Thread: AL 104 spark plug showing misfires...

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  1. #1 AL 104 spark plug showing misfires... 
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    decided to try the Al 104 back into my car and the aeroforce shows "2" misfires on a few cylinders now and then.... is that normal? there brand new plugs . had 0 misfire with stock ac delco .....that how i know its plugs....
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  2. #2 Re: AL 104 spark plug showing misfires... 
    Perma-Banned! JK LOL Explicit_Spade's Avatar
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    What's the gap on the 104s?
    Quote Originally Posted by W-Body Store
    Remember, GM engineers didn't take into account your need for speed.
    Daily Driver: 06 Grand Prix GT / 9.4:1 CR / IS3 Heads / Ported Gen V / ZZP Headers / HPT Pro / Pulleys: 4.25, 3.8, 3.5, 3.4, 3.2, 3.0, 2.9, 2.7
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  3. #3 Re: AL 104 spark plug showing misfires... 
    GXP Level Member txslow6's Avatar
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    Pull the two plugs. I have a feeling that one of those will probably be cylinder 6. Not uncommon to accidentally crack the porcelain on the plug. Also double check to make sure your wires are snug and they "snapped" in place.
    85 Corvette
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  4. #4 Re: AL 104 spark plug showing misfires... 
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    Gap at 53. Tgou and no they arent cracked and rubbers snapped on good
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  5. #5 Re: AL 104 spark plug showing misfires... 
    DUI BABY Bio248's Avatar
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    random misfiring is a 3800 staple. it happens even on healthy stock motors.

    im assuming this is at idle?
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  6. #6 Re: AL 104 spark plug showing misfires... 
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    Yes on idle . Ive been running the plugs for a few hrs now and its getting better.
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  7. #7 Re: AL 104 spark plug showing misfires... 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    modded 3800's LOVE to misfire at idle.

    SMGPFC Member #1
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  8. #8 Re: AL 104 spark plug showing misfires... 
    I live here. SlowNA06's Avatar
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    Would having spark plugs 2 ranges colder than you should cause misfires?
    Irridium spark plugs last 100k mi and work just as well as copper. Copper is a waste on N/A and only lasts 15k mi. Don't use Platinum.
    Use 195* tstat unless you can thoroughly explain why not; 99.9% don't need a lower temp.
    Almost any oil filter, ever, is of higher quality than ACDelco. Spend $6+.
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  9. #9 Re: AL 104 spark plug showing misfires... 
    GT Level Member 94GrandPrixSE's Avatar
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    2 years late, yes
    02 GTP - Cartuning Turbo Kit VS67 3" DP, 80#INJ, N*,LQ4 MAF, Custom Cam, Roller Rockers, 130#, P&P Heads, Meth, AL103's, Corn fed, 522WHP on a mustang dyno, HP Tuners by me.
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