hi there i got a friend with a EP3 that he is having misfire in all 4 cylinder, he put all new coil and spark plugs already and is still getting same code and lack of power around 2 to 3 rpm, and car smell a gas!!! every time he erase the codes they come back in 5sec you start the car, some opinion what can he check next and what can be the problem? thanks

 

Check the fuel pressure. If it's too high it's the fuel pressure regulator. If fuel pressure is fine check that the injectors are squirting and not always open.

 

thanks but we found the problem!!!, it has 170psi 1cylinder, 70psi 2cylinder and, 162psi in 3 and 4 cylinder!!! in blown lol

 

newbie here

So after finding the misfiring/low compression cylinder.

How do you fix a misfiring cylinder?