Hello there. I'm new to this forum and have no knowledge of cars whatsoever so please bear with me. Anyway, I hope you guys are well because I'm not. My car seems to be misfiring due to cylinder 6 again even after I got new coils and a new fuel injection module including a new alternator. A month or so later the problem has returned and I don't know why.

My other issue is my coolant. The light came popped up on Thursday prompting me to buy some coolant for it. filled it up and now two days later I see that it dropped down to the level it was before. is this normal?

Also, both problems happened like an hour after I got gas. I'm sure it's not the gas because this is the second time this has happened and I've gone to two different gas stations in different cities within the last three months once I filled up.

 

Well, it seems you have someone telling you it is a misfire in cylinder 6. Both issues may not be related. Right now, I'd suggest having that cylinder spark plug removed see if coolent is leaking into that cylinder, that would explain (if it is), both issues.

 

I took it to Advanced Auto Parts and their engine checker came back with Code P0306 indicating that it's cylinder 6 that's misfiring again. I'd remove it myself if I knew where it was.

 

Sounds like it's time to see your friendly reputable mechanic. Please post back what they find.

 

I would think a possible blown head gasket or a cracked head. Has the car been ran hot lately? When you remove your radiator fill cap (do so only with a cold engine) with the car running is there bubbles rising up through the coolant?

 

Sorry for the late reply, #6 is going to be on the front of the engine, farthest (as facing the engine) right side

 

I thought #6 was located on the driver side of the car as you said, but on the head that faces the firewall.