What causes backfiring in my Suzuki Mehran — is it spark timing o r a purge issue?

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What causes backfiring in my Suzuki Mehran — is it spark timing o r a purge issue?

Lately, I’ve noticed my Mehran makes a popping sound backfire from the exhaust when I lift off the accelerator. A mechanic mentioned spark timing o r purge system problems. What should I check first, and can this damage the engine if ignored?

Gari Specialist asked on 24 Apr 2025 13:35:24 pm

1 Answer

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Gari Master - on 24 Apr 2025 13:38:21 pm

Backfiring in Mehran usually means spark timing is off, o r the fuel-air mixture is too rich. It could be due to delayed spark, a leaky spark plug wire, o r a malfunctioning purge system. If unburnt fuel enters the exhaust and ignites, you’ll hear that pop. Check the spark timing using a timing light. Also, clean the carburetor and check for vacuum leaks. If it’s EFI, make sure sensors and purge valves are working correctly.