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weird noise when driving?

This is a discussion on weird noise when driving? within the General Help forums, part of the LSx Technical Help Section category; hey guys got a quick question for you. Ok so when im driving my car and decide to punch it ...

  1. #1
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    weird noise when driving?

    hey guys got a quick question for you. Ok so when im driving my car and decide to punch it the car is suddenly kind of doggy and it makes a noise like a faint tick or knock i know its not an engine rod knocking. what is weird is that my dad had a siverado and i could notice that noise in his truck when i would drive that sometimes. to me it almost sounds like it could be a vaccume leak or maybe a bad coil pack. if anyone has had problems like this or anyone has any suggestions would you please let me know. i have had my 2000 camaro z28 for about a year and a half, noticed the sound a while ago but i really didn't pay much attention to it. thank you in advance.

    --MIKE--

  2. #2
    Senior Member 99Hugger's Avatar
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    Most likely what your hearing is detonation. Computer is pulling timing, which is why it feel sluggish. Pretty common in LS1 world. Usually caused by a lean condition. Lean condition could be caused by any number of things... Header install without a tune, clogged injector(s), clogged fuel filter, bad fuel pump, failing cat, bad O2's, oil contamination through the PVC system... the list goes on.

  3. #3
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    thanks for the reply. so this is nothing major then? awesome so when i get home from the desert i will start with some of the things you have listed. if you have any other suggestions it would be much appreciated. thanks again.

  4. #4
    Member camaross19973's Avatar
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    what kinda gas do u use regular or premium cuse it might be the gas u use to if that is regular

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    the lady i bought it from said all she ran in it was regular, so thats what i did. after reading some other posts i hear that happends a lot with regular so when i get home i will run some premium in it and see what happends.

  6. #6
    Senior Member 99Hugger's Avatar
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    Pretty good chance thats causing the detonation. Didn't even think to type that, I assumed everyone ran premium in their LS1! The stock compression is 10.1:1 after all.

  7. #7
    O U 8 1 2 Spaz's Avatar
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    Quote Originally Posted by mikemurray13 View Post
    thanks for the reply. so this is nothing major then? awesome so when i get home from the desert i will start with some of the things you have listed. if you have any other suggestions it would be much appreciated. thanks again.
    detonation is a major problem if not fixed... bye bye pistons...

  8. #8
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    Gm recommends 91 min. octane on all LSX engines in cars.
    1998 Camaro SS Hard Coupe Bright Red #1593
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  9. #9
    Senior Member Tyler_LS1's Avatar
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    so could you run regular with 9.8 compression?

    Im guessing no

  10. #10
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    Quote Originally Posted by Tyler_LS1 View Post
    so could you run regular with 9.8 compression?

    Im guessing no
    I'd say no. An old school rule of thumb on carbed engines were 9.0 to 1 or less for pump gas. 9.0 to 1 or higher premium.

  11. #11
    Senior Member Tyler_LS1's Avatar
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    cool, thanks

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