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Weird noise while accelerating in a 2001 pontiac aztek?

Source: Yahoo! Answers

I get a classic "can of marbles", maybe just a little higher pitched, noise when accelerating. It happens when I first start driving or when I need to accelerate quickly. it starts around 3k rpm but will go away if pushed to 4k. Can't really even figure out where to start... Read More

  • It could be engine ping. Have you tried different brands and grades of gasoline? It's worth a try. You might only experience ping under a load, so just revving it up in park wouldn't reproduce the noise. If your engine is running hotter than normal, it could cause a ping. It's possible that it's an internal engine... Read More
  • If you have the 3.4 then its 1 of 2 things 1st all those engines have a piston noise due 2 a lack of teflon coating there was a bulletin to us mech to repl pistons but it was so common and not harmful to engine gm stopped replacing pistons. 2nd or you have a worn connecting rod bearing not good . what u need to do can... Read More

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