Explosive loud backfire on Mach 1

[MachNroll]

I have a 21 Mach 1. 12k miles. Resonator delete and X-pipe. No other mods. 6 speed manual tranny. Run Chevron 91 octane. Today I did an aggressive pull for about 150 yards then backed off and took an off ramp. Heard a very loud backfire from the front end of the car. I thought that I blew a tire. I pulled into a parking lot. Smelled sulfur odor. Car idled smoothly. Reved engine and sounded fine. No knocking under the hood. No oil dripping nor odor of anti-freeze. No over heating no warning lights/check engine - nothing. No prior history of backfiring at all. I drove for an additional 30 minutes. Pulled hard no backfire. Upshift/downshift no issues. All normal. So, my question...what the heck happened to cause the aforementioned backfire?

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[2022 Mach 1]

It may have dumped the unburnt fuel into the exhaust which gets burnt by the cats (most likely the smell) with the rapid deceleration causing backpressure in the exhaust which cause a loud exhaust backfire sound. I'm assuming you did not down shift when you first let up off the gas?

 

[MachNroll]

Thank you for your response, No, I did not initially downshift I just stopped pulling.

 

[2022 Mach 1]

You should be fine especially no CELs. Nice ride

 

[MachNroll]

You should be fine especially no CELs. Nice ride

Thank you. Nice ride yourself.

 

[m3incorp]

As said above; all should be good.

 

[MachNroll]

As said above; all should be good.

Cool, thanks for chiming in. PS the color of your car is awesome. Stunning.

 

[m3incorp]

Thank you and a love that color on your car.

Cool, thanks for chiming in. PS the color of your car is awesome. Stunning.

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