2018 Honda Civic Si Coupe White Check Engine Light Flashing

[mikerodriguez3593]

I own a 2018 Honda Civic Si Coupe White. The only mod is a magna flow exhaust with a magnaflow resonator. I took it to the Honda dealer and they have replaced the spark plugs multiple times. Due to a P0303 cylinder 3 misfire. The problem keeps persisting. I will start losing power during 2nd gear around 3500 rpms. Then in 3rd gear I lose power at the same rpms and then the car goes into limp mode. I will then have the check engine light turn on and start flashing. The second Honda dealer I took it to stated that it is the head gasket. The head gasket is blown and there are combustible fluids in the coolant system. The car has only 21xxx miles on it. Has anyone experienced this problem? Will replacing the head gasket solve the check engine light flashing? Is a P0303 cylinder 3 misfire code on the OBD an indicator of a blown head gasket? If anyone has any details please contact me.

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[Dirtychonies]

I had a misfire in cylinder 3 on my 17 Si. Dealer changed the fuel injector and its been fixed since.

 

[jdm_mike]

You got a magnaflow? Yikes. Say bye bye to your warranty cus it got voided

 

[mikerodriguez3593]

You got a magnaflow? Yikes. Say bye bye to your warranty cus it got voided

I feel ya heavy.

 

[mikerodriguez3593]

I had a misfire in cylinder 3 on my 17 Si. Dealer changed the fuel injector and its been fixed since.

Have you run into any other issues with your Gen X?

 

[Dirtychonies]

Other than clutch slipping and AC taking a shit, no issues.

Current set up is: PRL FMIC, Mishimoto intake, MAP catted DP, KTuner Dual 19/23 tune.

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