Low RPM speed .cherry red catalytic converter not enough power to drive over 45m

And the trouble codes are ????? .. Very strong gasoline smell from exhaust with smoke? .. Exhaust can easily be 'tested' for excessive back pressure..

If the catalytic converter is cherry red, sounds to me like it's restricted. If you have a buddy rev it up, feel the exhaust flow out the tailpipe. It should push your hand away. If it doesn't I'd suspect the cat