Backfiring and sputtering?

1995 CHEVROLET CAPRICE
134,093 MILES • 5.7L • V8 • 2WD • AUTOMATIC
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CHEVY5.7
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My car listed above is making a popping sound when I accelerate, and it is sputtering and barely goes but when it's in park or neutral it techs up just fine and don't pop but as soon as I put it in any gear that's when it starts doing it. Thanks for the help. GUUS
Jun 2, 2023 at 11:52 AM
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STRAILER
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I have seen a broken valve spring cause this problem, but to be sure can you upload a short video of the engine having the problem then I can tell for sure.

This guide can help as well:

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/symptoms-of-engine-misfires-a-step-by-step-guide


Please go over these guides and get back to us.
Jun 3, 2023 at 9:34 AM