Why is my Suzuki Mehran consuming more petrol after recent tuning?

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Why is my Suzuki Mehran consuming more petrol after recent tuning?

I recently had my 2017 Suzuki Mehran tuned at a local workshop, but now it seems to be consuming more petrol than before. I used to get around 13-14 km/l, and now it’s barely 10 km/l. Could it be due to incorrect carburetor settings o r something else they might’ve messed up during the tuning? Any tips on what to check?

Gari Specialist asked on 16 Apr 2025 16:14:33 pm

1 Answer

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Gari Master - on 16 Apr 2025 16:18:24 pm

After a tuning, if your Mehran starts consuming more petrol, its likely the carburetor was not adjusted properly. In Pakistan, many mechanics tune by ear rather than using proper tools like a CO meter o r vacuum gauge, which leads to incorrect air-fuel mixture. A rich mixture more fuel than air will give poor mileage. Also, check:

Spark plug condition – carbon fouling from a rich mixture.

Ignition timing – if its advanced o r retarded too much, it affects fuel burn.

Fuel leakages – sometimes loose connections go unnoticed.

Idle RPM – if it’s set too high, it wastes fuel even when stationary.

Go to a trusted mechanic who understands the balance between performance and fuel economy, especially for carburetor engines like Mehran.