Gun sound from exhaust due to removal of muffler?

1997 NISSAN TRUCK
167,000 MILES • 1.8L • 4 CYL • 2WD • MANUAL
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MIKE BANDA
  • MEMBER
  • 1 POST
After removal of muffler the engine jerks when in gear and when changing gear gun shot sound is heard from the exhaust especially after lengthy acceleration.
Mar 31, 2024 at 10:24 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Hi,

By removing the exhaust, you have changed the back pressure for the engine. That, in and of itself, shouldn't cause what you described. However, if you disconnected or damaged oxygen sensor or sensor wiring, that can throw off the air/fuel mixture to the engine.

Take a look through this link and let me know if anything helps:

https://www.2carpros.com/articles/engine-backfires-while-running

Let me know.

Joe
Apr 1, 2024 at 8:58 AM
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