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Old Mar 28, 2009 | 06:28 PM
  #1  
Texass683's Avatar
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From: Arlington, Tx
Default back firing

I have a 2002 Z28 that I have had for the past 20,000 miles. It currently has 120,xxx on the clock and has always run like a dream, very strong, very smooth. Recently however, it has started to backfire on me. Mainly when I am shifting gears, either up or down in the gear box. I am wondering if I need a tune or what the problem might be.

I dont know if this could be the problem but the car has always been a Texas car, 93+ octane, and I recently moved out to California a year and a half ago and the highest octane it has had in it since is 91.

Thanks for help in advance. I did not know where to post this so its also posted in the internal engine section.
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Old Mar 29, 2009 | 12:36 PM
  #2  
Caminsky's Avatar
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Have you pulled the engine codes? If not, hop on over to autozone and have them pull the codes (it's free). I would then do a search on the site of the codes you pulled and see what others' solutions were.
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