinder misfire after plug/wire

This is a discussion on random multiple cylinder misfire after plug/wire within the General Help forums, part of the LSx Technical Help Section category; i just changed my plugs and wires and the ses light is flashing. i hooked up the diablo and got ...

  1. #1
    caraholic ggino85's Avatar
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    blue green chameleon
    1998 Trans Am

    random multiple cylinder misfire after plug/wire

    i just changed my plugs and wires and the ses light is flashing. i hooked up the diablo and got (forgot code) but it was a random multiple cylinder misfire. plugs are ngktr55's gapped at .055 and msd wires. oh yeah i didnt do #8 yet because i ran out of light but it will be done in the morning. wat would cause this

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    Slow'er'Ass Mr. Luos's Avatar
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    Sounds like a wire arcing.


    I bet a wire isn't all the way on.

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    caraholic ggino85's Avatar
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    blue green chameleon
    1998 Trans Am

    ok wait, lol i just remembered that i didnt have the #8 coil pack connected, would that cause this? i was only moving the car from the driveway to the front of my house 10ft when i saw the ses light flashing completely freaked out and didnt remember the coil pack being disconnected at all.

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    Slow'er'Ass Mr. Luos's Avatar
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    caraholic ggino85's Avatar
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    blue green chameleon
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    caraholic ggino85's Avatar
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    blue green chameleon
    1998 Trans Am

    hey luos (or anyone else who knows) i was matching my old plugs with the spark plug condition pics in the back of the haynes book and they match the TOO HOT pic. they are blistered white. it says check for correct plug heat range, wats that? the gapping? any ideas on wat the cause of this might be?

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    Slow'er'Ass Mr. Luos's Avatar
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    White normally means lean.

    Which would be odd for a near stock or stock car since the computer normally has them running rich a little bit.

  8. #8
    caraholic ggino85's Avatar
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    blue green chameleon
    1998 Trans Am

    okay i did it finally got #8, the car runs 10times smoother, i couldnt believe it i could hardly tell the engine was running (exhaust gave it away) yea i was thinking the white plugs were kinda weird, they were denso plugs or somthing like that. are those the stockers? i did have the slp power tune(from the diablo tuner) programmed on the car for a little bit, 3000 miles, would that do it.

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    Slow'er'Ass Mr. Luos's Avatar
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    Yes it would.

    They tend to lean you out a little to gain power.
    If possible...dtich that thing.

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    caraholic ggino85's Avatar
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    blue green chameleon
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    i took the tune off awhile back, i only use it for diagnostics now, a 400$ obd2 reader is pretty much all it is, makes me wanna

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