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Detonation,,,,Clatter at WOT

This is a discussion on Detonation,,,,Clatter at WOT within the External Engine forums, part of the LSx Technical Help Section category; 2002 SS Camaro A4,,,,,, 40,000 miles I just bought the car and it is stock. I bought a SLP lid,,,,Donaldson ...

  1. #1
    Junior Member Footlead's Avatar
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    2002 SS

    Detonation,,,,Clatter at WOT

    2002 SS Camaro A4,,,,,, 40,000 miles I just bought the car and it is stock. I bought a SLP lid,,,,Donaldson Blackwing,,,and smooth bellows for it and put them all on,,,,,,Fit was great. Now under WOT,,, full acceleration it detonates and clatters with 93 octane. It did not clatter before install. I have put 2 different brands of 93 octane fuel and the same thing. Anybody know what the deal is??? Bad gas or did the simple mods change it??

    Thanks

  2. #2
    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
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    Any codes? Did you damage your maf while instailing? Check all of your connections, Maf and Iat sensor.. Make sure your maf is facing the right direction.
    J
    2001 SS, Its not the car its the Driver that matters....

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    MADE MEMBER 2002 WS6 KILLS's Avatar
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    2002 Jeep Wrangler Sahara
    Black 2002 Trans Am WS6

    ????Strange????

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    2001 WS6, 2003 SRT4(sold)

    Very strange indeed. I have something a tad similar going on, though I can't seem to reproduce it. Sometimes, whenever I am WOT and in high RPMs, I'll hear clicking/clatter... 93 Octane, Shell V-Power gas, and I've seafoamed the car. Twice. I also flushed the coolant system. Hmm.

    mods: SLP Lid, Ported & Polished TB, 3.5" Magnaflow cat-back, SFCs. 42k miles.

  5. #5
    Junior Member Footlead's Avatar
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    The MAF is facing the right direction etc.etc. Runs just fine except under WOT in gear. Everything looks fine.

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    2001 WS6, 2003 SRT4(sold)

    Change your spark plugs & wires. If that doesn't help fix it, get it tuned.

  7. #7
    old timer blue02Z's Avatar
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    Navy Blue Metallic
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    ^^^^ my thoughts exactly

  8. #8
    Junior Member Footlead's Avatar
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    Thanks for the help!!!

    I have a Diablo Predator programmer coming and I will change the plugs and maybe the wires. The car only has 48,000 miles on it.

  9. #9
    Senior Member Danger731's Avatar
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    sure the maf isn't damaged all connectors tight ?

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    Senior Member Blown Interceptor's Avatar
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    Quote Originally Posted by Danger731 View Post
    sure the maf isn't damaged all connectors tight ?

    Like you know what you're talking about?

  11. #11
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    I would go one heat range cooler with my plugs. Example...if your running NGKTR55's go NGK6...

  12. #12
    Junior Member Footlead's Avatar
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    Maf

    The MAF looks fine and all connectors are tight

  13. #13
    Grand Imperial Wizard Sarge's Avatar
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    Do you think maybe your getting more air flow over the MAF and now it has adjusted the A/F? I mean isnt that the purpose of the mods you listed? Go one notch cooler on your plugs...if the MAF doesnt relearn and it goes away.....

  14. #14
    Junior Member Footlead's Avatar
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    Who Knows

    Correct..... You would think that It would have more air flow and maybe it leaned out some but the computer etc.etc. should have noticed that and compensated for it. I may have gotten some 87 octane for 93 octane prices if you know what I mean. The MAF and computer should adjust for this I would think,,,,,,, It is not like the SLP lid,,,Blackwing filter..and smooth bellllows would make night and day differences,,,but maybe they do.

  15. #15
    Senior Member Blown Interceptor's Avatar
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    I am assuming you took the negative battery cable off for a few minutes to let the PCM relearn?

  16. #16
    Grand Imperial Wizard Sarge's Avatar
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    Retired Outlaw Sum Bitch

    Yeah I was just trying to get folks to 'think"
    That MAF isnt adjusting to the newfound air.....reset that MAF man....

  17. #17
    Junior Member Footlead's Avatar
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    Maf

    I did not disconnect the battery. I assumed that it would adjust the mixture,,,,,did not know the power needed to be shut off. I will do that today.

    Thanx

  18. #18
    Grand Imperial Wizard Sarge's Avatar
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    Two fuse panels on the drivers side in the front. With the ignition on pull the two PCM fuses (one in each fuse box). Wait for 3 min., then shut off the ignition and replace the fuses. Start car! It will idle like crap for about 5 min until the computer relearns it's air to fuel ratio's.

  19. #19
    Senior Member Danger731's Avatar
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    Quote Originally Posted by Blown Interceptor View Post
    Like you know what you're talking about?

    I'm gunna come over there and take your lunch money.

  20. #20
    Junior Member Footlead's Avatar
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    Fixxxxxxxxxxxxxxxxxed

    Did what Sarge said and it Fixed the problem.


    Thanks

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