Codes
p0300
p0301
p0302
p0303
p0304
1399

all misfires codes...

took it to a a honda shop and they did a pressure test and found that headgasket is leaking into combustion chamber and i coolant is burning cause of that and im getting the misfires.

they will need to remove head and send it to a machine shop for mill and pressure test for cracks and also liquid test valve seats.

they want to charge me aboue 1300 for all of this.

Anyone had this problems before and has done any of this?
I would like to know more

 

I had all the misfire codes as well. Mine went away with a valve adjustment. I wouldn't be surprised if my head is warped though from the heat with the valve clearances being so tight. I'm planning on reworking it soon. See my post about it here. I expect to figure out more once I open it up.

https://www.s2ki.com/s2000/topic/903...t__p__21065419

 

had your car been overheating?

 

Make sure u get an O2 sensor too. Coolant coats the O2 sensor and destroys it. If not replaced u will continue to get misfires.

 

Read-up here:

https://www.s2ki.com/s2000/topic/867...ave-a-misfire/
https://www.s2ki.com/s2000/topic/659930-misfire-thread/