Staff Answer
Sep 20, 2026 - 11:03 PM
On your 2013 Dodge Challenger R/T 5.7L HEMI, smoke with a strong gasoline smell is a serious warning sign—don't ignore it. The most likely causes are a fuel injector leak or a rich-running condition where excess unburned fuel is getting into the exhaust and burning off, producing that distinctive gas-smelling smoke.
First, check for fuel injector leaks—a leaking injector on the 5.7L HEMI will dump raw fuel into the cylinder, causing smoke and a strong fuel smell from the exhaust. Also check your fuel pressure regulator for failure, as a leaking regulator can push excess fuel into the intake manifold.
If the smoke is coming from under the hood rather than the exhaust, immediately check for any fuel line leaks near hot engine components—this is a fire hazard and should be addressed immediately. Also pull your trouble codes—a faulty O2 sensor or MAF sensor can cause the engine to run excessively rich and produce exactly these symptoms.
Don't continue driving the vehicle until this is diagnosed — fuel leaks near a hot engine are a serious safety risk.
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