Hey everyone, two days ago we were driving down the highway and the engine started running rough. On the dash it popped up “engine power reduced” and it was definitely misfiring… We ended up shutting off the engine. We towed the car back to my house. We scanned the car and it has three codes P0300, 0301 and 0302… we first tried to replace the plugs… not really any change. Still running really rough. Two of the plugs on the left side of the engine looked really strange, white and crusty… the other two look normal. We tested all of the coils and could see they were producing spark. While the engine was running, we disconnected the two fuel injectors on the left side of the motor where the funky looking spark plugs were… no change in the rough idle. But if you disconnected them on the two right cylinders, the engine would instantly die. All of this makes me think it’s not getting fuel to the two left cylinders… we were thinking about compression testing it tomorrow to help troubleshoot… does anyone have any ideas? is there some reason those two injectors would stop firing at the same time? Could there possibly be a cam or crank sensor or something like that causing the problem? Please help! Thanks so so much!

 

Hey guys an update on the engine. I did a compression test and unfortunately two cylinders have pretty much zero compression. One was at zero and the other was at 10 to 15 psi… the other two cylinders were both at 180. I am figuring it is probably a head gasket but what else do you think it could be? Bad rings on both cylinders or maybe possibly broken valves on both sides? Seems like it’s probably just the head gasket…no fun.