Thread: Misfire like no other

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  1. #21 Re: Misfire like no other 
    GrandPrix Junkie
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    only sure way to tell is a tear down
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  2. #22 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    yea i kno its just more work than i want to do
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  3. #23 Re: Misfire like no other 
    I say it with pictures Abrasive's Avatar
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    The one Reptile was talking about actually had the supercharger gasket hanging up on the coolant o-rings that run thru it and it was sucking coolant from there. You might look it over really good after you get the supercharger off and you may not need to go any further if yours is getting sucked in there also.

    Master Certified Auto Glass Technician - 23+ yrs in the biz.
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  4. #24 Re: Misfire like no other 
    Bastard Reptile's Avatar
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    It's a shame you're so far out there, or I'd offer to help.

    Now, just to say something else. It is most likely NOT a head gasket, and I'll tell ya why. If it were one, the cylinder pressure would eventually blow the top off of your overflow bottle. The manifold pulls vacuum, which is probably why your engine is only sucking coolant. But, once you get the manifold off it should be pretty clear where the coolant is coming in at. It always leaves a trace.
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  5. #25 Re: Misfire like no other 
    I live here. SyntheticShield's Avatar
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    Quote Originally Posted by Reptile View Post
    It's a shame you're so far out there, or I'd offer to help.

    Now, just to say something else. It is most likely NOT a head gasket, and I'll tell ya why. If it were one, the cylinder pressure would eventually blow the top off of your overflow bottle. The manifold pulls vacuum, which is probably why your engine is only sucking coolant. But, once you get the manifold off it should be pretty clear where the coolant is coming in at. It always leaves a trace.
    To that point, I once read an old school troubleshooting technique where if you have a bad/blown head gasket you let the car sit over night, then go out and start it up and grap the upper radiator hose. If the head gasket is bad, that hose will pressurize within seconds of the engine being started.
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  6. #26 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    ok well i checked for coolant in the cyl. no coolant on plugs. right now im more worried about this miss fire the coolants not in the oil so not to worried. well this miss fire seems to be bad plugs. the bad thing is the spark is not going through the spak plug instead it sparks off to the insulator. spak plug or wire. (the wire is a cheep set i bought last summer.
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  7. #27 Re: Misfire like no other 
    GrandPrix Junkie
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    may as well replace both the cost isn't that much really
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  8. #28 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    What plug will last the longest. and for wires MSD's or or Taylor.
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  9. #29 Re: Misfire like no other 
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    For the best performance go sc delco plugs and wires plgs there wiers are lifetime warranty sp?
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  10. #30 Re: Misfire like no other 
    GTP Level Member Toasty's Avatar
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    taylor or jacobs wires.

    as for plugs, depends on your mods and plans for the car. ?
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  11. #31 Re: Misfire like no other 
    Bastard Reptile's Avatar
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    Quote Originally Posted by 19SE92 View Post
    For the best performance go sc delco plugs and wires plgs there wiers are lifetime warranty sp?
    Inaccurate. Different plugs for different performance gains.

    Longevity go with platinum or iridium. If you want a good plug but don't mind changing them once a year, get coppers like the run of the mill 104's.
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  12. #32 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    i really dont mind changing them but the last 2 sets or plugs have barely lasted me 6 months. first set was NGK second was AC delco platinum. i just want a plug that doesnt cost 50 bucks a set.
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  13. #33 Re: Misfire like no other 
    I live here. SyntheticShield's Avatar
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    Autolite plugs cost me like a buck a piece or something from Wal-Mart. I run AL605's.
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  14. #34 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    Im looking at taylor wires shoould i get the thunder volt or the spiro pro.
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  15. #35 Re: Misfire like no other 
    Bastard Reptile's Avatar
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    Spiro pro is about the best you can get for a daily driver. They're insulated pretty well so that you won't get that interference in the radio.
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  16. #36 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    is 104's the factory heat range
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  17. #37 Re: Misfire like no other 
    I live here. SyntheticShield's Avatar
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    I dont think so. Im sure someone will correct me if Im wrong, but I thought 606's were stock heat range.
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  18. #38 Re: Misfire like no other 
    GXP Level Member Zef_66's Avatar
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    Quote Originally Posted by SyntheticShield View Post
    I dont think so. Im sure someone will correct me if Im wrong, but I thought 606's were stock heat range.
    Yeah, I think 606s are the stock heat range. 104s are 1.5-2 heat ranges cooler.
    2001 GSE
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  19. #39 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    have you ever seen this and do you know what might cause this.



    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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  20. #40 Re: Misfire like no other 
    GTX Level Member MTXGTP's Avatar
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    oops a lil big but you can see what im talking about.
    Justin Young, Kansas
    1999 silver GTP DHP pcm,3" Cattless hogan DP,Front PLOG,3.4 pulley, ported TB, ported LIM, ported supercharger housing.porting done by GBP
    coming soon: LS6 springs ,1.9rr
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