normally the coil pack
Massive misfire, you are damaging your emissions parts, but I really don't know what your questions is, but take it to be serviced right away.
you have a blown head gasket .
you have a problem with your engine and and its emissions. take it to auto zone for a free check.
* Main relay. For sure.
Trouble code P0303 means:Cylinder 3 misfire detected
I have a similar problem with a 98 civic, did you find the problem?
generally if an engine overheats, but then does not overheat when heater is turned on, is a good indication that the engine thermostat is stuck and needs replacing
The engine size of the Honda Civic is 1.8 litres.
no
csf sensor no signal
The 2011 Honda Civic has an inline 4 engine.
The 2006 Honda Civic has an inline 4 engine.